Length Units of Civilisations: Games and Knowledge

Hello everyone! You are in the playroom of the Knowledge County, and this is all about the length measurement units that exist around the world — invented by humanity and made for humans.

The page has two main subdivisions. One is a concentrated knowledge base that contains the civilisations and all the length units each civilisation used. Every unit includes a detailed description, its equivalent in both metric and imperial values, and its internal relations (for example, how many smaller units compose the larger unit). Even more, the page presents what each unit was historically used for — whether for construction purposes, tailoring, jewellery production, or other craft-specific measurements belonging to vanished civilisations.

And the second subdivision is a collection of simple games shaped as quizzes. Each game has its own description and instructions on how to play it. The games are designed for self-testing, to enhance memory retention, and may simply be used as entertainment for family fun. They also help make educational processes less boring in the classroom.

All About The Lengths Units

For understanding, we should provide here one significant disclaimer of terminology: The Cubit definition: “Cubit” is the most widely spread modern unifying name for a family of ancient base-length units. It is not a single universal ancient measure, but rather a modern approximation used to describe several body-based units across different civilisations. Many cultures independently used forearm-length measurements, which later inspired the attempt to group them under the common term “cubit” for convenience and comparative study.

Sumerian Civilisation Units of Length

For the cultural background of the Sumerian civilisation, you may visit our publication by clicking this link: ['Visit Sumer Civilisation Publication']

Here we have listed all known and existing Sumerian length units, each with its detailed description.

Kush (KUŠ / Finger)

The smallest common Sumerian unit of length, used in construction, craftwork, and administrative tablets. Often grouped into palms and feet.

  1. 1 kush = base finger width
  2. 30 kush = 1 ammatu (cubit)
  3. 1 kush = ~1.65 cm
  4. 1 kush = ~0.65 inch

Šu (ŠU-SÌLA / Foot / spells as 'shoo')

Sumerian unit of length equivalent to a ‘foot’. Used in building plans and field measurement. Forms the basic component for Ammatu and Nindan, which are the larger Sumerian length units.

  1. 6 šu = 1 ammatu
  2. 72 šu = 1 nindan
  3. 1 šu = ~29.7 cm
  4. 1 šu = ~11.69 inch

Ammatu (AMMATU / Cubit / Forearm)

A Sumerian length unit, larger than šu and kush. A forearm-based measure (commonly called a cubit), used as the standard building and architectural unit. Appears consistently in temple and canal texts. Forms the proportional basis for the Nindan.

  1. 12 ammatu = 1 nindan
  2. 1 ammatu = 6 šu (shoo)
  3. 1 ammatu = 30 kush (KUŠ / finger)
  4. 1 ammatu = ~49.5 cm
  5. 1 ammatu = ~19.49 inch

Nindan (NINDAN / Rod / Standard Measure)

A major Sumerian unit of length, larger than šu, kush, and ammatu. The primary surveying and land-measurement unit, appearing in all known field survey tablets. Used for construction, agricultural planning, and boundary definitions.

  1. 1 nindan = 12 ammatu (Sumerian cubits)
  2. 1 nindan = 72 šu (shoo)
  3. 1 nindan = 360 kush
  4. 1 beru (double rod) = 2 nindan
  5. 1 nindan = ~5.94 m
  6. 1 nindan = ~19.49 feet
  7. 1 nindan = ~6.5 yards

Beru (Double Rod / Larger Measure)

The largest known Sumerian unit of length, larger than nindan, ammatu, šu, and kush. Used for long distances, canal measurements, and boundary descriptions. Mentioned in Sumerian and later Akkadian administrative sources.

  1. 1 beru = 2 nindan
  2. 1 beru = 24 ammatu (cubits)
  3. 1 beru = 144 šu (shoo)
  4. 1 beru = 720 kush
  5. 1 beru = ~11.9 m
  6. 1 beru = ~39 feet
  7. 1 beru = ~13 yards

Egyptian Units of Length

To learn more about the Ancient Egyptian civilisation and how its development influenced the creation of length units, please read our article by clicking this link: [Ancient Egypt socio-cultural development].

All length units listed below belong to the Ancient Egyptian civilisation and are ordered from the smallest to the largest. Each unit is provided with its spelling, symbols, and values — both in internal relationships and in their metric and imperial equivalents. Egyptians had a well-developed system of measurement, widely approved and standardised. It was closely aligned with social structure and institutional authority, reflecting the centralized control of a single ruler who managed both the state and its administrative tools.

ḏbꜥ — “digit”, transliteration: ḏbꜥ (also dbʿ), phonetic spelling: djeba. Understand as Digit / Fingerbreadth

The smallest known Ancient Egyptian length unit, ‘djeba’. As the name suggests, it derives from the finger, as many other units have anthropomorphic origins. Meaning: the smallest finger-based unit; “digit”. Applied as a length standard for crafts, carpentry, stonecutting, jewellery, and architectural detailing. Common in ratio-based inscriptions for temple decoration and sculpture proportions. Possibly used for refining the precision of larger units (by concatenation of djeba one may calculate the precise length of the palm ‘shesep’, equal to 4 djeba).

  1. 1 djeba (ḏbꜥ / digit) = 1/4 shesep (palm / šsp)
  2. 1 djeba (ḏbꜥ / digit) = ~1.875 cm
  3. 1 djeba (ḏbꜥ / digit) = ~0.74 inch
  4. 1 djeba (ḏbꜥ / digit) = ~2.21 bc (barleycorn)

šsp — “shesep”, transliteration: šsp, phonetic spelling: shesep

Shesep, the Ancient Egyptian length unit second in the hierarchy (after djeba). Meaning: a small hand-related measure, also anthropomorphic. Applied in administrative or construction accounts for measuring small items, textiles, or fine architectural adjustments.

  1. 1 shesep = 4 djeba (ḏbꜥ / finger)
  2. 1 shesep = ~7.5 cm
  3. 1 shesep = ~2.95 inch

ḏrt — “hand”, transliteration: ḏrt, phonetic spelling: djeret

Djeret is the third unit in the Egyptian length hierarchy. It means ‘hand’ and equals 5 fingers (some sources claim 4, but modern research favours 5). Used in workshops for woodwork, stonecutting, metalworking, and measuring small objects. Commonly found in dimension notes on reliefs and statues.

  1. 1 djeret = 5 fingers (djeba / ḏbꜥ / digit)
  2. 1 ḏrt (djeret / hand) = 1.25 shesep (šsp / small hand)
  3. 1 djeret = ~9.38 cm
  4. 1 djeret (hand) = ~3.69 inch

ḫfꜥ (or ꜣmm) — “palm / forearm-part / fist”, transliteration: ḫfꜥ or ꜣmm, phonetic spelling: khaf’a / amm

The fourth Ancient Egyptian length unit in the hierarchy. A sub-cubit forearm segment. Applications: architectural measures, ritual object inscriptions, and proportional rules in artistic canon grids.

  1. 1 khaf (amm) = 6 fingers (djeba / digit)
  2. 1 amm (khaf / ḫfꜥ) = 1.5 shesep (small hand / šsp)
  3. 1 khaf (amm / fist) = ~11.25 cm
  4. 1 amm (khaf / ḫfꜥ) = ~4.23 inch

šꜣt nḏs — “small span”, transliteration: šꜣt nḏs, phonetic spelling: shat nedjes

The fifth length unit in the Ancient Egyptian hierarchy. Applied in textiles, crafting small everyday objects, and fine adjustments in stone and wood.

  1. 1 shat nedjes = 12 fingers (djeba / digit / ḏbꜥ)
  2. 1 shat nedjes (šꜣt nḏs / small span) = 3 shesep (šsp / small hand)
  3. 1 shat nedjes = 2 fists (khaf / amm)
  4. 1 shat nedjes = ~22.5 cm
  5. 1 shat nedjes = ~8.86 inch

šꜣt ꜥꜣ — “large span”, transliteration: šꜣt ꜥꜣ, phonetic spelling: shat aa; alternate names: pḏ nḥs / pḏ nꜣs (“copper rod / bronze rod”)

‘Shat aa’, or the large span, is the sixth unit in the system. Represents an outstretched hand-span, larger than nḏs (nedjes). Usage: construction, rope measurement, agricultural tools, surveying ropes, and boundary layout.

  1. 1 shat aa (šꜣt ꜥꜣ) = 14 fingers (djeba / ḏbꜥ)
  2. 1 shat aa (šꜣt ꜥꜣ / copper rod) = 3.5 shesep (šsp / small hand)
  3. 1 shat aa = ~26.2 cm
  4. 1 shat aa = ~10.31 inch
  5. 1 shat aa = ~0.86 foot

ḏsr — “foot” / “bent arm”, transliteration: ḏsr, phonetic spelling: djeser

The Egyptian length unit meaning ‘foot’. In the hierarchy, djeser occupies the seventh place. Used as a measurement standard for walking distances, architectural floor plans, and block dimensions. Appears in temple and tomb construction.

  1. 1 djeser (ḏsr) = 16 fingers (djeba)
  2. 1 djeser (ḏsr) = 4 shesep (small hand)
  3. 1 djeser (ḏsr) = ~30 cm
  4. 1 djeser (ḏsr) = ~0.98 foot
  5. 1 djeser (ḏsr) = ~11.81 inch

rmn — Remen

The remen is the eighth unit in the hierarchy. Designed as a derivative unit used in architectural geometry, pyramid and temple layout, and diagonal calculations. Used heavily in Middle Kingdom mathematical papyri. Possibly the diagonal of a square whose side is 1 ‘palm’ or 1/2 cubit depending on period.

  1. 1 remen = ~20 fingers (djeba)
  2. 1 remen = ~5 shesep (small hand)
  3. 1 remen = ~37.5 cm
  4. 1 remen = ~14.76 inch
  5. 1 remen = ~1.23 feet

mḥ nḏs — “small cubit”, transliteration: mḥ nḏs, phonetic spelling: meh nedjes

‘Meh nedjes’ is the ninth unit in the Egyptian length hierarchy. Used as a measurement standard in domestic construction and for agricultural tools.

  1. 1 meh nedjes = 24 fingers (djeba / digits)
  2. 1 meh nedjes = 6 shesep (small hand)
  3. 1 meh nedjes = ~45 cm
  4. 1 meh nedjes = ~17.71 inch
  5. 1 meh nedjes = ~1.47 feet

mḥ — “cubit” / royal cubit, transliteration: mḥ (often mḥ nswt — “royal cubit”), phonetic spelling: meh

‘Meh’ is the Egyptian cubit, the tenth unit in the measurement hierarchy. Used as the core unit for architecture, temples, pyramids, surveying, land measurement, and engineering. Appears in sacred geometry and cubit rods preserved from the Middle Kingdom onward.

  1. 1 meh (mḥ / royal cubit) = 28 fingers (djeba)
  2. 1 meh (mḥ / royal cubit) = 7 shesep (small hand)
  3. 1 meh (mḥ / royal cubit) = ~52.3–52.5 cm
  4. 1 meh (mḥ / royal cubit) = ~20.59 inch
  5. 1 meh (mḥ / royal cubit) = ~1.72 feet

Senu — “double royal cubit”, transliteration: senu

The eleventh Egyptian length unit is ‘senu’. Used in large architectural planning, monument scaling, and long construction elements (beams, blocks, door frames). Derived from the Royal Cubit by doubling its length.

  1. 1 senu = 2 meh (royal Egyptian cubit)
  2. 1 senu = 14 shesep (small hand)
  3. 1 senu = 56 fingers (djeba)
  4. 1 senu = ~105 cm
  5. 1 senu = ~41.33 inch
  6. 1 senu = ~3.44 feet

ḫt — “rod / pole”, transliteration: ḫt, phonetic spelling: khet

Khet is the twelfth unit in the Ancient Egyptian hierarchy. Used for evaluating distances: land measurement, canal alignment, irrigation work, and boundary descriptions in agricultural texts.

  1. 1 khet = 100 meh (royal cubit)
  2. 1 khet = 700 shesep (small hand; explanatory relation, not used in practice)
  3. 1 khet = ~52.3 m
  4. 1 khet = ~57.19 yards
  5. 1 khet = ~171.6 feet

Cha-ta — “field-length”, transliteration: likely ḫꜣt-tꜣ or ḥꜣt-tꜣ, phonetic spelling: kha-ta

Cha-ta is the thirteenth unit in the Egyptian measurement hierarchy. Mostly used for land taxation, field planning, irrigation mapping, and administrative papyri (e.g., Ramesside land registers).

  1. 1 cha-ta = 10 khet
  2. 1 cha-ta = 1000 meh (royal cubit)
  3. 1 cha-ta = ~520 m
  4. 1 cha-ta = ~568.68 yards
  5. 1 cha-ta = ~0.32 mile

Iteru — “river distance / canal measure”, transliteration: jtrw, phonetic spelling: iteru

Iteru is the largest known Ancient Egyptian unit of length, occupying the fourteenth place in the hierarchy. Used for river distances, canals, long land routes, and regional geography. Appears in New Kingdom geographical lists.

  1. 1 iteru = 200 khet
  2. 1 iteru = 20 cha-ta
  3. 1 iteru = 20000 meh (royal cubit)
  4. 1 iteru = ~10400–10500 m
  5. 1 iteru = ~10.45 km
  6. 1 iteru = ~6.49 miles
  7. 1 iteru = ~11428 yards

The Ancient Babylon Kingdom and its Length Units

To learn more about the Ancient Babylon Kingdom and how its development influenced the creation of length units, please read our article by clicking this link: [Babylon, So Legendary, As Mystificated].

Here we should note that we intentionally skip the units of length attributed to the Akkadian Empire, and not without reason. There are extremely few reliable archaeological sources that allow us to achieve rigid data about their measurement system. In contrast, the Babylonian Kingdom provides us with firm and rich data related to its administrative system, and all related subjects the measurement systems belong to as well. The Babylonian units of length presented below are listed from the smallest to the largest. Each unit includes a detailed description, its internal relations within the Babylonian measurement system, and its approximate equivalents in both metric and imperial units.

šu-si (ubanu), spelt as shu-shi or Ubanu

The shu-shi or Ubanu is the smallest known Babylonian length unit we know. Latest researches discovered well-attested evaluation, we are representing in the rates below. Usage of the shu-shi in Babylon: craftsmanship & workshop measurements (tool-edge widths, thickness of pegs, heights or depths of decorative carvings, very small object dimensions (ritual items, inlays)); textile & cord measurements (width of narrow textiles, spacing in woven bands, thickness of cords/strings); administrative construction details (small offsets (“move beam 2 su-si”), thin wall layers, precise gaps, ceremonial item measurements).

  1. 1 shu-shi (šu-si / ubânû) = 1/24 ammatu ( kush(kuš) / Babylonian cubit)
  2. 1 šu-si = ~2.08 cm
  3. 1 šu-si = ~0.82 inch

kush(kuš), or Ammatu. Babylonian cubit

In Neo-Babylonian texts the cubit is given as ~0.5 m. The basic and commonly used Babylonian length unit, the ammatu (kush / Babylonian cubit), was used in construction: for wall and room dimensions, as a unit for wall thickness, breadth, and similar dimensions in building descriptions and plans, and for other implementations in routine administrative and economic records.

  1. 1 kush = 24 shu-shi (ubânû, understand as a finger)
  2. 1 kush (cubit) = ~50 cm
  3. 1 kush (ammatu, cubit) = ~1.64 feet
  4. 1 kush (ammatu) = ~19.69 inch

gi / qânu. Read as ka-noo, kha-noo, Gi

The qânu comes from the ex-Akkadian territories within the Babylonian Kingdom and is well attested as a large unit of length used in the Babylonian measurement system. According to the latest research, the gi (ka-noo / qânu) was equal to 7 Babylonian cubits (~0.5 m), so we may count the unit as equivalent to ~3.5 m in the metric system. Its usage was mainly in large construction approximations, and in field and agricultural measurements.

  1. 1 ka-noo (kha-noo, gi, qânu) = 7 Babylonian cubits
  2. 1 gi (ka-noo) = ~3.5 m
  3. 1 gi (qânu) = ~3.82 yards
  4. 1 gi (ka-noo) = ~11.48 feet

GAR. Large Babylonian length unit.

Babylonians left us a lot of tables, and to be clear, not all of them are well attested till now. But the largest unit we may firmly assert was the Gar among the Babylonian units of length. The usage of the Gar was mainly the same as its brother ka-noo, and the value of the Gar is double that of the gi (ka-noo).

  1. 1 gar = 2 gi (ka-noo)
  2. 1 gar = 14 cubits (kush / ammatu)
  3. 1 gar = ~7 m
  4. 1 gar = ~22.9 feet
  5. 1 gar = ~7.65 yards

Ancient Persia Units of Length

The cultural background of Persian units of length invention we recommend to visit in our scholar article [navigate to ‘When We Spelling Persia…’ publication].

The Persian civilisation provides us with a broad range of records, and among them we find a highly structured and well-established metrology system. We should note that the Persian civilisation here must be understood only in the context of the Achaemenid Persian Kingdom (c. 550–330 BCE). Here we list only the length units belonging to that epoch. As we prefer, we list all known units in order from the smallest to the largest one, with a brief description of each unit’s usage.

Dasta / Handbreadth (Possible Minor Unit)

Possibly used as a length for standardisation of construction elements such as stone blocks (bricks or building-block widths). Scientists are still brainstorming hypotheses, and some are asserting that: “Possible, but classification varies (some researchers argue it is architectural, not metrological).”

  1. 1 dasta = 1/6 Arš (Arša / Old Persian)
  2. 1 dasta = ~11 cm
  3. 1 dasta = ~4.33 inch
  4. 1 dasta = ~0.36 foot

Bār (Span / Handspan)

This unit appears as the half-cubit or handspan in Achaemenid-era (Ancient Persia Kingdom) architectural proportions. Let's call it the bar. Its possible usage is as a length unit for construction elements such as doors, in-building arches, and other relatively small constructive elements of constructions. The speculation (earlier) comes from the observation that door moulding modules at Persepolis appear in 3 bār = 1 half-cubit ratios. This aligns exactly with older Elamite spans.

  1. 1 bar = 2 dasta
  2. 1 bar = 22 cm
  3. 1 bar = ~8.66 inch
  4. 1 bar = 0.72 foot

Arš (Arša / Old Persian) – The Achaemenid Cubit

This is the core Achaemenid unit, archaeologically confirmed, so no speculations, and all will be good for us! This is the basic unit of Persian length units, and we may truly call this unit the Persian cubit. It was widely used in construction, and as evidence, and in our own defence, we may provide: the Persepolis Fortification Tablets (Elamite) show ratios of workers’ rations correlated to cubit-based construction tasks.

  1. 1 arsh (Arš) = 3 bar
  2. 1 arsh = 6 dasta
  3. 1 arsh = ~66 cm
  4. 1 arsh = ~2.16 feet
  5. 1 arsh = ~26 inch

Parasang (Old Persian frasang) – Long-Distance Unit

The length unit is unique among the ancient civilisations. But the Greeks left us records, and these confirmed that such a distance had a place in the Persian length-unit system. The parasang was used on the roads and for evaluating distal places. Here we may only compare it with other contemporary long-distance units.

  1. 1 parasang = 30 Greek stadia (1 Greek stadion = 185 m / 202.3 yards)
  2. 1 parasang = ~5.55 km
  3. 1 parasang = ~3.45 miles

Jewish Kingdom (Biblical) Units of Length

For understanding the units of length, and the processes that influenced how the units were evolved and designed, visit the publication ['The Biblical Measurements, or Israelite Society Metrology, Cultural Background']

The Biblical units, well known and attested by scientists, contain four main units. But here we provide a broader list of them, and if a unit’s existence is not among these four, we mark it with a tomb pink cross (✝️); otherwise, we mark the unit with a flower (🌷) — a well-attested unit of existence. The units below are listed from smallest to largest, each one with its self-rating (within the Jewish measurement system internal ratios), and with values in both metric and imperial equivalents as well.

Etzba (Finger)🌷 (אצבה)

As in many other cultures, the etzba was an anthropomorphic unit (based on a human body-related length, in this particular case from the finger). Mostly used for measurements requiring a relatively precise approach, such as pottery, calculation of larger units, and crafts like jewellery and tailoring with tiny detailisation.

  1. 1 etzba = 1/6 tefach
  2. 1 etzba = ~1.9 cm
  3. 1 etzba = ~0.74 inch

Tefach (Handbreadth)🌷

The Tefach was the second unit in the Judah kingdom length-system hierarchy, used mostly for tailor-related crafts, as a basis for defining the cubit, and in construction-draft approximation (scale recalculation from drafts to real objects, and this is a hypothetical derivation).

  1. 1 tefach = 6 fingers (etzbaot (plural from etzba) / etzba)
  2. 1 tefach = ~11.4 cm
  3. 1 tefach = ~4.49 inch

Zeret (Span)✝️

The Zeret, or span, is a hand-based length unit found in later Jewish tradition and related cultural sources. It represents the distance between the tip of the thumb and the tip of the little finger when the hand is fully stretched. This unit is not firmly attested in the Biblical-period measurement system, but it appears in post-Biblical texts and later halakhic descriptions, so we include it here with a tomb pink cross as a partly speculative unit.

  1. 1 zeret = 3 tefach (traditional post-Biblical relation)
  2. 1 zeret = ~22.8 cm
  3. 1 zeret = ~8.98 inch

Ammah (Cubit)🌷

The basic unit of the Biblical and Judah kingdom measurement units is the Ammah. Widely used in society’s everyday life, both for constructions and for approximations in evaluations of large volumes and trading.

  1. 1 ammah = 4 tefach
  2. 1 ammah = 24 etzba
  3. 1 ammah = ~45.7 cm
  4. 1 ammah = ~18 inch
  5. 1 ammah = ~1.5 feet

Qaneh (Reed)✝️

The Qaneh appears in the Bible as a measuring reed, most clearly in Ezekiel’s vision, where it is described as six long cubits (standard cubit is Ammah). This value is Bible-sourced and disputable, and it is not attested as a standardised measurement unit in the historical Judah kingdom.

  1. 1 qaneh = 6 long cubits (Bible-sourced, disputable)
  2. 1 qaneh in metric estimate: ~3.12–3.30 m
  3. 1 qaneh in feet: ~10 ft 3 in to ~10 ft 10 in
  4. 1 qaneh in inches: ~123 in to ~130 in

Mil (Mile)🌷

The mil is the largest known and undisputable unit of length designed in the Judah kingdom, and mostly used for distance evaluation. Because it is a very large unit, we found it inappropriate to calculate the length using self-related units.

  1. 1 Judah mil = ~1609 m
  2. 1 mil = ~1 mile

Parasang (Persian distance unit)✝️

The Parasang is an ancient Persian long-distance unit, not a Judahite measurement. It appears in Greek and later historical sources as the standard Persian road-measure. Because this value is foreign to the Biblical metrology system and does not appear in Judahite records, we mark it with a tomb pink cross as a disputable, non-native unit included only for comparison.

  1. 1 parasang = 30 Greek stadia (historical definition)
  2. 1 parasang in Metric value: ~5.55 km (~5550 m)
  3. 1 parasang in Miles: ~3.45 miles
  4. 1 parasang in Feet: ~18,144 feet
  5. 1 parasang in Inches: ~217,728 inches

Ancient Greece's Length Units

For an Ancient Greece culture review, we recommend visiting our article [Ancient Greece, or Diversity of Similarity... ]

To learn more about the socio-cultural and economic structure of Ancient Greece, visit the publication [Ancient Greece: Social Structure, Economy, and Polis Society Overview]

The Greek measurement system is well attested, and among ancient civilisations one of the richest in archaeological artefacts, but here we will propose to you only a few of them. Here we will provide the Athenian well-attested length units. For general information, we should point out to our honourable reader that each city-state among the Hellenic civilisation’s representatives had its own measurement systems, close in naming, but slightly different in values. All units below we ordered from the smallest to the larger one.

Daktulos (Finger) – δάκτυλος

Ancient Greeks came to the decision not to invent something new, and called the smallest basic unit the finger. By the way, have you heard the medical term dactyloscopy? Yes, the root of the word comes from the Greek daktulos! Used in craftsmanship (bronze, stone carving). Common in body-related measures, such as widths and small architectural features. Found in ancient metrological lists and horological descriptions.

  1. 1 dactulos = 1/16 pous (foot)
  2. 1 dactulos = 1/4 palais (palm)
  3. 1 dactulos = 19.25 mm
  4. 1 dactulos = 1.9 cm
  5. 1 dactulos = ~0.75 inch

Palais (Palm / παλαιστή / παλαιά)

Palais is an equivalent of the palm, and may be related to such anthropomorphic elements as the palm or fist, applied as hand-based measurements, especially in trades: textile work and carpentry. Found in athletic descriptions and gymnasium training references.

  1. 1 palais = 4 fingers (dactuloi this is Greek plural of singular dactulos(just as poleis is plural of polis))
  2. 1 palais = 1/4 foot (pous)
  3. 1 palais = 7.7 cm
  4. 1 palais = ~3 inches

Spithamē (Span) – σπιθαμή

Sometimes now, to get some approximation when we do not have standards of length (like the metre), we use our hand — the expanded palm distance from the large finger to the fifth finger. The Greeks did the same, and this is a span. Spithame was the ancient Greek name for the span, used mostly as we use it now: everyday measurements, small construction tasks, tailoring approximations. Frequent in Homeric and Classical descriptions of personal equipment.

  1. 1 spithame = 3 palais (palms)
  2. 1 spithame = 12 dactuloi
  3. 1 spithame = ~23.1 cm
  4. 1 spithame = 9 inches

Pous (Attic Foot) – πούς (podes plural)

As you may note, none of the civilisations ever surpassed such a very comfortable unit to use as the foot. So the pous is the Ancient Greek foot. Used in architecture, including column spacing, temple stylobates, and house plans. Found in stone mason guidelines and building accounts of the Athenian Acropolis. Appears in Classical-era clothing, weaving, athletics, and military equipment measurements.

  1. 1 pous = 4 palaia (palms)
  2. 1 pous = 16 dactuloi (plural from dactulos, finger)
  3. 1 pous = 30.8 cm
  4. 1 pous = 12.12 inches

Pechys (Cubit) – πήχυς

The Athenian cubit (forearm measure) was called the pechys. Before we had not pointed out that in weapon development the unit was widely used for armour standards, as well as for swords, bows, and arrows for warriors’ equipping, among other more common applications. More common usage of the length unit: used heavily in construction, timber trade, and military gear (spear shafts, shield dimensions). Appears in Athenian building accounts, for example, for roof beams and stone block cuts.

  1. 1 pechys = 2 spithame (spans)
  2. 1 pechys = 24 dactiloi (fingers)
  3. 1 pechys = 46.2 cm
  4. 1 pechys = ~18 inches
  5. 1 pechys = ~1.5 feet

Orguia (Fathom) – ὀργυιά

The orguia is an ancient Greek length unit, approximately equal to six Greek feet. A primary unit for measuring depth of water, rope lengths, and anchor lines. Used in land surveying for larger increments. Mentioned in naval descriptions by Herodotus and Thucydides. Some sources provide the transliteration as 'orgyia', but this transliteration is very rare and now out of standard use.

  1. 1 orguia = 6 podes (plural from pous, greek's foot)
  2. 1 orguia = 4 cubits (pechys)
  3. 1 orguia = ~1.848 m
  4. 1 orguia = ~6 feet
  5. 1 orguia = ~2 yards

Plethron – πλέθρον

As any agrarian civilisation, the Greeks designed their moderately large unit of length for plot-measuring convenience, called the plethron, just as we now use decametres or chains. Common for plot dimensions, sports grounds, and agricultural land. Used to define arena dimensions and early stadium layouts. Appears in Athenian cadastral (land) records.

  1. 1 plethron = 100 podes (greek's feet)
  2. 1 plethron = ~30.8 m
  3. 1 plethron = ~1.53 chains
  4. 1 plethron = ~33.7 yards
  5. 1 plethron = ~101 feet

Stadion (Stade) – στάδιον (stadia plural)

All of us well knew the stadion! Great, and this is a well-known word thanks to the Greek famously known sporting event, derived from the Olympic Games, where the length standardisation was a critical element of equality for all participants taking part. The stadion, defined by the Greek foot of 600 (podes), equals the stadion length. Used for race lengths (Olympic stadion event). Standard for long-distance measurement in geography, roads, and travel accounts. Referenced by Herodotus, Eratosthenes, and Strabo.

  1. 1 stadion = 600 podes (pous singular, feet)
  2. 1 stadion = 400 cubits (pecheis, forearms)
  3. 1 stadion = 6 plethra (plural from plethron)
  4. 1 stadion = ~184.8 m
  5. 1 stadion = ~202 yards
  6. 1 stadion = ~9.18 chains

Milion (Greek Mile) – μίλιον

All of us heard of Greek myths, and from them we knew they were good in sailing. So how did they measure the sea distances? And those invented the Milion! Used for inter-city distances within Attica. Appears in late Classical & Hellenistic itineraries. Sailor records, myths, and sea-related approximations of distances, navigation calculations as well.

  1. 1 milion = 8 stadia (plural from stadion)
  2. 1 milion = ~1.478 km
  3. 1 milion = ~0.92 mile
  4. 1 milion = ~0.8 nautical mile

Ancient Rome Length Units

Before the measurement system of Rome reached its classical form, the civilisation passed through several stages of development. Its early monarchy was one of them. To read about the monarchy period and Rome’s seven kings, visit our publication [Antique Rome’s Early Stage].

Informally called the Roman Revolution, our authors have explored in detail for our honourable readers the event that marked the failure of the Roman reign. You may read about it in the publication [The Last of the Seven...].

The early Res Publica period is one of the remarkable periods of socio-cultural development in early Roman society. It lasted for about 60 years after the monarchy ended, before the administrative rules evolved into a quasi-state organisation. To trace this period year-by-year, visit our publication [The Foundation of Roman Democracy: The First 62 Years of the Republic].

The event known as the Decemvirate period is very important in the Classical Roman era. We recommend discovering this event here: [The Twelve Tables of Rome].

The cultural background that shaped Rome’s approach to establishing measurement-system standardisations is analysed in our authors’ research. You may explore it in the publication [Rome, Cultural Background Conditioned Its Measurement System].

Many Roman standards were closely related to earlier Greek rules and practices, and the measurement system is not an exception. A lot of interesting facts about Rome await you in the publications listed above, but here we will focus more directly on the Roman system of length units. Below we list all well-attested units of length used in the Roman Empire. In this overview we do not distinguish between the exact dates when these units were introduced, standardised, or later modified. Instead, we simply present them in a clear sequence—from the smallest units to the larger ones.

Digitus

Digitus (“finger”) is the smallest standard Roman unit of length. Used within Vitruvian proportional systems (architectural anthropometry), part of the hierarchy: digitus → palmus → uncia → pes. Markings in digitī appear on brick and tile stamps that follow pes–uncia–digitus ratios.

  1. 1 digitus = 1/16 Pes (foot)
  2. 1 digitus = ~1.85 cm
  3. 1 digitus = ~0.73 inches

Uncia

The Uncia is the second length unit after digitus. In the Roman length-unit hierarchy, the uncia is the foundation of many Roman fractional measures (including the ounce in weight and the inch in later systems). Used to mark brick thickness, tile height, column bases, and moulding profiles. Excavated architectural templates show uncia divisions used in stone-cutting.

  1. 1 uncia = 1/12 pes
  2. 1 uncia = ~2.46 cm
  3. 1 uncia = ~0.97 inches

Palmus (minor/major)

Palmus (palm, handbreadth) is a small Roman unit based on the width of the human hand. Subdivided as a span (expanded palm distance from large finger to fifth finger) and simple width of a human palm. Here we provide values for the so-called span. Used in stone carving, moulding profiles, and brick aligning. Small modules in wall ornamentation often follow palmus minor/major increments. Architectural templates reflect 1–4 uncia block repetitions corresponding to palm widths.

  1. 1 major palmus = 4 unciae (plural of uncia)
  2. 1 major palmus = ~9.85 cm
  3. 1 major palmus = ~3.88 inches

Pes (Roman foot)

Pes (“foot”) is the fundamental Roman unit of length, used across all engineering, surveying, construction, military planning, and daily measurements.

  1. 1 pes = 16 digitī
  2. 1 pes = 12 unciae
  3. 1 pes = 4 palmi (major)
  4. 1 pes = ~26.6 cm
  5. 1 pes = ~10.47 inches
  6. 1 pes = ~0.87 foot

Pertica / Decempeda (measuring rod)

Pertica (often called decempeda, “ten-footer”) is the standard long measuring rod used in Roman surveying, engineering, and land division. Used for establishing straight road segments, checking distances between milestones, measuring depth and width of construction trenches, regulating aqueduct channels and levelled surfaces.

  1. 1 pertica = 10 pes
  2. 1 pertica = 120 unciae
  3. 1 pertica = ~2.96 m
  4. 1 pertica = ~3.24 yards
  5. 1 pertica = ~9.7 feet

Cubitus (cubit)

Cubitus (“forearm”) is a Roman length unit based on the distance from the elbow to the tip of the middle finger, closely aligned with earlier Greek and Near Eastern cubits.

  1. 1 cubitus = 1 pes + ½ pes
  2. 1 cubitus = 18 unciae
  3. 1 cubitus = 24 digitī
  4. 1 cubitus = ~44.4 cm
  5. 1 cubitus = ~1.46 feet
  6. 1 cubitus = ~17.5 inches

Gradus (step)

Gradus (“step”) is the Roman single step, measured from the heel of one foot to the heel of the opposite foot during normal walking.

  1. 1 gradus = 2.5 pes (Roman feet)
  2. 1 gradus = 1/2 passus
  3. 1 gradus = ~74 cm
  4. 1 gradus = ~2.43 feet
  5. 1 gradus = ~0.81 yard

Passus (double step)

Passus is one of the core units of Roman distance measurement, directly tied to marching rhythm and road engineering.

  1. 1 passus = 2 gradus
  2. 1 passus = 5 pes
  3. 1 passus = ~1.48 m
  4. 1 passus = ~4.9 feet (pes)
  5. 1 passus = ~1.62 yards

Actus

Actus is a Roman land-measurement unit used primarily in surveying (agrimensura) during the division of agricultural land.

  1. 1 actus = 12 perticae (each pertica = 10 feet)
  2. 1 actus = 24 passus
  3. 1 actus = 120 Roman feet (pes)
  4. 1 actus = ~35.5 m
  5. 1 actus = ~38.8 yards

Stadium

Stadium (Latin: stadium, Greek: stadion) is a long-distance unit used for athletic tracks and certain large-scale measurements in Roman and Hellenistic contexts. Although Greek and Roman stadium lengths varied slightly by locale, the Romanized standard of ~185 m is well supported archaeologically.

  1. 1 stadium = 6⅔ actus
  2. 1 stadium = 125 passus
  3. 1 stadium = 1/8 Roman mile
  4. 1 stadium = ~185 m
  5. 1 stadium = ~202.32 yards
  6. 1 stadium = ~9.2 chains

Mille Passus (mile)

Mille passus (“a thousand paces”) is the Roman mile, the official long-distance unit used for all Roman roads, administration, military logistics, and geographic measurement.

  1. 1 mile = 5,000 Roman feet (pes)
  2. 1 mile = 1000 passus
  3. 1 mile = ~1.48 km
  4. 1 mile = ~0.92 miles (Imperial)

Indus Length Units

To explore the broader socio-cultural background of the Harappan (Indus) civilisation, please visit our publication [The Shores of the Ind River, and His Brother the Gung River Are Calling Us!...]

The Indus civilisation’s measurement system unification and presentation is not a simple task, because the civilisation consisted of a wide range of kingdoms, with a long time span of their existence, rare real archaeological artefacts, and inconsistent, unsystematic data these artefacts show us. But we took all possible courage we have and list below the units of length firmly accepted by the scientific society as the proven Harappan units of length. Here we should announce a disclaimer. Unfortunately, the original names of the Indus units have not survived to present days, and thus, in describing the Indus measures of length, we employ anthropometric terms widely attested among ancient civilisations — the finger, foot, cubit, step, and related measures.

Indus Finger

The Harappan finger derived based on the artefact known as ivory excavated piece, with marks; lines on the ivory scale show 10 sub-marks per unit. The markers showing us that measurements had been organised in decimal subdivisions from the larger unit.

  1. 1 indus finger = ~3.35 cm
  2. 1 indus finger = ~1.32 inches

Indus Span

This unit is an approximate analogue to other anthropomorphic measures, being roughly equivalent to half a foot and closely related to the span (palm-span). It is also attested through marked divisions on ivory scales; both ivory and shell rulers have been recovered from Lothal and Mohenjo-Daro.

  1. 1 Harappan span = ~5 indus fingers
  2. 1 Harappan (indus) span = ~16.7 cm
  3. 1 indus span = ~6.57 inches

Indus Foot

The Harappan foot is recognised by specialists as the basic Indus unit, much as the cubit served in common practice across other ancient cultures — including Greece, Rome, Sumer, and others. It is derived from the length between marked notches and is attested in the measurements of the Dholavira city plan.

  1. 1 indus foot = ~10 harappan fingers
  2. 1 indus foot = ~2 indus palm-spans
  3. 1 indus foot = ~33.5 cm
  4. 1 indus foot = ~1 foot

Indus Step

The unit we refer to as the ‘step’ (a designation of our own authorship) represents a doubling of the Harappan foot. We maintain that such a unit must have existed, as indicated by the standardised proportions of excavated bricks, whose archaeological attestations consistently show the ratio 1 × 2 × 4 (height × width × length). These proportions demonstrate the following: at the very least, this doubled unit was standardised, together with the single unit, and in all likelihood the subsequent quadruple unit derived from the basic foot.

  1. 1 Indus step = 2 indus feet
  2. 1 indus step = 4 indus palm-spans
  3. 1 indus step = ~67 cm
  4. 1 indus step = ~2 modern feet

Indus Rod

Just as Rome employed the rod as the next unit in its hierarchy after the step (gradus), we likewise adopt the term ‘rod’ to create a semantic parallel with the Indus hierarchy of length units (in accordance with the authors’ terminology).

  1. 1 indus rod = ~8 indus palm-spans
  2. 1 indus rod = ~4 indus feet
  3. 1 indus rod = ~2 indus step
  4. 1 indus rod = ~1.34 m
  5. 1 indus rod = ~4 modern feet

Length units of Ancient China

The Zhou & Qin dynasty socio-cultural background overview, proceed to the article [As we mentioned, our choice of the initial point is taken from well-established states...]

Shang Dynasty: State Structure and Measurements, to see the publication, visit the article...

This is one of those rare lucky situations when the historical records provide researchers with a mostly complete set of artefacts. The civilisation of Ancient China is well documented, and we may confidently list the units of length that were standardised in that period.

Zhi (指)

The zhi unit we may consider as a finger-width; below we provide its relative values. The parameters we use are established as approximate rates and are dated to the Qin dynasty period.

  1. 1 zhi = ~1.9 cm
  2. 1 zhi = ~0.75 inch
  3. 1 zhi = The smallest unit related to the Qin dynasty measurement system of length.
  4. 1 zhi = 1/10 Cun (寸)

Cun (寸)

The second unit in the length-system hierarchy at the Qin dynasty epoch was the cun (寸). In common modern practice, the unit is closely associated with the inch and served as a basis for small crafts and tools.

  1. 1 cun = ~2.3 cm
  2. 1 cun = ~0.9 modern inch
  3. 1 cun = 10 zhi (指)

Chi (尺)

Third length unit in the Chinese hierarchy of length measures used in the Qin epoch, associated with the foot, and serving as a standard Qin ruler unit.

  1. 1 chi = 10 cun
  2. 1 chi = ~23.1 cm
  3. 1 chi = ~9.1 inches

Bu (步)

A widely used unit of length, common in everyday use much as we use the yard or metre today. Nevertheless, it has passed into history, and the term ‘pace’ is now more appropriate to the unit; among specialists the unit has in fact taken this name.

  1. 1 bu = 6 chi
  2. 1 bu = ~1.39 m
  3. 1 bu = ~1.52 yards

Zhang (丈)

The zhang is a comparatively rare unit in use at the Qin dynasty epoch, but it was standardised. We may compare the usage of this unit to the modern fathom in the Imperial system of length. It was applied mostly as a human-scale measure, particularly in architecture.

  1. 1 zhang = 10 chi
  2. 1 zhang = ~2.31 m
  3. 1 zhang = ~7.58 feet
  4. 1 zhang = ~2.53 yards

Li (里)

The Qin-dynasty mile-distance equivalent, used as a road and land-surveying standard; we may call the unit a Chinese mile.

  1. 1 li = 300 bu
  2. 1 li = ~180 zhang
  3. 1 li = ~416 m
  4. 1 li = ~20.67 chains
  5. 1 li = ~455 yards

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