mina (Mesopotamian)
Mesopotamia / Levant · Antiquity
mina (Mesopotamian) is a mass measurement concept whose value depends on the named historical, regional, textual, or commodity variant.
variantMore from Mesopotamia / Levant →Convert familiar measurements into the historical, scientific and unusual
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Measurement of the day
kilogram per cubic metre
Water density is only approximately 1000 kg/m³ and varies with conditions.
kg/m³ is the coherent SI density expression.
Read the record →- Dimension
- density
- Region
- International
- Era
- Modern
- Certainty
- Standardized
exact
Same amount
About 2.1 million 40-oz Stanley Quenchers.
That’s about 2.1 million Quenchers’ worth of nominal liquid capacity, measured against Scaleidoscope’s 2.5-million-litre Olympic-pool reference. It doesn’t mean 2.1 million physical tumblers could be packed into a pool.
Disagreement
Where humans could not agree
A cubit is not a cubit. These records refuse to collapse into one number, so the converter asks you to choose a tradition first.
- Greek mina — conceptAncient Greek · Archaic–Hellenistic and latervariant
Greek systems commonly used 1 mina = 100 drachmas and 1 talent = 60 minae, but absolute mass varied by standard
Why historians disagree → - Earth radiusAstronomy / geodesy · Modern scientific referencevariant
Earth radius is definition-dependent; the cited USGS/WGS84 implementation distinguishes equatorial, polar and authalic mean radii rather than one universal radius.
Why historians disagree → - horsepowerInternational with multiple conventions · Modern/historicalvariant
Mechanical hp ≈ 745.6999 W; metric hp ≈ 735.4988 W; other named conventions also exist
Why historians disagree → - ell3 documented definitionsvariant
Cambridge distinguishes English 45 in, Scottish 37.2 in, Flemish 27 in forms.
- Flemish ellEurope · Historical
- Scottish ellEurope · Historical
- English ellEurope · Medieval / Early modern
- butt1 documented definitionsvariant
Early-17th-century wine context: butt/pipe = 1/2 tun = 2 hogsheads ≈126 old wine gallons.
- English wine butt / pipe (early 17th c. nominal)England / Britain · Medieval / Early modern
- bema (Greek step)Ancient Greek · Classical/Hellenisticapprox.variant
Representative metrological bema = 2.5 local feet
Why historians disagree →
Antiquity
Measured before there were standards
Rebuilt from surviving rods, temple walls and market weights — with the uncertainty left in.
Greek pace
Ancient Greek · Antiquity
approx.reference-onlyMore from Ancient Greek →stadion (Olympia)
Ancient Greece / Rome · Antiquity
Official Olympia and excavation records agree on track length.
approx.More from Ancient Greece / Rome →ephah
Mesopotamia / Levant · Antiquity
ephah is a volume measurement concept whose value depends on the named historical, regional, textual, or commodity variant.
variantMore from Mesopotamia / Levant →Biblical bath (common scholarly reconstruction)
Mesopotamia / Levant · Antiquity
One Biblical bath (common scholarly reconstruction) is understood to be about 0.022 cubic metres.
approx.disputedMore from Mesopotamia / Levant →vitasti
South Asian traditional · Ancient/medieval textual traditions
1 vitasti = 12 aṅgulas; a universal centimetre value should not be assigned without choosing an underlying aṅgula reconstruction.
variantMore from South Asian traditional →Precision
The measurements we stopped arguing about
Fixed by international agreement and constants of nature. Exactly exact.
| South Asian aṅgula (24-aṅgula hasta reference) | — | Length | approx. |
|---|---|---|---|
| calorie (thermochemical) | cal_th | Energy | exact |
| bit | bit | Information | exact |
| specific volume | — | Specific volume | reference-only |
| pascal-second | Pa·s | Viscosity | exact |
| bema (Greek step) | — | Length | approx.variant |
Creativity
Strange & wonderful
Units invented by students, engineers, reindeer herders and jokers — recorded here with the same honesty as the metre.
Sagan
Despite later jokes that try to assign it a number, the hacker Jargon File defines a sagan simply as 'a large quantity of anything'—a deliberately fuzzy tribute to Carl Sagan's cosmic-scale rhetoric.
Yes, that is really the name.
informalreference-onlybeard-second
Its name looks singular, but the historically responsible calculator result is plural: users must choose among documented variants rather than receive one universal conversion.
Yes, that is really the name.
variantinformalshake
Its scale is comparable to the time light takes to travel only a few metres.
Someone actually measured this.
informalBeard-second (10 nm convention)
The 10 nm beard-second is the Physics Handbook convention cited in University of Leipzig mechanics material.
Yes, that is really the name.
informalpotrzebie
Knuth later recalled that MAD paid him $25 for the piece.
Invented for a joke. Documented anyway.
reference-onlySheppey
Sheppey comes from Douglas Adams and John Lloyd's The Meaning of Liff: it is the closest distance at which sheep remain picturesque—approximately seven-eighths of a mile.
Invented for a joke. Documented anyway.
approx.informalBeard-second (5 nm convention)
At 5 nm, one metre contains 200 million beard-seconds.
Yes, that is really the name.
informalEvery measurement humans have agreed on — and the ones they never did.
394 approved records and 21 documented ambiguities. Where the evidence is a range, a reconstruction or a disagreement, Scaleidoscope says so instead of rounding history into a single number.
The whole library
394
measurements, sorted by what they physically measure — length, mass, time, and everything humans argued about in between.
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