bath (biblical volume)
Mesopotamia / Levant · Antiquity
bath (biblical volume) is a volume measurement concept whose value depends on the named historical, regional, textual, or commodity variant.
variantdisputedMore from Mesopotamia / Levant →Scaleidoscope — measurement converter and explorer of historical, scientific and unusual units
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Measurement of the day
attoparsec
The Jargon File notes a delightful coincidence: an attoparsec is about an inch, and one attoparsec per microfortnight is about one inch per second.
Jargon File: 10^-18 parsec, about 3.1 cm.
Read the record →- Dimension
- length
- Region
- Various
- Era
- Modern
- Certainty
- Informal / humorous mathematically defined
informal
When a mountain becomes a volume problem
When a mountain becomes a volume problem
Mount St. Helens' 1980 debris avalanche was about one million Olympic-pool reference volumes.
USGS estimates the debris avalanche at about 2.5 km³.
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.
- 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 → - ephah1 documented definitionsvariant
ephah is a volume measurement concept whose value depends on the named historical, regional, textual, or commodity variant.
- Biblical ephah (common scholarly reconstruction)Mesopotamia / Levant · Antiquity
- bath (biblical volume)1 documented definitionsvariantdisputed
bath (biblical volume) is a volume measurement concept whose value depends on the named historical, regional, textual, or commodity variant.
- Biblical bath (common scholarly reconstruction)Mesopotamia / Levant · Antiquity
- dunam2 documented definitionsvariant
Modern Turkish dönüm/decare is 1000 m²; Ottoman Palestine reference ≈919.3 m².
- Ottoman dunam (Palestine reference)Europe · Historical
- Metric dunam / modern dönümEurope · Historical
- tokooGold Coast / Akan-European trade · historicalvariant
Historical museum sources record eight tokoo to one ackie in Gold Coast gold/currency reckoning.
Why historians disagree → - pous (Greek foot)Ancient Greek · Archaic–Hellenisticvariant
Attic ≈0.296 m; Olympic ≈0.320 m; Aeginetan ≈0.333 m
Why historians disagree →
Antiquity
Measured before there were standards
Rebuilt from surviving rods, temple walls and market weights — with the uncertainty left in.
Roman mile (mille passus)
Ancient Greece / Rome · Antiquity
One Roman mile (mille passus) is understood to be about 1,480 metres.
approx.More from Ancient Greece / Rome →ratti
South Asian traditional · Ancient to modern jewelry traditions
A historical jewellers' convention documented by the Science Museum uses 1.75 grains, about 0.113 g; literal seed masses and other conventions should not be silently equated to it.
rangeMore from South Asian traditional →Ezekiel long cubit
Mesopotamia / Levant · Antiquity
One Ezekiel long cubit is understood to be about 0.5186 metres.
approx.More from Mesopotamia / Levant →Mesopotamian talent (later reference standard)
Mesopotamia / Levant · Antiquity
One Mesopotamian talent (later reference standard) is understood to be about 29.988 kilograms.
approx.More from Mesopotamia / Levant →cubit (biblical)
Mesopotamia / Levant · Antiquity
cubit (biblical) is a length measurement concept whose value depends on the named historical, regional, textual, or commodity variant.
variantMore from Mesopotamia / Levant →Precision
The measurements we stopped arguing about
Fixed by international agreement and constants of nature. Exactly exact.
Creativity
Strange & wonderful
Units invented by students, engineers, reindeer herders and jokers — recorded here with the same honesty as the metre.
Beard-second (5 nm convention)
At 5 nm, one metre contains 200 million beard-seconds.
Yes, that is really the name.
informalknot
A knot is a speed, not a distance; saying 'knots per hour' for ordinary speed is dimensionally wrong.
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-onlymile per hour
1 mph = exactly 1.609344 km/h.
Yes, that is really the name.
informalporonkusema
The name literally describes a reindeer's biology: a poronkusema is the distance a draught reindeer travels without urinating.
Someone actually measured this.
approx.informalbeard-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.
variantinformalmicromort
Micromorts make very different hazards comparable on the same one-in-a-million risk scale.
Someone actually measured this.
informalEvery measurement humans have agreed on — and the ones they never did.
392 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.
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measurements, sorted by what they physically measure — length, mass, time, and everything humans argued about in between.
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