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Jewish Volume Converter

Biblical dry and liquid measures, from the log to the kor. Part of the Ancient Measures collection.

How it works

Every unit converts through liters. The scale follows the Encyclopaedia Judaica’s widely cited table: log 0.3, kav 1.2, omer 2.2, hin 3.6, seah 7.3, ephah and bath 22.0, kor 220.0. Dry and liquid series meet at the top: the ephah (dry) and the bath (liquid) are the same volume. Worked example: a mikveh’s minimum of 40 seahs = 40 × 7.3 = 292 L. These are scholarly reconstructions from vessel finds and texts — real jars varied, so treat every value as approximate.

Frequently asked questions

What is the difference between an ephah and a bath?

Almost none in volume: both are about 22 L. The ephah measured dry goods (grain), the bath measured liquids (oil, wine) — Ezekiel 45:11 declares them ‘of one measure.’

How much is an omer?

One-tenth of an ephah, about 2.2 L — the daily manna ration per person in Exodus 16. The modern Omer offering is measured from this.

How big is a kor?

Ten ephahs, about 220 L (58 gallons) — also called a homer. The largest biblical volume unit, used for harvests and royal storehouses.

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Sources & further reading