Convert Koku (石) to imperial gallons
East Asia · East Asian Volume · historical · medieval
Historically reconstructed The unit is no longer in use and its value is reconstructed from historical and scholarly sources — treat it as indicative.
1 Koku (石) = 39.6803 imperial gallons
imperial gallons = Koku (石) × 39.680253
Convert any amount
Koku (石) to imperial gallons table
| Koku (石) | imperial gallons |
|---|---|
| 0.25 Koku (石) | 9.92006 imperial gallons |
| 0.5 Koku (石) | 19.8401 imperial gallons |
| 1 Koku (石) | 39.6803 imperial gallons |
| 2 Koku (石) | 79.3605 imperial gallons |
| 3 Koku (石) | 119.041 imperial gallons |
| 4 Koku (石) | 158.721 imperial gallons |
| 5 Koku (石) | 198.401 imperial gallons |
| 10 Koku (石) | 396.803 imperial gallons |
| 20 Koku (石) | 793.605 imperial gallons |
| 25 Koku (石) | 992.006 imperial gallons |
| 50 Koku (石) | 1,984.01 imperial gallons |
| 100 Koku (石) | 3,968.03 imperial gallons |
About the Koku (石)
Japanese rice measure. Defined feudal wealth. 1 Koku ≈ 180 liters.
- Symbol
- 石
- Value in SI
- 1 Koku (石) = 180.39 litre
- Typical use
- agriculture, trade
- Source
- Edo period standard
Every atlas conversion routes through the SI litre. See our methodology and data provenance pages for how these values are sourced and verified.
Related units and variant risk
Other east asian volume units in the East Asia family, least settled first. If your figure came from a land record, invoice or historical document rather than a calculator, check these before assuming a single standard.
Related conversions
Frequently asked
How many imperial gallons are in a Koku (石)?
1 Koku (石) = 39.6803 imperial gallons. Multiply the number of Koku (石) by 39.680253 to get imperial gallons.
What is Koku (石) used for?
Japanese rice measure. Defined feudal wealth. 1 Koku ≈ 180 liters. It is classified as historical and dates from the medieval period.
Is the Koku (石) value exact?
Yes for practical purposes. UnitConvertLab converts every atlas unit through the SI litre, using the value published by Edo period standard, so the arithmetic itself introduces no rounding beyond the digits shown.
How reliable is this Koku (石) conversion?
Historically reconstructed — The unit is no longer in use and its value is reconstructed from historical and scholarly sources — treat it as indicative. Source: Edo period standard.
Cite this page
UnitConvertLab. (2026). Convert Koku (石) to imperial gallons. UnitConvertLab. Retrieved from https://unitconvertlab.com/regional/koku-to-imperial-gallon
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