Convert imperial gallons to Koku (石)
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 imperial gallon = 0.0252015 Koku (石)
Koku (石) = imperial gallons × 0.025201452
Convert any amount
imperial gallons to Koku (石) table
| imperial gallons | Koku (石) |
|---|---|
| 0.25 imperial gallons | 0.00630036 Koku (石) |
| 0.5 imperial gallons | 0.0126007 Koku (石) |
| 1 imperial gallon | 0.0252015 Koku (石) |
| 2 imperial gallons | 0.0504029 Koku (石) |
| 3 imperial gallons | 0.0756044 Koku (石) |
| 4 imperial gallons | 0.100806 Koku (石) |
| 5 imperial gallons | 0.126007 Koku (石) |
| 10 imperial gallons | 0.252015 Koku (石) |
| 20 imperial gallons | 0.504029 Koku (石) |
| 25 imperial gallons | 0.630036 Koku (石) |
| 50 imperial gallons | 1.26007 Koku (石) |
| 100 imperial gallons | 2.52015 Koku (石) |
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 If your figure came from a land record, invoice or historical document rather than a calculator, check these before assuming a single standard.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 Koku (石) are in a imperial gallon?
1 imperial gallon = 0.0252015 Koku (石). Multiply the number of imperial gallons by 0.025201452 to get Koku (石).
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 imperial gallons to Koku (石). UnitConvertLab. Retrieved from https://unitconvertlab.com/regional/imperial-gallon-to-koku
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