US Gallons to Cubic Meters Converter
1 US gallon ≈ 0.00378541178 cubic meters
About 17% smaller than the imperial gallon used in the UK.
1 US gallon equals 0.00378541 cubic meters
How to convert US gallons to cubic meters
Choose the named US, Imperial or metric unit before converting a recipe or container size. A US liquid gallon is 3.785411784 L; an Imperial gallon is 4.54609 L. Volume alone cannot give ingredient mass without density.
m³ = gal × 0.003785411784One US gallon is 0.003785411784 cubic meters, so a single multiplication converts any value.
0.0378541 m³ ≈ 10 × 0.003785411784About 17% smaller than the imperial gallon used in the UK.
US gallons to cubic meters conversion table
Common values in US gallons, converted to cubic meters.
| US gallons (gal) | Cubic meters (m³) |
|---|---|
| 1 | 0.0037854118 |
| 2 | 0.0075708236 |
| 3 | 0.011356235 |
| 4 | 0.015141647 |
| 5 | 0.018927059 |
| 10 | 0.037854118 |
| 20 | 0.075708236 |
| 25 | 0.094635295 |
| 50 | 0.18927059 |
| 100 | 0.37854118 |
| 250 | 0.94635295 |
| 500 | 1.8927059 |
| 1,000 | 3.7854118 |
About these units
US gallongal
The US liquid gallon: exactly 231 cubic inches, or 3.785411784 litres.
cubic meterm³
The SI derived unit of volume: a cube one metre on each side, or 1,000 litres.
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.