EngiRef / Volume conversion
Convert Gallons (US) to Cubic Meters (gal to m³)
1 gal = 0.00378541178 m³. Convert gallons (US) to cubic meters with the exact factor, a common-values table and a free converter.
Conversion factor
m³ = gal × 0.00378541178
1 gal = 0.00378541178 m³
Multiply by 0.00378541178 m³ to go from gallons (US) to cubic meters, or divide by it to come back. The factor and every value below are computed by the same converter that runs at /convert, so this page and the tool cannot disagree.
gal to m³ table
| Gallons (US) (gal) | Cubic Meters (m³) |
|---|---|
| 1 gal | 0.00378541178 m³ |
| 2 gal | 0.00757082357 m³ |
| 5 gal | 0.0189270589 m³ |
| 10 gal | 0.0378541178 m³ |
| 20 gal | 0.0757082357 m³ |
| 50 gal | 0.189270589 m³ |
| 100 gal | 0.378541178 m³ |
Every figure is computed at build time by the site’s own converter from the volume unit registry. For a value that is not listed, put it into the interactive converter.
Frequently asked questions
How many cubic meters are in one gallon (US)?
One gallon (US) is 0.00378541178 m³, so 100 gal is 0.378541178 m³.
What is the formula to convert gallons (US) to cubic meters?
m³ = gal × 0.00378541178. Multiply the value in gallons (US) by 0.00378541178 to get cubic meters.
How do I convert cubic meters back to gallons (US)?
gal = m³ × 264.172052, so 1 m³ is 264.172052 gal. The m³ to gal page carries the same table in that direction.