Volume
gal (US)tom³
Convert US gallons (gal (US)) to cubic metres (m³).
Factor1 gal (US) = 0.003785412 m³
Converter
gal (US)
Accepts numbers or expressions, e.g. 150 + 14.7
Result
m³
Rendered to 6 significant figures.
Formula
Formula
m³ = gal (US) × 0.003785412
Multiply any value in US gallons by 0.003785412 to obtain the value in cubic metres.
Worked example
Convert 1000 gal (US) to m³.
- 01Start with 1000 gal (US).
- 02Multiply by the conversion factor: 1000 × 0.003785412 = 3.78541 m³.
Result1000 gal (US) = 3.78541 m³
Conversion table
| gal (US) | m³ |
|---|---|
| 1 | 0.0037854 |
| 2 | 0.0075708 |
| 5 | 0.018927 |
| 10 | 0.037854 |
| 20 | 0.075708 |
| 50 | 0.18927 |
| 100 | 0.37854 |
| 200 | 0.75708 |
| 500 | 1.8927 |
| 1000 | 3.7854 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from gal (US) to m³?
1 gal (US) equals 0.003785412 m³. To convert, multiply the value in US gallons by 0.003785412.
How do I convert 1 gal (US) to m³?
1 gal (US) = 0.00378541 m³. For any value, multiply by 0.003785412.
How do I convert m³ back to gal (US)?
Divide by the same factor — or equivalently, multiply by 264.1721. So 1 m³ = 264.172 gal (US).
When would I need to convert US gallon to cubic metre?
Volume conversions are used for tank sizing, batch calculations, and bridging between vendor specs (gallons, barrels, ft³) and process documentation (m³, litres).
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).