Cubic Metres to Gallons Converter
Convert cubic metres to US gallons — 264.17 gallons to the cubic metre. Results update as you type; exact factors shown.
One cubic metre is 264.1721 US gallons — see the exact factor, not a rounded rule of thumb.
How the cubic metres to gallons converter works
Volumes convert through the litre (exactly 1 dm³). The US gallon is exactly 3.785411784 L (231 cubic inches); the imperial gallon is exactly 4.54609 L. A US fluid ounce is 29.5735 mL, an imperial fluid ounce 28.4131 mL; a US pint is 16 US fl oz, an imperial pint 20 imperial fl oz.
The UK is metric for most trade and science but keeps miles, pints, stone and mpg (with the imperial gallon) in daily life.
Common volume conversions
| From | To | Units |
|---|---|---|
| 0.1 m³ | 26.4172 US gal | cubic metres to US gallons |
| 0.5 m³ | 132.086 US gal | cubic metres to US gallons |
| 1 m³ | 264.1721 US gal | cubic metre to US gallons |
| 2 m³ | 528.3441 US gal | cubic metres to US gallons |
| 3.785 m³ | 999.8912 US gal | cubic metres to US gallons |
| 5 m³ | 1,320.8603 US gal | cubic metres to US gallons |
| 10 m³ | 2,641.7205 US gal | cubic metres to US gallons |
| 20 m³ | 5,283.441 US gal | cubic metres to US gallons |
| 50 m³ | 13,208.6026 US gal | cubic metres to US gallons |
| 100 m³ | 26,417.2052 US gal | cubic metres to US gallons |
| 500 m³ | 132,086.0262 US gal | cubic metres to US gallons |
| 1,000 m³ | 264,172.0524 US gal | cubic metres to US gallons |
Units in this converter and their exact factors
| Unit | Symbol | One unit in litres |
|---|---|---|
| millilitre | mL | 0.001 litre |
| litre | L | 1 litre |
| cubic metre | m³ | 1,000 litre |
| teaspoon (metric) | tsp | 0.005 litre |
| tablespoon (metric) | tbsp | 0.015 litre |
| cup (metric) | cup | 0.25 litre |
| US fluid ounce | US fl oz | 0.0295735296 litre |
| US cup | US cup | 0.2365882365 litre |
| US pint | US pt | 0.473176473 litre |
| US gallon | US gal | 3.785411784 litre |
| imperial fluid ounce | imp fl oz | 0.0284130625 litre |
| imperial pint | imp pt | 0.56826125 litre |
| imperial gallon | imp gal | 4.54609 litre |
| cubic foot | ft³ | 28.316846592 litre |
FAQFrequently asked questions about volume conversion
How many US gallons in a cubic metre?
264.172.
And imperial gallons?
219.969.
What is 3.785 m³?
One thousand US gallons.
Where does this come up?
Tank sizing, water usage and fuel storage, where capacity is metric and consumption is quoted in gallons.
What is a cubic metre in litres?
Exactly 1,000.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Physical Laboratory (NPL) — United Kingdom's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.