This converter turns cubic meters into US gallons instantly, using the exact factor 1 cubic meter = 264.1720524 US gallons. Type any number and the result updates as you go — nothing is sent to a server, so the arithmetic happens entirely in your browser.
One thousand litres, the SI-derived unit for large volumes like water tanks and gas supply. Exactly 231 cubic inches — the US liquid gallon used for fuel and milk.
Because the relationship is a simple proportion, one multiplication does the whole job. The table further down gives pre-computed values for the amounts people look up most often, and the result panel also reports the reverse conversion so you can check the figure both ways.
The formula
cubic meters- The amount you are converting, measured in cubic meters
264.1720524- The exact number of US gallons in one cubic meter
US gallons- The converted result
How it works, step by step
- Enter the number of cubic meters you want to convert.
- The value is multiplied by 264.1720524, the exact conversion factor.
- The result is displayed in US gallons, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 cubic meters
Multiply 5 by 264.17205. That gives 1,320.86 US gallons. A quick sanity check: one cubic meter is larger than one US gallon, so the number should get bigger — and it does.
Converting 72 cubic meters
72 × 264.17205 = 19,020.39 US gallons. Working backwards, 19,020.39 ÷ 264.17205 returns 72 cubic meters, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many US gallons are in one cubic meter?
Exactly 264.1720524. Every conversion on this page is that single number multiplied by your input, so the result carries no rounding error beyond what is shown.
What is the formula to convert cubic meters to US gallons?
Us Gallons = cubic meters × 264.1720524. To reverse it, divide instead: cubic meters = US gallons ÷ 264.1720524, which is the same as multiplying by 0.003785411784.
Is the cubic meter bigger than the US gallon?
Yes. One cubic meter equals 264.172 US gallons, so it is the larger unit.
Why does my answer differ slightly from other cubic-meters to us-gallons converters?
Most differences come from rounding the factor too early. This tool keeps full double precision through the calculation and only rounds at the final display step, and it also shows the unrounded value so you can see exactly where any difference appears.
What is a cubic meter?
One thousand litres, the SI-derived unit for large volumes like water tanks and gas supply.
What is a US gallon?
Exactly 231 cubic inches — the US liquid gallon used for fuel and milk.
Cubic Meters to US gallons reference table
| Cubic Meters | Us Gallons |
|---|---|
| 0.5 m³ | 132.086 gal |
| 1 m³ | 264.1721 gal |
| 2 m³ | 528.3441 gal |
| 3 m³ | 792.5162 gal |
| 5 m³ | 1,320.86 gal |
| 10 m³ | 2,641.72 gal |
| 15 m³ | 3,962.58 gal |
| 20 m³ | 5,283.44 gal |
| 25 m³ | 6,604.3 gal |
| 50 m³ | 13,208.6 gal |
| 75 m³ | 19,812.9 gal |
| 100 m³ | 26,417.21 gal |
| 250 m³ | 66,043.01 gal |
| 500 m³ | 132,086.03 gal |
| 1000 m³ | 264,172.05 gal |
Exact factor: 1 cubic meter = 264.1720524 US gallons. Values rounded for display.