Cubic metric volume unit.
Cubic Meters to Gallons Converter — m3 to gal
Convert Cubic Meter (m3) to Gallon (gal) using the exact conversion factor (1 cubic meter = 264.1720524 gallon). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
Cubic Meters to Gallons converter
Converter
Volume Converter
Convert metric, US customary, imperial, cooking, dry, and industrial volume units.
Context values
Some unit families need one extra value for a physically accurate result.
A US liquid gallon is exactly 3.785411784 liters.
Result = input x 1 / 0.003785411784.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Cubic Meters to Gallons
Cubic Meter and Gallon appear side by side at fuel pumps and on beverage labels, since the US measures liquids in gallons while most of the world uses liters. Cubic Meter is typically associated with standard volume unit worldwide for large-scale measurement (construction, shipping, utilities), while Gallon is typically associated with united States (fuel, beverage, and liquid measurement).
Formula
gallons = cubic meters × 264.172052358
This factor comes from each unit's defined relationship to the category's base unit: 1 cubic meter equals 1 base unit, and 1 gallon equals 0.003785411784 base units, so dividing one by the other gives the direct cubic meter-to-gallon factor of 264.172052358.
Simple example
1 m3 × 264.1720524 = 264.1720524 gal
1 cubic meter = 264.1720524 gallons.
Real-world example
10 m3 × 264.1720524 = 2,641.720524 gal
10 cubic meters = 2,641.720524 gallons.
Conversion table
| Cubic Meter (m3) | Gallon (gal) |
|---|---|
| 1 m3 | 264.1720524 gal |
| 5 m3 | 1,320.860262 gal |
| 10 m3 | 2,641.720524 gal |
| 25 m3 | 6,604.301309 gal |
| 50 m3 | 13,208.60262 gal |
| 100 m3 | 26,417.20524 gal |
Reverse conversion: Gallon to Cubic Meter
264.1720524 gal × 0.003785411784 = 1 m3
264.1720524 gallons = 1 cubic meters.
cubic meters = gallons × 0.003785411784
For a page dedicated to this direction, see Gallon to Cubic Meter.
Cubic Meter vs. Gallon
| Aspect | Cubic Meter | Gallon |
|---|---|---|
| Family | SI derived unit | US customary unit |
| Typical use | Concrete, excavation, and construction material volume | Fuel pump and vehicle fuel-economy measurement in the US |
| Where it's used | Standard volume unit worldwide for large-scale measurement (construction, shipping, utilities) | United States (fuel, beverage, and liquid measurement) |
Understanding the Cubic Meter
Cubic Meter (m3) measures volume. The cubic meter is the SI derived unit of volume: the volume of a cube with 1-meter sides. It is classified as a SI derived unit.
Where it's used: Standard volume unit worldwide for large-scale measurement (construction, shipping, utilities)
Uses of the Cubic Meter today
- Concrete, excavation, and construction material volume
- Natural gas and water utility billing in many countries
- Shipping container and freight volume measurement
History of the Cubic Meter
Like the square meter, the cubic meter is a coherent SI derived unit that follows automatically from the meter rather than having an independent origin story of its own.
Historical origin. Cubic Meter was not the invention of a single named person; it developed through the process described above.
Understanding the Gallon
Gallon (gal) measures volume. The US liquid gallon is defined as exactly 231 cubic inches, equal to 3.785411784 liters. It is classified as a US customary unit.
Where it's used: United States (fuel, beverage, and liquid measurement)
US gallon vs. imperial gallon. The US liquid gallon (3.785411784 L) and the British imperial gallon (4.54609 L) are different units with the same name; always confirm which one a source is using.
Uses of the Gallon today
- Fuel pump and vehicle fuel-economy measurement in the US
- Beverage and liquid product packaging in the US
- Cooking and recipe measurement in US customary units
History of the Gallon
The US gallon descends from the English wine gallon of 231 cubic inches, a standard used for measuring wine in medieval and early modern England, which the American colonies inherited and retained even after England moved to a different imperial gallon in 1824.
England's 1824 Weights and Measures Act replaced the old wine gallon with a new imperial gallon (based on 10 pounds of water), but the US kept the older 231-cubic-inch definition — which is why the US gallon (3.785 L) and the imperial gallon (4.546 L) differ by about 20% today.
Historical origin. Gallon was not the invention of a single named person; it developed through the process described above.
Cubic Meter — sources
- BIPM SI Brochure — Coherent derived units — Defines the cubic meter as the SI unit of volume.
Gallon — sources
- NIST Handbook 44, Appendix C — General tables of units of measurement, including the US gallon definition.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many gallons are in 1 cubic meter?
1 cubic meter equals 264.1720524 gallons, using the exact defined conversion factor rather than an estimate.
How do I convert cubic meter to gallon?
Multiply the cubic meter value by 264.1720524. The converter above does this instantly to whatever precision you set.
How do I convert gallon back to cubic meter?
Use the reverse factor: 1 gallon equals 0.0037854118 cubic meters. You can also use the swap control in the converter above to flip the direction instantly.
What is a cubic meter?
Cubic Meter (m3) measures volume. The cubic meter is the SI derived unit of volume: the volume of a cube with 1-meter sides. It is classified as a SI derived unit.
What is a gallon?
Gallon (gal) measures volume. The US liquid gallon is defined as exactly 231 cubic inches, equal to 3.785411784 liters. It is classified as a US customary unit.
Is the cubic meter to gallon conversion exact?
Yes. The US liquid gallon is defined as exactly 231 cubic inches, equal to 3.785411784 liters. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
What is the difference between us gallon vs. imperial gallon?
The US liquid gallon (3.785411784 L) and the British imperial gallon (4.54609 L) are different units with the same name; always confirm which one a source is using.
Where is the cubic meter still used today?
Standard volume unit worldwide for large-scale measurement (construction, shipping, utilities)