Convert volume units — liters, gallons, cups, milliliters, cubic meters, barrels and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 gal | 3.78541e-06 m³ | |
| 0.01 gal | 3.78541e-05 m³ | |
| 0.1 gal | 0.000378541 m³ | |
| 1 gal | 0.00378541 m³ | |
| 5 gal | 0.0189271 m³ | |
| 10 gal | 0.0378541 m³ | |
| 50 gal | 0.189271 m³ | |
| 100 gal | 0.378541 m³ | |
| 1000 gal | 3.78541 m³ |
Common us gallon values converted to cubic meter — factor: 1 gal = 0.003785 m³
| US Gallon (gal) | Cubic Meter (m³) | Context |
|---|---|---|
| 0.0078 gal | 2.953e-05 m³ | Tablespoon |
| 0.031 gal | 0.0001173 m³ | Quarter cup |
| 0.0625 gal | 0.0002366 m³ | Cup |
| 0.125 gal | 0.0004732 m³ | Pint |
| 0.25 gal | 0.0009464 m³ | Quart |
| 0.5 gal | 0.001893 m³ | Half gallon |
| 1 gal | 0.003785 m³ | Gallon jug |
| 2 gal | 0.007571 m³ | Two gallons |
| 5 gal | 0.01893 m³ | Jerrycan |
| 10 gal | 0.03785 m³ | 10-gallon drum |
| 20 gal | 0.07571 m³ | 20-gallon tank |
| 42 gal | 0.159 m³ | Oil barrel |
| 55 gal | 0.2082 m³ | Drum barrel |
| 100 gal | 0.3785 m³ | Large drum |
| 1,000 gal | 3.785 m³ | Tank |
Converting us gallon to cubic meter comes up frequently in cooking, chemistry, medicine, and engineering. A recipe written in metric units may need to be adapted for a kitchen using cubic meter, or a laboratory protocol may specify volumes in us gallon that need to be measured with equipment calibrated in cubic meter.
In everyday use, knowing that 5 gal = 0.01893 m³ and 10 gal = 0.03785 m³ covers most common situations. For bulk calculations, 100 gal = 0.3785 m³ is a useful anchor. The reverse conversion — cubic meter back to us gallon — uses the factor 264.2, so 1 m³ = 264.2 gal.
All conversions use the internationally recognized factor of exactly 1 gal = 0.003785 m³. Calculations are performed in IEEE 754 double-precision floating point, giving accuracy to at least 8 significant figures — more than sufficient for any practical application.
Formula: Cubic Meter = US Gallon × 0.00378541
Multiply any us gallon value by 0.00378541 to get cubic meter. One us gallon equals 0.00378541 m³.
Reverse: US Gallon = Cubic Meter × 264.17218
1 gal = 0.00378541 m³. Memorize this for instant mental estimates.
Use 0.0038 as a quick mental factor. Multiply your US gallons value by this to estimate cubic meters.
To verify: multiply your result by 264.17218 to recover the original gal value.
Prices fuel in USD per gallon and tracks daily sales volume in thousands of gallons.
Calculates pesticide and fertilizer application rates in gallons per acre.
Measures pool volume in gallons to calculate chlorine and pH chemical dosages.
Purchases engine oil, transmission fluid, and coolant in quart and gallon containers.
Estimates coverage (one US gallon covers about 350 sq ft) and quotes by the gallon.
Specifies water heater tank capacity (40, 50, 80 gallons) for residential systems.
The US liquid gallon is defined as exactly 231 cubic inches, or 3.785411784 liters. It traces its origins to the Queen Anne wine gallon of 1707, which American colonies adopted.
The US gallon differs from the UK Imperial gallon by about 16.5%. This matters for fuel economy: a US MPG figure is lower than the equivalent UK MPG for the same car.
Interesting fact: The United States, Liberia, and Myanmar are the only countries using the US gallon as a primary everyday volume unit.
The cubic meter is the SI derived unit of volume, formally defined in 1960 at the 11th General Conference on Weights and Measures. It equals 1,000 liters or 1,000,000 milliliters.
Cubic meters are standard for large-scale volumes: natural gas is sold in m³, swimming pools are measured in m³, and bulk shipping containers are rated by cubic meter capacity.
Interesting fact: One cubic meter of water at 4°C weighs exactly 1,000 kg. The Pacific Ocean contains roughly 7.1 × 10²⁰ cubic meters of water.