Convert US Gallons to Cubic Meters
Convert US Gallons to Cubic Meters instantly. 1 US Gallon (gal (US)) equals 0.003785 Cubic Meters (m³).
US Gallons to Cubic Meters conversion table
| US Gallons (gal (US)) | Cubic Meters (m³) |
|---|---|
| 1 gal (US) | 0.003785 m³ |
| 2 gal (US) | 0.007571 m³ |
| 3 gal (US) | 0.01136 m³ |
| 5 gal (US) | 0.01893 m³ |
| 10 gal (US) | 0.03785 m³ |
| 20 gal (US) | 0.07571 m³ |
| 50 gal (US) | 0.1893 m³ |
| 100 gal (US) | 0.3785 m³ |
| 500 gal (US) | 1.8927 m³ |
| 1,000 gal (US) | 3.7854 m³ |
1 US Gallon = 0.003785 Cubic Meters · multiply US Gallons by 0.003785
About converting US Gallons to Cubic Meters
US Gallons (gal (US)) and Cubic Meters (m³) are both units of volume, so converting between them is a single multiplication: multiply your US Gallons figure by 0.003785. Ten US Gallons comes to 0.03785 Cubic Meters, and a hundred works out at 0.3785 Cubic Meters.
Rule of thumb: going from US Gallons to Cubic Meters divides, so the figure always shrinks — it takes about 264.1721 US Gallons to make a single Cubic Meter. If your answer came out bigger, you have the conversion the wrong way round.
What is an US Gallon?
The US gallon is defined as exactly 231 cubic inches, a figure inherited unchanged from the old English wine gallon. When Britain overhauled its measures in 1824 and adopted a new imperial gallon, the United States simply kept the wine gallon it already had — and that single decision is the root of the entire US-versus-imperial mess that still catches people out today. The US gallon is roughly a fifth smaller than the imperial one, which means American and British fuel-economy figures are not comparable even though both are quoted in miles per gallon.
What is a Cubic Meter?
The cubic meter is the actual SI unit of volume — the liter is only tolerated alongside it — and it takes over whenever a quantity is too big to picture in bottles. Water utilities bill in cubic meters, gas meters record them, and freight forwarders quote shipping space in them, because a cubic meter of cargo is a meaningful measure of what fits in a container. It is also the trade unit for bulk materials: concrete, topsoil and aggregate are ordered by the cubic meter, and the truck that delivers them is sized in them too.
To put both in perspective: a typical American milk jug holds one US gallon, while a cubic meter is a cube one meter on every side.
The converter above updates as you type, and the table lists common values for quick reference. Need the opposite direction? Use the Cubic Meters to US Gallons converter, or browse all Volume converters.
Frequently asked questions
How many Cubic Meters are in one US Gallon?
There are 0.003785 Cubic Meters in one US Gallon.
How do I convert US Gallons to Cubic Meters?
Multiply the number of US Gallons by 0.003785. For example, 10 US Gallons = 0.03785 Cubic Meters.
What is 100 US Gallons in Cubic Meters?
100 US Gallons is equal to 0.3785 Cubic Meters.
How do I convert Cubic Meters to US Gallons?
Multiply the Cubic Meters value by 264.1721 (or divide by 0.003785).
Is this US Gallons to Cubic Meters conversion exact?
The definition is exact — US Gallons and Cubic Meters are both fixed against the same base by international agreement — but the decimal shown here is rounded for readability, because the true ratio does not terminate. For engineering or scientific work, carry more decimal places than this page displays.
What is an US Gallon?
The US gallon is defined as exactly 231 cubic inches, a figure inherited unchanged from the old English wine gallon. When Britain overhauled its measures in 1824 and adopted a new imperial gallon, the United States simply kept the wine gallon it already had — and that single decision is the root of the entire US-versus-imperial mess that still catches people out today. The US gallon is roughly a fifth smaller than the imperial one, which means American and British fuel-economy figures are not comparable even though both are quoted in miles per gallon.
What is a Cubic Meter?
The cubic meter is the actual SI unit of volume — the liter is only tolerated alongside it — and it takes over whenever a quantity is too big to picture in bottles. Water utilities bill in cubic meters, gas meters record them, and freight forwarders quote shipping space in them, because a cubic meter of cargo is a meaningful measure of what fits in a container. It is also the trade unit for bulk materials: concrete, topsoil and aggregate are ordered by the cubic meter, and the truck that delivers them is sized in them too.