US Gallon to Liter Converter
Convert US Gallon to Liter — free, instant, accurate. Part of Volume converters.
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US Gallon to Liter: values and formula
1 US Gallon = 3.78541 Liter, and 1 Liter = 0.2641721769 US Gallon. To convert a volume value from US Gallon to Liter, multiply it by 3.78541. For example, 10 US Gallon equals 37.8541 Liter, and 250 US Gallon equals 946.3525 Liter.
| US Gallon | Liter |
|---|---|
| 1 US Gallon | 3.78541 Liter |
| 2 US Gallon | 7.57082 Liter |
| 5 US Gallon | 18.92705 Liter |
| 10 US Gallon | 37.8541 Liter |
| 25 US Gallon | 94.63525 Liter |
| 50 US Gallon | 189.2705 Liter |
| 100 US Gallon | 378.541 Liter |
| 500 US Gallon | 1892.705 Liter |
| 1000 US Gallon | 3785.41 Liter |
When to use the US Gallon to Liter converter
- Recipe conversion — cups, millilitres, and fluid ounces for international cooking.
- Fuel economy — comparing miles-per-gallon (US vs imperial) and litres-per-100 km.
- Brewing and bartending — switching pints, half-pints, and millilitres.
- Chemistry and lab work — precise mL-to-cubic-cm conversions.
A short history of volume units
Volume units split into two main families: metric (litre, derived from the cubic decimetre) and imperial (gallon, quart, pint, fluid ounce). The litre was defined in 1795 alongside the metre. The US gallon (231 cubic inches, 3.785 L) and the imperial gallon (4.546 L) diverged after the UK redefined its gallon in 1824, which is why an American pint is 473 mL and a British pint is 568 mL.
Common mistakes when converting volume
US vs imperial gallon
A US gallon is about 16% smaller than an imperial gallon. A car rated 30 US mpg is roughly 36 imperial mpg.
Fluid ounce vs ounce
A fluid ounce is a volume; an ounce is a weight. They are different quantities and only match for water at specific conditions.
Confusing cubic centimetre with millilitre rules of thumb
1 cm³ equals 1 mL exactly — this is by definition, not approximation.
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