Gallons to Liters (gal to L)
A fast gallons-to-liters calculator – the result updates as you type.
1 gal = 3.785412 L
1 gal = 3.785412 L. Enter a value and get the result instantly. Below you will find the formula and a table of commonly used values.
Formula
L = gal × 3.78541178
gal to L table
| gal | L |
|---|---|
| 1 gal | 3.7854 L |
| 2 gal | 7.5708 L |
| 5 gal | 18.9271 L |
| 10 gal | 37.8541 L |
| 20 gal | 75.7082 L |
| 50 gal | 189.2706 L |
| 100 gal | 378.5412 L |
| 500 gal | 1,892.7059 L |
| 1,000 gal | 3,785.4118 L |
Where it is used
Gallons are converted to litres when reading the tank size of US cars, paint and milk packaging, and fuel prices. For example, a 15 US gallon tank holds about 56.8 l.
A quick mental shortcut
1 US gallon = 3.785412 l. Roughly, multiply by 4 and take off a little: 10 gallons x 4 = 40 l (the exact result is 37.85 l).
Exact examples: 15 x 3.785412 = 56.78 l; 12 gallons = 45.42 l; 0.5 gallon = 1.89 l.
Good to know
The US gallon is defined as 231 cubic inches. The imperial gallon equals 4.54609 l, so the same number means different volumes in different countries.