US Gallons to Litres
Convert us gallons (gal) to litres (L) instantly — with formula and reference table.
Quick answer: 1 gal = 3.785412 L. To convert us gallons to litres, multiply by gal × 3.785412.
Converting us gallons to litres
This converter changes a value in us gallons (gal) into litres (L). One us gallon equals 3.785412 L. One US gallon equals exactly 3.785411784 litres. Use this for fuel, water and liquid volumes quoted in US gallons. The conversion runs entirely in your browser — enter a value and the result updates instantly, in either direction.
Formula
L = gal × 3.785412
Example
Convert 10 gal to L: 10 × 3.785412 = 37.854118 L.
US Gallons to Litres conversion table
| US Gallons (gal) | Litres (L) |
|---|---|
| 1 gal | 3.785412 L |
| 2 gal | 7.570824 L |
| 3 gal | 11.356235 L |
| 5 gal | 18.927059 L |
| 10 gal | 37.854118 L |
| 20 gal | 75.708236 L |
| 25 gal | 94.635295 L |
| 50 gal | 189.270589 L |
| 100 gal | 378.541178 L |
How to use this converter
- Enter a value in the us gallons (gal) field.
- Read the converted value in litres (L) below.
- Type into the L field instead to convert in reverse, or use the swap button.
Frequently asked questions
How many litres are in a gallon?
1 US gallon equals 3.78541 litres; 1 imperial (UK) gallon equals 4.54609 litres.
How do I convert 15 gallons to litres?
15 × 3.78541 = 56.78 litres (US gallons).
Which gallon does this use?
The US gallon. If you have imperial gallons, multiply by 4.54609 instead.