Convert US gallons to litres
Enter a value in US gallons (US gal) to get litres (L). One US gallon is 3.7854 litres; one litre is 0.264172 US gallons.
How to use the US gallon to litre
- Type the number of US gallons.
- Click Convert.
- Read the result in litres, plus the same value in every other volume unit.
US gal to L formula
litres = US gallons × 3.7854. To go the other way, US gallons = litres × 0.264172 (see litres to US gallons).
Worked example
12 US gal × 3.7854 = 45.4249 L.
US gallons to litres conversion table
| US gallons | Litres |
|---|---|
| 0.1 US gal | 0.378541 L |
| 0.5 US gal | 1.8927 L |
| 1 US gal | 3.7854 L |
| 2 US gal | 7.5708 L |
| 3 US gal | 11.3562 L |
| 5 US gal | 18.9271 L |
| 10 US gal | 37.8541 L |
| 20 US gal | 75.7082 L |
| 25 US gal | 94.6353 L |
| 50 US gal | 189.2706 L |
| 100 US gal | 378.5412 L |
| 250 US gal | 946.3529 L |
| 500 US gal | 1,892.71 L |
| 1,000 US gal | 3,785.41 L |
About the US gallon
Exactly 3.785411784 litres. Fuel in the USA.
About the litre
1,000 ml, or one cubic decimetre. Fuel, bottled drinks and engine sizes.
Related conversions
Frequently asked questions
How many litres in a US gallon?
3.7854 litres.
How many US gallons in a litre?
0.264172 US gallons.
Is the factor exact?
The factor 3.7854 is derived from the units' exact definitions; only the display is rounded.
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Last updated 2026-09-23.