Unit Converter

Convert US gallons to liters

Convert US gallons to liters. Common for fuel, water containers, and comparing with metric volumes.

1 gal (US) = 3.78541 L

Formula

Convert US gallons to liters with:

L = gal * 3.78541

Example

1 gal = 3.785 L

US gallons to liters table

gal (US)L
0.5 gal (US)1.89271 L
1 gal (US)3.78541 L
2 gal (US)7.57082 L
5 gal (US)18.9271 L
10 gal (US)37.8541 L
20 gal (US)75.7082 L
55 gal (US)208.198 L
100 gal (US)378.541 L
500 gal (US)1892.71 L

Questions

How many liters are in a US gallon?

One US gallon is 3.78541 liters. Enter any value above to convert instantly.

What is the formula to convert US gallons to liters?

Use L = gal * 3.78541. The calculator applies this for every value you type.

Is this conversion exact?

Yes — it uses the standard conversion factor (L = gal * 3.78541), rounded to 6 significant digits for display.

Common conversions

Open the full Unit Converter →

All Volume conversions →