Convert US gallon to litre
1 US gallon = 3.785412 litres. Enter any value below for an exact conversion.
1 gal =
3.785412 L
litres
Need the reverse? Convert litre to US gallon →
Formula
1 US gallon = 3.785412 litres litre = US gallons × 3.785412 US gallon = litres × 0.2641721
US gallon to litre conversion table
1 gal3.785412 L
2 gal7.570824 L
3 gal11.35624 L
5 gal18.92706 L
10 gal37.85412 L
20 gal75.70824 L
25 gal94.63529 L
50 gal189.2706 L
100 gal378.5412 L
1000 gal3785.412 L
About converting US gallons to litres
US gallons to litres comes up for fuel, aquariums, and recipes when converting US measures to metric. Multiply gallons by 3.785 to get litres; the US gallon differs from the imperial gallon used in the UK.
Frequently asked questions
How many litres are in a US gallon?
One US gallon equals 3.785412 litres. So 10 US gallons is 37.85412 litres. Use the converter above for any value.
What is the formula to convert US gallons to litres?
1 US gallon = 3.785412 litres litre = US gallons × 3.785412 US gallon = litres × 0.2641721
Is the US gallon-to-litre conversion exact?
Yes. The conversion factor between US gallons and litres is defined exactly, so results are precise — only rounded for display.