Gallons to Liters converter

Quick reference

Gallons	Liters
1	3.785412
2	7.570824
5	18.927059
10	37.854118
20	75.708236
25	94.635295
50	189.270589
100	378.541178
250	946.352946
500	1,892.705892
1,000	3,785.411784

About volume units

Cooking measures make volume the messiest category: a US cup is 8 fluid ounces (236.6 ml), three teaspoons make a tablespoon, sixteen tablespoons make a cup, and the US gallon (3.785 liters) is smaller than the old imperial gallon (4.546 liters) still implied in some British recipes. Metric kitchens simply use milliliters. When a recipe crosses the Atlantic, converting by weight is more accurate, but for liquids these volume conversions are exact by definition.

More volume conversions

Liters → Gallons Liters → Gallons Milliliters → Fluid Ounces Cups → Milliliters Tablespoons → Milliliters Liters → Milliliters Milliliters → Liters Quarts → Liters All converters

Frequently asked questions

What is the exact formula for Gallons to Liters?

Multiply the Gallons value by 3.78541178. This comes from the exact unit definitions, not a rounded approximation.

Is this conversion exact?

The underlying ratio is exact where a legal definition exists (for example, 1 inch = 25.4 mm exactly). Displayed results are rounded to six decimal places for readability.

Can I convert Liters back to Gallons?

Yes. Use the reverse converter linked below, or just swap which field you type into: the live converter recalculates either direction.