Liters to Gallons Converter

How to convert liters to gallons

1 liter = 0.2641720524 gallons. To convert liters to gallons, divide by 3.785411784 (or multiply by 0.2641720524). A liter is one cubic decimeter (1,000 cm³). A US liquid gallon is 231 cubic inches, exactly 3.785411784 L.

Worked examples

• 4 liters = 1.05669 gal (4 ÷ 3.7854118)
• 20 liters = 5.28344 gal (20 ÷ 3.7854118)
• 100 liters = 26.4172 gal (100 ÷ 3.7854118)

Where this conversion comes up

Liters are used for bottled drinks, engine size and fuel outside the US; gallons for gasoline, milk, paint and fish tanks in the US. Typical for fuel, water tanks and aquariums. Results are US gallons (3.785 L); a UK imperial gallon is 4.546 L, so 100 L is 26.4 US gal but 22 imperial gallons.

Quick estimate

Divide by 4 and add 5.7%: 40 L ≈ 10.6 gal, exact 10.57.

Common mistakes

• Multiplying instead of dividing. A gallon is larger than a liter, so the number of gallons must come out smaller: 4 liters = 1.05669 gal.
• Using the imperial (UK) unit. This page uses US measures. An imperial gallon is 4.546 L (20% more than a US gallon), an imperial pint 568 ml and an imperial fluid ounce 28.41 ml.
• Rounding too early. Keep the full factor until the last step; rounding 0.264 to 0.3 first puts large values noticeably off.

Going the other way? Use the gallons to liters converter. Related volume converters: ml to oz, oz to ml, liters to quarts, quarts to liters, gallons to quarts, oz to cups.