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US Gallons to Liters (gal to L) Converter

1 US gallon (gal) = 3.78541 liters (L). To convert US gallons to liters, multiply by 3.78541: 15 gal × 3.78541 = 56.7812 L. Also searched as US gallons to litres.

1 gal = 3.785411784 L
Convert the other way: Liters to US Gallons

Quick facts

How to convert US gallons to liters

  1. Take the value in US gallons.
  2. Multiply it by 3.78541 (the number of liters in one US gallon).
  3. Round the result to the precision you need.
L = gal × 3.78541

Worked example (a car fuel tank): 15 gal × 3.78541 = 56.7812 L.

To convert liters back to US gallons, multiply by 0.264172, or divide by 3.78541.

Source: NIST Handbook 44, Appendix C, and NIST SP 811 (US customary volume units).

US Gallons to Liters conversion table

US Gallons to Liters conversion table
US Gallons [gal]Liters [L]
0.01 gal0.0378541178 L
0.1 gal0.3785411784 L
1 gal3.785411784 L
2 gal7.570823568 L
3 gal11.356235352 L
5 gal18.92705892 L
10 gal37.85411784 L
20 gal75.70823568 L
50 gal189.2705892 L
100 gal378.5411784 L
1000 gal3785.411784 L

gal to L chart from 1 to 100

Liters to US Gallons conversion table

Liters to US Gallons conversion table
Liters [L]US Gallons [gal]
0.01 L0.0026417205 gal
0.1 L0.0264172052 gal
1 L0.2641720524 gal
2 L0.5283441047 gal
3 L0.7925161571 gal
5 L1.3208602618 gal
10 L2.6417205236 gal
20 L5.2834410472 gal
50 L13.2086026179 gal
100 L26.4172052358 gal
1000 L264.1720523581 gal

US Gallons vs Liters

US GallonLiter
SymbolgalL
Equals1 gal = 3.78541 L1 L = 0.264172 gal

What is a US gallon?

A US customary unit equal to 4 quarts. Used in the US for fuel, milk, and paint.

What is a liter?

The common metric unit of volume, equal to one cubic decimeter. The standard volume unit worldwide for beverages and fuel outside the US.

Frequently asked questions

How many liters are in a US gallon?

There are 3.78541 liters in 1 US gallon (1 gal = 3.785411784 L).

How many US gallons are in a liter?

There are 0.264172 US gallons in 1 liter (1 L = 0.2641720524 gal).

How do I convert US gallons to liters?

Multiply the number of US gallons by 3.78541. For example, 10 gal × 3.78541 = 37.8541 L. To convert back, multiply by 0.264172.

What is 10 gal in liters?

10 gal = 37.8541 L.

What is 100 gal in liters?

100 gal = 378.541 L.

Is the conversion exact?

Yes. The factor comes from the official definitions of both units (NIST Handbook 44, Appendix C, and NIST SP 811 (US customary volume units)). Results are shown to up to 10 decimal places; round them to suit your purpose.

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Reviewed by

Dr. Muhammad Amjad Khadim PhD Mathematics

Dr. Muhammad Amjad Khadim holds a PhD in Mathematics. He writes and reviews the guides on pakmath.com and checks every formula, conversion factor and worked example against published standards and official guidance before it goes live. Spotted an error? Tell us and it will be corrected.

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First published 28 October 2026 · Last reviewed 5 November 2026