Gallon (US) to Liter Converter (gal to L)
1 gallon (us) = 3.78541 liter. This page uses the US liquid gallon, which is exactly 3.785411784 liters.
Result
15 gal = 56.78115 L
How to convert gallon (us) to liter
This page uses the US liquid gallon, which is exactly 3.785411784 liters. It is the unit for fuel, milk and paint in the US. The UK imperial gallon is different at about 4.546 liters.
Formula
L = gal × 3.78541
Worked example
15 gal × 3.78541 = 56.7812 L
Gallon (US) to Liter quick-reference table
| Gallon (US) (gal) | Liter (L) |
|---|---|
| 0.5 gal | 1.89271 L |
| 1 gal | 3.78541 L |
| 5 gal | 18.9271 L |
| 10 gal | 37.8541 L |
| 15 gal | 56.7812 L |
| 25 gal | 94.6352 L |
Real-life examples
A car with a 15 gallon fuel tank holds about 56.8 L, and a gallon of milk is 3.785 L. Helpful for comparing fuel prices per gallon and per liter.
Frequently asked questions
How many liters are in a US gallon?
One US liquid gallon is 3.78541 liters.
Is a UK gallon the same as a US gallon?
No. A UK (imperial) gallon is about 4.546 L, roughly 20 percent larger than the 3.785 L US gallon.
How many liters is half a gallon?
Half a gallon is 1.8927 liters.
What is 1 gallon (us) in liter?
1 gallon (us) = 3.78541 liter (gal to L).
What is the formula to convert gal to L?
L = gal × 3.78541. For example, 15 gal × 3.78541 = 56.7812 L.
How do I convert L back to gal?
Use the reverse converter: 1 liter = 0.264172 gallon (us). Check: 56.7812 L converts back to 15 gal.
Reverse conversion
Need the other direction? Liter to Gallon (US) converter (L to gal): 1 liter = 0.264172 gallon (us).
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