Liters to Gallons Converter
Convert liters (L) to US gallons (gal) instantly. Type a value — the result updates as you type, and the swap button converts the other way.
Liters to Gallons formula
gal = L ÷ 3.785411784
1 liter = 0.2642 US gallons · 1 US gallon = 3.79 liters
To convert liters to US gallons, divide the value by 3.785411784. For example, 20 L:
gal = 20 ÷ 3.785411784gal = 5.283441
So 20 L = 5.28 gal.
Mental math shortcut
Quick mental estimate: multiply by 0.26 (a little over a quarter). For 20 L that gives about 5.2 gal — off by 0.0834 gal (1.6%). Use the exact formula when precision matters.
Liters to Gallons conversion table
Gallons back to Liters
The same values converted the other way, rounded for everyday use:
| US gallons | Liters |
|---|---|
| 0.2642 gal | 1 L |
| 0.5283 gal | 2 L |
| 1.06 gal | 4.01 L |
| 1.32 gal | 5 L |
| 2.64 gal | 9.99 L |
| 5.28 gal | 19.99 L |
| 6.6 gal | 24.98 L |
| 13.21 gal | 50.01 L |
About the units
Liters (L)
A liter is 1,000 milliliters (one cubic decimeter). It is the standard metric unit for drinks, fuel and containers.
US gallons (gal)
A US gallon is 128 US fluid ounces, exactly 3.785411784 liters. (The UK imperial gallon is 4.546 liters.)
Frequently asked questions
How many US gallons are in a liter?
One liter equals 0.2642 US gallons.
What is 20 Liters in Gallons?
20 L = 5.28 gal.
How do I convert Gallons back to Liters?
Multiply the US gallons by 3.785411784. Or use the Gallons to Liters converter.