Gallons to Liters Converter
Convert US gallons to liters instantly: 1 gal = 3.785411784 L. Formula, imperial-gallon note and a gallons to liters chart for fuel, water and aquariums.
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How to use it
- Type a value in the us gallons box.
- The result in litres appears instantly.
- Type in the second box to convert the other way.
Formula
L = gal × 3.785411784. Type in either box — the conversion works both ways.
Gallons to Liters: chart
| US gallons (gal) | Litres (L) |
|---|---|
| 0.5 US gal | 1.89 L |
| 1 US gal | 3.79 L |
| 2 US gal | 7.57 L |
| 3 US gal | 11.36 L |
| 5 US gal | 18.93 L |
| 10 US gal | 37.85 L |
| 12 US gal | 45.42 L |
| 15 US gal | 56.78 L |
| 20 US gal | 75.71 L |
| 50 US gal | 189.27 L |
| 55 US gal | 208.2 L |
| 100 US gal | 378.54 L |
Frequently asked questions
How many liters in a gallon?
A US gallon is exactly 3.785411784 litres; an imperial (UK) gallon is exactly 4.54609 litres.
What is 5 gallons in liters?
5 US gallons is 18.93 L — the size of a common water-cooler bottle.
What is half a gallon in liters?
0.5 US gal is 1.89 L.
How do I estimate quickly?
Multiply by 3.8: 10 gal ≈ 38 L (exact: 37.85 L).