Gallons to Liters Converter
Convert gallons to liters instantly. Exact formula, quick chart and examples. Free, no signup.
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About the Gallons to Liters Converter
This free gallons to liters converter gives the exact result as you type, with no button to press and no signup. It is built for everyday use in the US: recipes, travel, fitness, weather, school work and shopping. The formula and a quick reference chart are included below so you can check the math yourself.
How to use it
- Type the number of gallons in the first box.
- Read the result in liters immediately below.
- Use the chart on this page for common values you can check at a glance.
Gallons to Liters formula
liters = US gallons × 3.785411784
Example: 10 gal × conversion = 37.854 L.
Quick mental estimate: multiply gallons by 4 and take off 5 %. 10 gallons is about 40 − 2 = 38 L (exact: 37.85 L).
gal to L chart
| Gallons (gal) | Liters (L) |
|---|---|
| 0.5 gal | 1.893 L |
| 1 gal | 3.785 L |
| 2 gal | 7.571 L |
| 5 gal | 18.927 L |
| 10 gal | 37.854 L |
| 12 gal | 45.425 L |
| 15 gal | 56.781 L |
| 20 gal | 75.708 L |
| 26 gal | 98.421 L |
| 50 gal | 189.271 L |
| 100 gal | 378.541 L |
L to gal reverse chart
Going the other way? These are the same values read backwards.
| Liters (L) | Gallons (gal) |
|---|---|
| 1.893 L | 0.5 gal |
| 3.785 L | 1 gal |
| 7.571 L | 2 gal |
| 18.927 L | 5 gal |
| 37.854 L | 10 gal |
| 45.425 L | 12 gal |
| 56.781 L | 15 gal |
| 75.708 L | 20 gal |
| 98.421 L | 26 gal |
| 189.271 L | 50 gal |
| 378.541 L | 100 gal |
About gallons and liters
The US liquid gallon is defined as 231 cubic inches, which is exactly 3.785411784 liters. The imperial gallon used in the UK is larger (4.54609 liters), so check which gallon your source means.
Common uses
- Fuel tank capacity and gas prices abroad (priced per liter).
- Water, paint and aquarium volumes.
- Comparing fuel economy between mpg and L/100 km.
Frequently asked questions
How many liters is 1 US gallon?
1 US gallon is 3.785 liters.
How many liters is a 15-gallon tank?
15 gallons is 56.78 liters, a typical mid-size car fuel tank.
Is a UK gallon the same?
No. An imperial (UK) gallon is 4.546 liters, about 20 % bigger than a US gallon.
How many quarts are in a gallon?
4 quarts make 1 gallon, so 1 quart is 0.946 liters.
What is the formula to convert gallons to liters?
liters = US gallons × 3.785411784. This page applies it for you instantly as you type.
Last reviewed: November 2026.
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