ACCURATE CONVERSION
US gallons to Liters Converter
Convert US gallons (gal) to liters (L) with a standards-based formula.
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How to convert US gallons to liters
Enter a value in the converter above. The result updates immediately using the relationship below.
FORMULA1 US gallon = 3.78541178 liters
US gallons to Liters conversion table
| US gallons (gal) | Liters (L) |
|---|---|
| 1 | 3.78541178 |
| 5 | 18.92705892 |
| 10 | 37.85411784 |
| 20 | 75.70823568 |
| 50 | 189.2705892 |
| 100 | 378.5411784 |
Common values
For a quick estimate, multiply by the factor above. Use more decimal places when technical work requires additional precision.
Frequently asked questions
How many liters are in one US gallon?
One US gallon equals 3.78541178 liters.
How do you convert US gallons to liters?
Multiply the US gallon value by 3.78541178.
Can I convert liters back to US gallons?
Yes. One liter equals 0.26417205 US gallons; you can also use the swap button.