Convert US gallons to liters
Converting US gallons to liters is a common volume task, whether you are checking a recipe, a spec sheet, a travel distance or a homework problem. Since 1 gal equals 3.78541 L, the math is a single multiplication — and this page does it for you instantly, with the formula, a table of common values and answers to the questions people ask most.
Exact factor
How to convert US gallons to liters
To convert US gallons to liters, multiply the number of US gallons by 3.78541. For example, 10 gal × 3.78541 = 37.8541 L.
L = gal × 3.78541
- Write down the value in US gallons you want to convert.
- Multiply it by 3.78541 (the exact gal→L factor).
- The result is your value in liters. Check it below with the converter or the table.
Conversion table
Common values of US gallons and their equivalents in liters:
| gal | L |
|---|---|
| 1 | 3.78541 |
| 2 | 7.57082 |
| 3 | 11.3562 |
| 4 | 15.1416 |
| 5 | 18.9271 |
| 10 | 37.8541 |
| 20 | 75.7082 |
| 25 | 94.6353 |
| 50 | 189.271 |
| 100 | 378.541 |
| 250 | 946.353 |
| 500 | 1,892.71 |
About these units
US Gallon (gal). The US liquid gallon is defined as exactly 3.785411784 liters, or 128 US fluid ounces. Fuel economy and milk containers in the United States use gallons.
Liter (L). The liter is the metric standard for everyday volumes, defined as one cubic decimeter. Beverages, fuel and backpack capacities are sold in liters.
Frequently asked questions
How do I convert US gallons to liters?
To convert US gallons to liters, multiply the number of US gallons by 3.78541. For example, 10 gal × 3.78541 = 37.8541 L. Or skip the math: type the value into the converter at the top of this page and the result updates instantly.
How many liters are in 1 us gallon?
1 gal = 3.78541 L. That is the fixed relationship used by this converter and by international standards.
How many US gallons are in 1 liter?
1 L = 0.264172 gal. If you are converting in the opposite direction, use our Liter to US Gallon converter for the dedicated table and FAQ.
Is the US gallons to liters conversion exact?
Yes. Both units are defined by international agreement, so the factor of 3.78541 is exact. Displayed results are rounded to 6 significant digits only for readability.
What is us gallon used for?
The US liquid gallon is defined as exactly 3.785411784 liters, or 128 US fluid ounces. Fuel economy and milk containers in the United States use gallons.