How to convert gallons to liters
Formula: l = gal × 3.78541
Worked example: 5 gal → 5 × 3.78541 = 18.9271 l
A US gallon is exactly 3.785411784 liters. To compare fuel prices, divide the price per gallon by 3.785: gas at $3.50 a gallon costs about $0.92 a liter. A 15 gallon tank holds 56.8 liters.
Gallons to liters conversion chart
| Gallons (gal) | Liters (l) |
|---|---|
| 1 gal | 3.78541 l |
| 2 gal | 7.57082 l |
| 3 gal | 11.3562 l |
| 4 gal | 15.1416 l |
| 5 gal | 18.9271 l |
| 6 gal | 22.7125 l |
| 7 gal | 26.4979 l |
| 8 gal | 30.2833 l |
| 9 gal | 34.0687 l |
| 10 gal | 37.8541 l |
| 12 gal | 45.4249 l |
| 15 gal | 56.7812 l |
| 20 gal | 75.7082 l |
| 25 gal | 94.6353 l |
| 30 gal | 113.562 l |
| 40 gal | 151.416 l |
| 50 gal | 189.271 l |
| 75 gal | 283.906 l |
| 100 gal | 378.541 l |
| 250 gal | 946.353 l |
| 500 gal | 1,892.71 l |
| 1,000 gal | 3,785.41 l |
What is a gallon?
The US gallon is defined as 231 cubic inches, exactly 3.785411784 liters, and holds 4 quarts or 128 fluid ounces. Gasoline, milk, paint and water use in the United States are measured in gallons.
What is a liter?
The liter is the volume of a cube 10 cm on each side, one cubic decimeter. It is the everyday metric unit for drinks, fuel and engine size. One liter is about 1.057 US quarts, or a little more than 4 US cups.