Gallons to Liters
Convert gallons (gal) to liters (L). 1 gal = 3.78541 L (and 1 L = 0.26417218 gal). It all runs locally in your browser.
Gallons to Liters table
| Gallons | Liters |
|---|---|
| 0.5 gal | 1.892705 L |
| 1 gal | 3.78541 L |
| 2 gal | 7.57082 L |
| 3 gal | 11.35623 L |
| 5 gal | 18.92705 L |
| 10 gal | 37.8541 L |
| 25 gal | 94.63525 L |
| 50 gal | 189.2705 L |
| 100 gal | 378.541 L |
Where this conversion shows up
US gallon figures — fuel purchases, aquarium and pool sizes, paint coverage, the iconic gallon milk jug — regularly need converting for metric readers. Check whether a British source means imperial gallons (4.546 L) before using this page's US factor.
Worked example
Filling a 15-gallon tank: 15 × 3.78541 = 56.8 liters. At $3.50 per gallon that's the same as about $0.92 per liter — converting the price per unit is often the real question.
Rounding and precision
Whole liters are fine for tanks and jugs. Mental shortcut: multiply by 4 and take off 5% — 10 gal → 40 − 2 = 38 L (exact: 37.9).
How to convert
To convert gallons to liters, multiply by 3.78541. Need other units? Use the full Unit Converter.
FAQ
How many liters in a gallon?
1 gallon equals 3.78541 liters (L).
How do I convert gallons to liters?
Multiply the gallons value by 3.78541. For example, 5 gal = 18.92705 L.
How many liters is a gallon of milk?
The US gallon milk jug holds 3.785 liters. The common metric milk sizes, 2 L and 4 L, bracket it — a 4 L jug is about 5.7% more milk.
How do I convert a price per gallon to price per liter?
Divide by 3.78541. Fuel at $3.79 per US gallon is almost exactly $1.00 per liter — a handy coincidence for quick comparisons.