Gallons to Liters Converter
Convert gallons to litres. Pick US or UK (imperial) gallons first, because they hold different amounts, then enter a value to get litres instantly.
Formula: liters = US gallons × 3.785411784
Common gallons to liters conversions
| Gallons | Liters (from US gal) | Liters (from UK gal) |
|---|---|---|
| 0.5 gal | 1.89271 L | 2.27305 L |
| 1 gal | 3.78541 L | 4.54609 L |
| 2 gal | 7.57082 L | 9.09218 L |
| 3 gal | 11.3562 L | 13.6383 L |
| 5 gal | 18.9271 L | 22.7305 L |
| 10 gal | 37.8541 L | 45.4609 L |
| 12 gal | 45.4249 L | 54.5531 L |
| 15 gal | 56.7812 L | 68.1913 L |
| 20 gal | 75.7082 L | 90.9218 L |
| 50 gal | 189.271 L | 227.305 L |
Need the other direction? Convert liters to gallons or use the full Unit Converter for length, weight, temperature, area, volume and speed.
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How to use gallons to liters converter
- 1Choose US gallons or UK (imperial) gallons.
- 2Enter the number of gallons.
- 3Read the result in litres, or swap to convert the other way.
- 4Check the chart for common amounts in both gallon types.
About this tool
Litres = US gallons × 3.785411784, or UK gallons × 4.54609. Both factors are exact definitions, so 5 US gallons is 18.93 litres and 5 UK gallons is 22.73 litres.
US gallons are used for fuel, milk, water and paint in the United States. The UK imperial gallon is about 20% larger and shows up in British fuel-economy figures and older Canadian and Australian measurements.
If you're not sure which gallon a figure uses, check where it comes from — a US recipe, tank or fuel price uses US gallons. The chart shows both so you can compare.
Frequently asked questions
Exactly 3.785411784 litres — about 3.79 L.
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