Global Fuel CalculatorGallons to Litres Converter
Pumping gas in the US and wondering what that is in litres, or reading a UK tank size quoted in gallons? Choose US or imperial gallons, enter the amount, and get litres instantly. The imperial gallon is roughly 20% larger, so picking the wrong one throws the answer off by a fifth.
Ten US gallons is 37.85 litres; ten imperial gallons is 45.46 litres. Two numbers worth remembering: a US gallon is a little under four litres, and an imperial gallon is a little over four and a half.
Gallons to Litres Converter
The conversion formula
litres = US gallons × 3.785412, or imperial gallons × 4.54609
Worked example: 10 US gal = 37.85 L
Need it the other way round? Use the Litres to Gallons Converter.
Gallons to Litres conversion table
| US gal | L | imp gal |
|---|---|---|
| 1 | 3.79 | 0.83 |
| 5 | 18.93 | 4.16 |
| 10 | 37.85 | 8.33 |
| 12 | 45.42 | 9.99 |
| 15 | 56.78 | 12.49 |
| 20 | 75.71 | 16.65 |
| 25 | 94.64 | 20.82 |
How to use the Gallons to Litres Converter
- Enter your value. Type the figure you want to convert, in US gallons.
- Check the units. Make sure "From" shows US gallons and "To" shows litres. Press Swap to reverse them.
- Read the result. The answer appears straight away, worked out as litres = US gallons × 3.785412, or imperial gallons × 4.54609.
- Check common values. Compare against the conversion table below if you want to sanity-check a figure.
Common questions
How do I convert gallons to litres?
Multiply by 3.785 for US gallons or by 4.546 for imperial gallons.
How many litres is 15 gallons?
About 56.78 litres if they're US gallons, or about 68.19 litres if they're imperial gallons.
Which gallon do American tank sizes use?
The US gallon. A 16-gallon tank holds about 60.6 litres.
Do UK petrol stations sell fuel in gallons?
No. UK fuel is sold by the litre. Gallons live on only in MPG figures, where they mean imperial gallons.