Gallons to Litres Converter
Convert US gallons to litres in your browser, with a full reference table and the formula behind it. Free, instant, no sign-up.
How to convert US gallons to litres
litres = US gallons × 3.7854
One US gallon is 3.7854 litres, so any conversion is a single multiplication. To go the other way, divide by 3.7854 instead. The converter above is already set to US gallons and litres, so you can type any value and read the answer straight away.
Gallons to Litres conversion table
Common values, worked out in advance:
| Us gallons (US gal) | Litres (L) |
|---|---|
| 1 US gal | 3.7854 L |
| 2 US gal | 7.5708 L |
| 3 US gal | 11.3562 L |
| 5 US gal | 18.9271 L |
| 10 US gal | 37.8541 L |
| 20 US gal | 75.7082 L |
| 25 US gal | 94.6353 L |
| 50 US gal | 189.2706 L |
| 100 US gal | 378.5412 L |
The quick mental version
For a rough answer without a calculator, remember that 1 L is about 0.264172 US gal. That is usually close enough for shopping, travel and DIY, and the converter above gives you the exact figure when it matters.
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Frequently asked questions
How many litres are in 1 US gal?
One US gal is 3.7854 L. The table above covers the values people look up most often.
What is the formula to convert US gallons to litres?
litres = US gallons × 3.7854. One US gallon is 3.7854 litres, so any conversion is a single multiplication. To go the other way, divide by 3.7854 instead.
Is this gallons to litres converter accurate?
Yes. It uses the exact internationally defined conversion factors and calculates in your browser, so nothing is rounded until the result is displayed.
Can I convert litres back to US gallons here?
Yes. Use the swap button in the converter to reverse the direction, or pick any other pair of units from the two dropdowns.