Gallons to Liters converter
1 US gal = 3.785411784 L
US gallons multiplied by 3.785 411 784. Fish tanks, fuel tanks and paint cans are the everyday cases; pick imperial gallons in the converter for UK figures.
5 US gal = 18.92705892 L
Formula: L = US gal × 3.785411784
5 US gal in every volume unit
- millilitre
- litre
- cubic metre
- teaspoon (US)
- tablespoon (US)
- fluid ounce (US)
- cup (US customary)
- cup (US legal, nutrition label)
- cup (metric)
- pint (US liquid)
- quart (US liquid)
- fluid ounce (imperial)
- pint (imperial)
- gallon (imperial)
- cubic inch
- cubic foot
How to convert gallons (US) to litres
L = US gal × 3.785411784
Example: 5 US gal × 3.785411784 = 18.92705892 L.
gallon (US): 1 US gal = 231 in³ = 3.785 411 784 L (NIST Handbook 44, App. C)
litre: 1 L = 1 dm³ = 0.001 m³ (BIPM SI Brochure)
Going the other way? Use the liters to gallons converter.
Where the number 3.7854118 comes from
Nothing is measured here. Every step below is a definition written into law or into the SI.
1 US gal
Gallons to Liters table
| gallons (US) (US gal) | litres (L) |
|---|---|
| 0.25 | 0.9463529 |
| 0.5 | 1.892706 |
| 1 | 3.785412 |
| 2 | 7.570824 |
| 3 | 11.35624 |
| 4 | 15.14165 |
| 5 | 18.92706 |
| 6 | 22.71247 |
| 7 | 26.49788 |
| 8 | 30.28329 |
| 10 | 37.85412 |
| 12 | 45.42494 |
| 15 | 56.78118 |
| 20 | 75.70824 |
| 25 | 94.63529 |
| 30 | 113.5624 |
| 50 | 189.2706 |
| 55 | 208.1976 |
| 100 | 378.5412 |
Questions
How many litres are in 1 gallon (US)?
1 US gal = 3.785411784 L.
What is the formula to convert gallons (US) to litres?
L = US gal × 3.785411784. 1 US gal = 231 in³ = 3.785 411 784 L; 1 L = 1 dm³ = 0.001 m³.
Is this conversion exact?
Yes. Both units are defined exactly (NIST Handbook 44, App. C; BIPM SI Brochure), so the factor is exact and results are only rounded for display.
What is 5 US gal in L?
5 US gal = 18.92705892 L.