Convert US gallons to litres
1 gal = 3.79 L. Type any value below for an instant conversion.
1 gal = 3.79 L
Formula
L = gal × 3.785411784Worked example: 15 gal × 3.785411784 = 56.78 L
A typical US car fuel tank holds 12–16 gallons, or roughly 45–60 litres. Multiply gallons by 3.8 for a close mental estimate.
US gallons to litres conversion table
| US gallons (gal) | litres (L) |
|---|---|
| 1 gal | 3.79 L |
| 2 gal | 7.57 L |
| 5 gal | 18.93 L |
| 10 gal | 37.85 L |
| 12 gal | 45.42 L |
| 15 gal | 56.78 L |
| 20 gal | 75.71 L |
| 25 gal | 94.64 L |
| 50 gal | 189.27 L |
| 100 gal | 378.54 L |
Frequently asked questions
How many litres are in one US gallon?
One US gallon equals 3.79 litres.
How do I convert US gallons to litres?
Multiply the number of US gallons by 3.785411784. For example, 15 gal × 3.785411784 = 56.78 L.
Is this gal to L conversion exact?
The conversion factor of 3.785411784 is used at full floating-point precision and rounded only for display, so the result is accurate for scientific, engineering and everyday use.
What is the reverse conversion?
To go the other way, use the L to gal converter. The reverse factor is 0.2641720524.
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