15 liters to US gallons
3.96 gal
15 L = 3.96 gal.
US gallons
3.96gal
15 L = 3.96 gal
The short answer
How many US gallons is 15 liters?
15 L = 3.96 gal. 1 liter = 0.264172 US gallons, so the working is 15 × 0.264172 = 3.96.
The working
The factor below is an exact definition rather than a measurement, so nothing is approximated in the arithmetic. The only rounding on this page happens where a number is displayed.
1 liter = 0.264172 US gallons 15 × 0.264172 = 3.96
How much precision do you need?
Each row is the same answer cut at a different number of decimals, with what that choice costs you. Pick the shortest row whose error is smaller than whatever you are measuring with.
| Rounded to | Answer (gal) | Off by |
|---|---|---|
| Whole number | 4 | +0.03742 |
| 1 decimal | 4.0 | +0.03742 |
| 2 decimals | 3.96 | −0.00258 |
Round trip: take 3.96 gal back the other way and you land on 14.9902 L — a drift of 0.0098 L. That gap is the rounding, not the conversion.
Frequently asked questions
What is 15 liters in US gallons?
15 liters is 3.96 US gallons. 1 liter = 0.264172 US gallons, so the working is 15 × 0.264172 = 3.96.
How accurate is 3.96 gal?
Rounding to 3.96 gal and converting straight back gives 14.9902 L, a drift of 0.0098 L from the 15 you started with. The factor itself is exact; every bit of that difference comes from the rounding, not the conversion.
Nearby values
Any value at all
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