4 US gallons to liters
15.14 L
4 gal = 15.14 L.
liters
15.14L
4 gal = 15.14 L
The short answer
How many liters is 4 US gallons?
4 gal = 15.14 L. 1 US gallon = 3.785412 liters, so the working is 4 × 3.785412 = 15.14.
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 US gallon = 3.785412 liters 4 × 3.785412 = 15.14
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 (L) | Off by |
|---|---|---|
| Whole number | 15 | −0.14165 |
| 1 decimal | 15.1 | −0.04165 |
| 2 decimals | 15.14 | −0.00165 |
Round trip: take 15.14 L back the other way and you land on 3.9996 gal — a drift of 0.0004 gal. That gap is the rounding, not the conversion.
What 4 gal looks like
5 gal
The 20 lb barbecue cylinder is a five gallon tank, filled to about 4.7 gallons to leave room for vapour.
Frequently asked questions
What is 4 US gallons in liters?
4 US gallons is 15.14 liters. 1 US gallon = 3.785412 liters, so the working is 4 × 3.785412 = 15.14.
How accurate is 15.14 L?
Rounding to 15.14 L and converting straight back gives 3.9996 gal, a drift of 0.0004 gal from the 4 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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