18 liters to US gallons
4.76 gal
18 L = 4.76 gal, or 1 gal 0.76 qt.
US gallons
4.76gal
18 L = 4.76 gal
The short answer
How many US gallons is 18 liters?
18 L = 4.76 gal, which reads as 1 gal 0.76 qt. 1 liter = 0.264172 US gallons, so the working is 18 × 0.264172 = 4.76.
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 18 × 0.264172 = 4.76
18 liters as 1 gal 0.76 qt
A decimal is the right form for a spreadsheet and the wrong one for almost everything else. Split into whole units, 18 L is 1 gal 0.76 qt — the reading you would actually give someone, and the one a tape measure, a scale, or a timetable is marked in.
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 | 5 | +0.24490 |
| 1 decimal | 4.8 | +0.04490 |
| 2 decimals | 4.76 | +0.00490 |
Round trip: take 4.76 gal back the other way and you land on 18.0186 L — a drift of 0.0186 L. That gap is the rounding, not the conversion.
What 18 L looks like
20 L
The NATO-pattern steel jerrycan holds 20 litres, the middle size in a range that also runs 5 and 10 litres.
Frequently asked questions
What is 18 liters in US gallons?
18 liters is 4.76 US gallons. 1 liter = 0.264172 US gallons, so the working is 18 × 0.264172 = 4.76.
What is 18 liters in gallons and quarts?
1 gal 0.76 qt. A decimal answer such as 4.76 gal is the right shape for a form field or a spreadsheet, but the compound form is what a tape measure, a scale, or a schedule actually reads.
How accurate is 4.76 gal?
Rounding to 4.76 gal and converting straight back gives 18.0186 L, a drift of 0.0186 L from the 18 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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