42 liters to US gallons
11.10 gal
42 L = 11.10 gal, or 2 gal 3.10 qt.
US gallons
11.10gal
42 L = 11.10 gal
The short answer
How many US gallons is 42 liters?
42 L = 11.10 gal, which reads as 2 gal 3.10 qt. 1 liter = 0.264172 US gallons, so the working is 42 × 0.264172 = 11.10.
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 42 × 0.264172 = 11.10
42 liters as 2 gal 3.10 qt
A decimal is the right form for a spreadsheet and the wrong one for almost everything else. Split into whole units, 42 L is 2 gal 3.10 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 | 11 | −0.09523 |
| 1 decimal | 11.1 | +0.00477 |
| 2 decimals | 11.10 | +0.00477 |
Round trip: take 11.10 gal back the other way and you land on 42.0181 L — a drift of 0.0181 L. That gap is the rounding, not the conversion.
What 42 L looks like
41 L
A firkin, the cask a British pub cellar is stacked with, is 9 imperial gallons, or 40.91 litres exactly.
Frequently asked questions
What is 42 liters in US gallons?
42 liters is 11.10 US gallons. 1 liter = 0.264172 US gallons, so the working is 42 × 0.264172 = 11.10.
What is 42 liters in gallons and quarts?
2 gal 3.10 qt. A decimal answer such as 11.10 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 11.10 gal?
Rounding to 11.10 gal and converting straight back gives 42.0181 L, a drift of 0.0181 L from the 42 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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