1 US gallons to liters
3.79 L
1 gal = 3.79 L.
liters
3.79L
1 gal = 3.79 L
The short answer
How many liters is 1 US gallons?
1 gal = 3.79 L. 1 US gallon = 3.785412 liters, so the working is 1 × 3.785412 = 3.79.
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 1 × 3.785412 = 3.79
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 | 4 | +0.21459 |
| 1 decimal | 3.8 | +0.01459 |
| 2 decimals | 3.79 | +0.00459 |
Round trip: take 3.79 L back the other way and you land on 1.0012 gal — a drift of 0.0012 gal. That gap is the rounding, not the conversion.
What 1 gal looks like
1 gal
A US gallon of water weighs about 8.3 lb, or 3.79 kg, since every litre of it is a kilogram.
Frequently asked questions
What is 1 US gallons in liters?
1 US gallons is 3.79 liters. 1 US gallon = 3.785412 liters, so the working is 1 × 3.785412 = 3.79.
How accurate is 3.79 L?
Rounding to 3.79 L and converting straight back gives 1.0012 gal, a drift of 0.0012 gal from the 1 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
Gallons to Liters Converter
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