12 US gallons to liters
45.42 L
12 gal = 45.42 L.
liters
45.42L
12 gal = 45.42 L
The short answer
How many liters is 12 US gallons?
12 gal = 45.42 L. 1 US gallon = 3.785412 liters, so the working is 12 × 3.785412 = 45.42.
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 12 × 3.785412 = 45.42
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 | 45 | −0.42494 |
| 1 decimal | 45.4 | −0.02494 |
| 2 decimals | 45.42 | −0.00494 |
Round trip: take 45.42 L back the other way and you land on 11.9987 gal — a drift of 0.0013 gal. That gap is the rounding, not the conversion.
What 12 gal looks like
13 gal
Toyota gives the 2025 Corolla a 13.2 gallon tank, dropping to 11.4 gallons on the hybrid.
Frequently asked questions
What is 12 US gallons in liters?
12 US gallons is 45.42 liters. 1 US gallon = 3.785412 liters, so the working is 12 × 3.785412 = 45.42.
How accurate is 45.42 L?
Rounding to 45.42 L and converting straight back gives 11.9987 gal, a drift of 0.0013 gal from the 12 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
Convert US gallons to liters — tanks, recipes, and specs sold in liters.
Open the gallons to liters converter →