100 US gallons to liters
378.54 L
100 gal = 378.54 L.
liters
378.54L
100 gal = 378.54 L
The short answer
How many liters is 100 US gallons?
100 gal = 378.54 L. 1 US gallon = 3.785412 liters, so the working is 100 × 3.785412 = 378.54.
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 100 × 3.785412 = 378.54
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 | 379 | +0.45882 |
| 1 decimal | 378.5 | −0.04118 |
| 2 decimals | 378.54 | −0.00118 |
Round trip: take 378.54 L back the other way and you land on 99.9997 gal — a drift of 0.0003 gal. That gap is the rounding, not the conversion.
Frequently asked questions
What is 100 US gallons in liters?
100 US gallons is 378.54 liters. 1 US gallon = 3.785412 liters, so the working is 100 × 3.785412 = 378.54.
How accurate is 378.54 L?
Rounding to 378.54 L and converting straight back gives 99.9997 gal, a drift of 0.0003 gal from the 100 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 →