Convert Gallons to Liters – Volume Converter
Use this converter to move seamlessly between us gallon and liter with instant precision.
Interactive Converter
Convert between us gallon and liter with precision rounding.
Quick reference table
| US Gallon | Liter |
|---|---|
| 1 gal | 3.7854 L |
| 5 gal | 18.9271 L |
| 10 gal | 37.8541 L |
| 25 gal | 94.6353 L |
| 50 gal | 189.2706 L |
| 100 gal | 378.5412 L |
How to use this US Gallon converter
- 1. Enter the value you want to convert in the first input field. You can type decimals or whole numbers.
- 2. The result updates instantly with our high-precision formulas, rounding to sensible decimal places for practical use.
- 3. Use the swap button to reverse the calculation and move from liter back to us gallon.
Conversion formula explained
To convert us gallon to liter, multiply the input value by the precise conversion factor derived from international measurement standards. The formula looks like this:
L = (gal × 3.78541178)
We compute the factor using the SI base unit as the truth source to guarantee accuracy even across chained conversions (e.g., meters → feet → inches).
Expert Q&A
What is the exact formula for us gallon to liter?
Multiply your value in us gallon by 3.78541178 to obtain the equivalent in liter.
Can I convert liter back to us gallon?
Yes. Hit the swap button in the converter to reverse the calculation or multiply your liter value by 0.26417205 to switch back.
How accurate is this converter?
We anchor every conversion to internationally recognized base units. The calculator rounds to sensible decimals for readability, but core math runs at double precision.