Volume
Imperial gallons to liters
The Imperial gallon was historically the volume of ten pounds of water and is now fixed at 4.54609 L. It is 1.2009499255 times the US gallon, so one US gallon is only 0.8326741846 Imperial gallons.
The Formula
L = gal x 4.54609
The Imperial gallon was historically the volume of ten pounds of water and is now fixed at 4.54609 L. It is 1.2009499255 times the US gallon, so one US gallon is only 0.8326741846 Imperial gallons.
| Symbol | Meaning | Unit | Notes |
|---|---|---|---|
| gal | Volume in Imperial gallons | Imperial gallons | The standard used on some fuel and beverage labels outside the United States. |
| 4.54609 | Liters in one Imperial gallon | liters per gallon | Exact. About 20.095 percent larger than the US factor. |
| L | Volume in liters | liters | Directly comparable with any other metric volume once computed. |
What Each Symbol Means
galImperial gallons
Volume in Imperial gallons
The standard used on some fuel and beverage labels outside the United States.
4.54609liters per gallon
Liters in one Imperial gallon
Exact. About 20.095 percent larger than the US factor.
Lliters
Volume in liters
Directly comparable with any other metric volume once computed.
See It Worked With Real Numbers
A formula on its own does not tell you which number goes where. The how to convert gallons to liters page applies this equation to a concrete case, shows every intermediate step, and names the mistakes that produce a wrong answer even when the algebra is right.
Where This Formula Appears
This equation is the working core of How To Convert Gallons To Liters, filed under Unit Conversion. Every number the guide produces comes from substituting into this one line.