How do you convert gallons into cubic meters?

1 U.S. gallon = 3.79 L

1 L occupies a space of ##1 dm^3## (##1 dm^3## measures 10 cm, or approximately 4 in, on each side of the cube.)

It takes 1 000 ##dm^3## to make up ##1 m^3## (Each side of the cube measures 10 dm.)

Therefore:

1 gal (U.S.) = 3.79 x ##10^-3 m^3##

If you are wanting to convert in the opposite direction, ##1 m^3## = 264.17 gal (U.S.), according to the UnitConvertLT app.

For imperial (U.K.) gallons, the conversion is

1 gal (U.K.) = 4.546 L.

The same process would be used for converting it to cubic metres.

If you are wanting to convert in the opposite direction, ##1 m^3## = 219.97 gal (U.K.), according to the UnitConvertLT app.