Conversion formula

The conversion factor from gallons to cubic meters is 0.0037854118, which means that 1 gallon is equal to 0.0037854118 cubic meters:

1 gal = 0.0037854118 m3

To convert 20.5 gallons into cubic meters we have to multiply 20.5 by the conversion factor in order to get the volume amount from gallons to cubic meters. We can also form a simple proportion to calculate the result:

1 gal → 0.0037854118 m3

20.5 gal → V_(m3)

Solve the above proportion to obtain the volume V in cubic meters:

V_(m3) = 20.5 gal × 0.0037854118 m3

V_(m3) = 0.0776009419 m3

The final result is:

20.5 gal → 0.0776009419 m3

We conclude that 20.5 gallons is equivalent to 0.0776009419 cubic meters:

20.5 gallons = 0.0776009419 cubic meters

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 cubic meter is equal to 12.886441523978 × 20.5 gallons.

Another way is saying that 20.5 gallons is equal to 1 ÷ 12.886441523978 cubic meters.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that twenty point five gallons is approximately zero point zero seven eight cubic meters:

20.5 gal ≅ 0.078 m3

An alternative is also that one cubic meter is approximately twelve point eight eight six times twenty point five gallons.

Conversion table

gallons to cubic meters chart

For quick reference purposes, below is the conversion table you can use to convert from gallons to cubic meters