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 840 gallons into cubic meters we have to multiply 840 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

840 gal → V_(m3)

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

V_(m3) = 840 gal × 0.0037854118 m3

V_(m3) = 3.179745912 m3

The final result is:

840 gal → 3.179745912 m3

We conclude that 840 gallons is equivalent to 3.179745912 cubic meters:

840 gallons = 3.179745912 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 0.31449053719233 × 840 gallons.

Another way is saying that 840 gallons is equal to 1 ÷ 0.31449053719233 cubic meters.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that eight hundred forty gallons is approximately three point one eight cubic meters:

840 gal ≅ 3.18 m3

An alternative is also that one cubic meter is approximately zero point three one four times eight hundred forty 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