Conversion formula

The conversion factor from gallons to cubic feet is 0.1336805555555, which means that 1 gallon is equal to 0.1336805555555 cubic feet:

1 gal = 0.1336805555555 ft3

To convert 1040 gallons into cubic feet we have to multiply 1040 by the conversion factor in order to get the volume amount from gallons to cubic feet. We can also form a simple proportion to calculate the result:

1 gal → 0.1336805555555 ft3

1040 gal → V_(ft3)

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

V_(ft3) = 1040 gal × 0.1336805555555 ft3

V_(ft3) = 139.02777777772 ft3

The final result is:

1040 gal → 139.02777777772 ft3

We conclude that 1040 gallons is equivalent to 139.02777777772 cubic feet:

1040 gallons = 139.02777777772 cubic feet

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 cubic foot is equal to 0.0071928071928102 × 1040 gallons.

Another way is saying that 1040 gallons is equal to 1 ÷ 0.0071928071928102 cubic feet.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that one thousand forty gallons is approximately one hundred thirty-nine point zero two eight cubic feet:

1040 gal ≅ 139.028 ft3

An alternative is also that one cubic foot is approximately zero point zero zero seven times one thousand forty gallons.

Conversion table

gallons to cubic feet chart

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