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 30 gallons into cubic feet we have to multiply 30 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

30 gal → V_(ft3)

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

V_(ft3) = 30 gal × 0.1336805555555 ft3

V_(ft3) = 4.010416666665 ft3

The final result is:

30 gal → 4.010416666665 ft3

We conclude that 30 gallons is equivalent to 4.010416666665 cubic feet:

30 gallons = 4.010416666665 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 0.24935064935075 × 30 gallons.

Another way is saying that 30 gallons is equal to 1 ÷ 0.24935064935075 cubic feet.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that thirty gallons is approximately four point zero one cubic feet:

30 gal ≅ 4.01 ft3

An alternative is also that one cubic foot is approximately zero point two four nine times thirty 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