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 3 gallons into cubic feet we have to multiply 3 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

3 gal → V_(ft3)

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

V_(ft3) = 3 gal × 0.1336805555555 ft3

V_(ft3) = 0.4010416666665 ft3

The final result is:

3 gal → 0.4010416666665 ft3

We conclude that 3 gallons is equivalent to 0.4010416666665 cubic feet:

3 gallons = 0.4010416666665 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 2.4935064935075 × 3 gallons.

Another way is saying that 3 gallons is equal to 1 ÷ 2.4935064935075 cubic feet.

Approximate result

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

3 gal ≅ 0.401 ft3

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