Conversion formula

The conversion factor from cubic feet to gallons is 7.4805194805226, which means that 1 cubic foot is equal to 7.4805194805226 gallons:

1 ft3 = 7.4805194805226 gal

To convert 138.9 cubic feet into gallons we have to multiply 138.9 by the conversion factor in order to get the volume amount from cubic feet to gallons. We can also form a simple proportion to calculate the result:

1 ft3 → 7.4805194805226 gal

138.9 ft3 → V_(gal)

Solve the above proportion to obtain the volume V in gallons:

V_(gal) = 138.9 ft3 × 7.4805194805226 gal

V_(gal) = 1039.0441558446 gal

The final result is:

138.9 ft3 → 1039.0441558446 gal

We conclude that 138.9 cubic feet is equivalent to 1039.0441558446 gallons:

138.9 cubic feet = 1039.0441558446 gallons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 gallon is equal to 0.00096242300615911 × 138.9 cubic feet.

Another way is saying that 138.9 cubic feet is equal to 1 ÷ 0.00096242300615911 gallons.

Approximate result

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

138.9 ft3 ≅ 1039.044 gal

An alternative is also that one gallon is approximately zero point zero zero one times one hundred thirty-eight point nine cubic feet.

Conversion table

cubic feet to gallons chart

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