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 821 gallons into cubic feet we have to multiply 821 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

821 gal → V_(ft3)

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

V_(ft3) = 821 gal × 0.1336805555555 ft3

V_(ft3) = 109.75173611107 ft3

The final result is:

821 gal → 109.75173611107 ft3

We conclude that 821 gallons is equivalent to 109.75173611107 cubic feet:

821 gallons = 109.75173611107 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 0.0091114731796864 × 821 gallons.

Another way is saying that 821 gallons is equal to 1 ÷ 0.0091114731796864 cubic feet.

Approximate result

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

821 gal ≅ 109.752 ft3

An alternative is also that one cubic foot is approximately zero point zero zero nine times eight hundred twenty-one 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