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 81 gallons into cubic feet we have to multiply 81 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

81 gal → V_(ft3)

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

V_(ft3) = 81 gal × 0.1336805555555 ft3

V_(ft3) = 10.828124999996 ft3

The final result is:

81 gal → 10.828124999996 ft3

We conclude that 81 gallons is equivalent to 10.828124999996 cubic feet:

81 gallons = 10.828124999996 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 0.09235209235213 × 81 gallons.

Another way is saying that 81 gallons is equal to 1 ÷ 0.09235209235213 cubic feet.

Approximate result

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

81 gal ≅ 10.828 ft3

An alternative is also that one cubic foot is approximately zero point zero nine two times eighty-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