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 687.2 cubic feet into gallons we have to multiply 687.2 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

687.2 ft3 → V_(gal)

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

V_(gal) = 687.2 ft3 × 7.4805194805226 gal

V_(gal) = 5140.6129870151 gal

The final result is:

687.2 ft3 → 5140.6129870151 gal

We conclude that 687.2 cubic feet is equivalent to 5140.6129870151 gallons:

687.2 cubic feet = 5140.6129870151 gallons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 gallon is equal to 0.00019452932997017 × 687.2 cubic feet.

Another way is saying that 687.2 cubic feet is equal to 1 ÷ 0.00019452932997017 gallons.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that six hundred eighty-seven point two cubic feet is approximately five thousand one hundred forty point six one three gallons:

687.2 ft3 ≅ 5140.613 gal

An alternative is also that one gallon is approximately zero times six hundred eighty-seven point two 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