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 688 cubic feet into gallons we have to multiply 688 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

688 ft3 → V_(gal)

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

V_(gal) = 688 ft3 × 7.4805194805226 gal

V_(gal) = 5146.5974025995 gal

The final result is:

688 ft3 → 5146.5974025995 gal

We conclude that 688 cubic feet is equivalent to 5146.5974025995 gallons:

688 cubic feet = 5146.5974025995 gallons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 gallon is equal to 0.00019430313307486 × 688 cubic feet.

Another way is saying that 688 cubic feet is equal to 1 ÷ 0.00019430313307486 gallons.

Approximate result

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

688 ft3 ≅ 5146.597 gal

An alternative is also that one gallon is approximately zero times six hundred eighty-eight 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