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 640 cubic feet into gallons we have to multiply 640 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

640 ft3 → V_(gal)

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

V_(gal) = 640 ft3 × 7.4805194805226 gal

V_(gal) = 4787.5324675344 gal

The final result is:

640 ft3 → 4787.5324675344 gal

We conclude that 640 cubic feet is equivalent to 4787.5324675344 gallons:

640 cubic feet = 4787.5324675344 gallons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 gallon is equal to 0.00020887586805547 × 640 cubic feet.

Another way is saying that 640 cubic feet is equal to 1 ÷ 0.00020887586805547 gallons.

Approximate result

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

640 ft3 ≅ 4787.532 gal

An alternative is also that one gallon is approximately zero times six hundred forty 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