Conversion formula

The conversion factor from cubic inches to gallons is 0.0043290043290138, which means that 1 cubic inch is equal to 0.0043290043290138 gallons:

1 in3 = 0.0043290043290138 gal

To convert 720 cubic inches into gallons we have to multiply 720 by the conversion factor in order to get the volume amount from cubic inches to gallons. We can also form a simple proportion to calculate the result:

1 in3 → 0.0043290043290138 gal

720 in3 → V_(gal)

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

V_(gal) = 720 in3 × 0.0043290043290138 gal

V_(gal) = 3.11688311689 gal

The final result is:

720 in3 → 3.11688311689 gal

We conclude that 720 cubic inches is equivalent to 3.11688311689 gallons:

720 cubic inches = 3.11688311689 gallons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 gallon is equal to 0.32083333333263 × 720 cubic inches.

Another way is saying that 720 cubic inches is equal to 1 ÷ 0.32083333333263 gallons.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that seven hundred twenty cubic inches is approximately three point one one seven gallons:

720 in3 ≅ 3.117 gal

An alternative is also that one gallon is approximately zero point three two one times seven hundred twenty cubic inches.

Conversion table

cubic inches to gallons chart

For quick reference purposes, below is the conversion table you can use to convert from cubic inches to gallons