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 72 cubic inches into gallons we have to multiply 72 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

72 in3 → V_(gal)

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

V_(gal) = 72 in3 × 0.0043290043290138 gal

V_(gal) = 0.311688311689 gal

The final result is:

72 in3 → 0.311688311689 gal

We conclude that 72 cubic inches is equivalent to 0.311688311689 gallons:

72 cubic inches = 0.311688311689 gallons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 gallon is equal to 3.2083333333263 × 72 cubic inches.

Another way is saying that 72 cubic inches is equal to 1 ÷ 3.2083333333263 gallons.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that seventy-two cubic inches is approximately zero point three one two gallons:

72 in3 ≅ 0.312 gal

An alternative is also that one gallon is approximately three point two zero eight times seventy-two 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