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 731 cubic inches into gallons we have to multiply 731 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

731 in3 → V_(gal)

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

V_(gal) = 731 in3 × 0.0043290043290138 gal

V_(gal) = 3.1645021645091 gal

The final result is:

731 in3 → 3.1645021645091 gal

We conclude that 731 cubic inches is equivalent to 3.1645021645091 gallons:

731 cubic inches = 3.1645021645091 gallons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 gallon is equal to 0.31600547195553 × 731 cubic inches.

Another way is saying that 731 cubic inches is equal to 1 ÷ 0.31600547195553 gallons.

Approximate result

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

731 in3 ≅ 3.165 gal

An alternative is also that one gallon is approximately zero point three one six times seven hundred thirty-one 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