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 1040 cubic inches into gallons we have to multiply 1040 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

1040 in3 → V_(gal)

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

V_(gal) = 1040 in3 × 0.0043290043290138 gal

V_(gal) = 4.5021645021744 gal

The final result is:

1040 in3 → 4.5021645021744 gal

We conclude that 1040 cubic inches is equivalent to 4.5021645021744 gallons:

1040 cubic inches = 4.5021645021744 gallons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 gallon is equal to 0.2221153846149 × 1040 cubic inches.

Another way is saying that 1040 cubic inches is equal to 1 ÷ 0.2221153846149 gallons.

Approximate result

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

1040 in3 ≅ 4.502 gal

An alternative is also that one gallon is approximately zero point two two two times one thousand forty 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