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 15.5 cubic inches into gallons we have to multiply 15.5 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

15.5 in3 → V_(gal)

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

V_(gal) = 15.5 in3 × 0.0043290043290138 gal

V_(gal) = 0.067099567099714 gal

The final result is:

15.5 in3 → 0.067099567099714 gal

We conclude that 15.5 cubic inches is equivalent to 0.067099567099714 gallons:

15.5 cubic inches = 0.067099567099714 gallons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 gallon is equal to 14.903225806419 × 15.5 cubic inches.

Another way is saying that 15.5 cubic inches is equal to 1 ÷ 14.903225806419 gallons.

Approximate result

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

15.5 in3 ≅ 0.067 gal

An alternative is also that one gallon is approximately fourteen point nine zero three times fifteen point five 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