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 308 cubic inches into gallons we have to multiply 308 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

308 in3 → V_(gal)

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

V_(gal) = 308 in3 × 0.0043290043290138 gal

V_(gal) = 1.3333333333363 gal

The final result is:

308 in3 → 1.3333333333363 gal

We conclude that 308 cubic inches is equivalent to 1.3333333333363 gallons:

308 cubic inches = 1.3333333333363 gallons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 gallon is equal to 0.74999999999836 × 308 cubic inches.

Another way is saying that 308 cubic inches is equal to 1 ÷ 0.74999999999836 gallons.

Approximate result

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

308 in3 ≅ 1.333 gal

An alternative is also that one gallon is approximately zero point seven five times three hundred eight 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