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 300 cubic inches into gallons we have to multiply 300 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

300 in3 → V_(gal)

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

V_(gal) = 300 in3 × 0.0043290043290138 gal

V_(gal) = 1.2987012987041 gal

The final result is:

300 in3 → 1.2987012987041 gal

We conclude that 300 cubic inches is equivalent to 1.2987012987041 gallons:

300 cubic inches = 1.2987012987041 gallons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 gallon is equal to 0.76999999999831 × 300 cubic inches.

Another way is saying that 300 cubic inches is equal to 1 ÷ 0.76999999999831 gallons.

Approximate result

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

300 in3 ≅ 1.299 gal

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