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 1.8 cubic inches into gallons we have to multiply 1.8 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

1.8 in3 → V_(gal)

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

V_(gal) = 1.8 in3 × 0.0043290043290138 gal

V_(gal) = 0.0077922077922249 gal

The final result is:

1.8 in3 → 0.0077922077922249 gal

We conclude that 1.8 cubic inches is equivalent to 0.0077922077922249 gallons:

1.8 cubic inches = 0.0077922077922249 gallons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 gallon is equal to 128.33333333305 × 1.8 cubic inches.

Another way is saying that 1.8 cubic inches is equal to 1 ÷ 128.33333333305 gallons.

Approximate result

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

1.8 in3 ≅ 0.008 gal

An alternative is also that one gallon is approximately one hundred twenty-eight point three three three times one point 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