## Conversion formula

The conversion factor from cubic inches to fluid ounces is 0.55411255411377, which means that 1 cubic inch is equal to 0.55411255411377 fluid ounces:

1 in3 = 0.55411255411377 fl oz

To convert 3.9 cubic inches into fluid ounces we have to multiply 3.9 by the conversion factor in order to get the volume amount from cubic inches to fluid ounces. We can also form a simple proportion to calculate the result:

1 in3 → 0.55411255411377 fl oz

3.9 in3 → V(fl oz)

Solve the above proportion to obtain the volume V in fluid ounces:

V(fl oz) = 3.9 in3 × 0.55411255411377 fl oz

V(fl oz) = 2.1610389610437 fl oz

The final result is:

3.9 in3 → 2.1610389610437 fl oz

We conclude that 3.9 cubic inches is equivalent to 2.1610389610437 fluid ounces:

3.9 cubic inches = 2.1610389610437 fluid ounces

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 fluid ounce is equal to 0.46274038461437 × 3.9 cubic inches.

Another way is saying that 3.9 cubic inches is equal to 1 ÷ 0.46274038461437 fluid ounces.

## Approximate result

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

3.9 in3 ≅ 2.161 fl oz

An alternative is also that one fluid ounce is approximately zero point four six three times three point nine cubic inches.

## Conversion table

### cubic inches to fluid ounces chart

For quick reference purposes, below is the conversion table you can use to convert from cubic inches to fluid ounces

cubic inches (in3) fluid ounces (fl oz)
4.9 cubic inches 2.715 fluid ounces
5.9 cubic inches 3.269 fluid ounces
6.9 cubic inches 3.823 fluid ounces
7.9 cubic inches 4.377 fluid ounces
8.9 cubic inches 4.932 fluid ounces
9.9 cubic inches 5.486 fluid ounces
10.9 cubic inches 6.04 fluid ounces
11.9 cubic inches 6.594 fluid ounces
12.9 cubic inches 7.148 fluid ounces
13.9 cubic inches 7.702 fluid ounces