Conversion formula

The conversion factor from cubic inches to teaspoons is 3.3246753246849, which means that 1 cubic inch is equal to 3.3246753246849 teaspoons:

1 in3 = 3.3246753246849 tsp

To convert 138.5 cubic inches into teaspoons we have to multiply 138.5 by the conversion factor in order to get the volume amount from cubic inches to teaspoons. We can also form a simple proportion to calculate the result:

1 in3 → 3.3246753246849 tsp

138.5 in3 → V_(tsp)

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

V_(tsp) = 138.5 in3 × 3.3246753246849 tsp

V_(tsp) = 460.46753246885 tsp

The final result is:

138.5 in3 → 460.46753246885 tsp

We conclude that 138.5 cubic inches is equivalent to 460.46753246885 teaspoons:

138.5 cubic inches = 460.46753246885 teaspoons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 teaspoon is equal to 0.0021717057761671 × 138.5 cubic inches.

Another way is saying that 138.5 cubic inches is equal to 1 ÷ 0.0021717057761671 teaspoons.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that one hundred thirty-eight point five cubic inches is approximately four hundred sixty point four six eight teaspoons:

138.5 in3 ≅ 460.468 tsp

An alternative is also that one teaspoon is approximately zero point zero zero two times one hundred thirty-eight point five cubic inches.

Conversion table

cubic inches to teaspoons chart

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