Conversion formula

The conversion factor from teaspoons to cubic inches is 0.30078124999914, which means that 1 teaspoon is equal to 0.30078124999914 cubic inches:

1 tsp = 0.30078124999914 in3

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

1 tsp → 0.30078124999914 in3

138.5 tsp → V_(in3)

Solve the above proportion to obtain the volume V in cubic inches:

V_(in3) = 138.5 tsp × 0.30078124999914 in3

V_(in3) = 41.65820312488 in3

The final result is:

138.5 tsp → 41.65820312488 in3

We conclude that 138.5 teaspoons is equivalent to 41.65820312488 cubic inches:

138.5 teaspoons = 41.65820312488 cubic inches

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 cubic inch is equal to 0.024004875990504 × 138.5 teaspoons.

Another way is saying that 138.5 teaspoons is equal to 1 ÷ 0.024004875990504 cubic inches.

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 teaspoons is approximately forty-one point six five eight cubic inches:

138.5 tsp ≅ 41.658 in3

An alternative is also that one cubic inch is approximately zero point zero two four times one hundred thirty-eight point five teaspoons.

Conversion table

teaspoons to cubic inches chart

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