Conversion formula

The conversion factor from teaspoons to cups is 0.020833333333319, which means that 1 teaspoon is equal to 0.020833333333319 cups:

1 tsp = 0.020833333333319 cup

To convert 30.9 teaspoons into cups we have to multiply 30.9 by the conversion factor in order to get the volume amount from teaspoons to cups. We can also form a simple proportion to calculate the result:

1 tsp → 0.020833333333319 cup

30.9 tsp → V_(cup)

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

V_(cup) = 30.9 tsp × 0.020833333333319 cup

V_(cup) = 0.64374999999956 cup

The final result is:

30.9 tsp → 0.64374999999956 cup

We conclude that 30.9 teaspoons is equivalent to 0.64374999999956 cups:

30.9 teaspoons = 0.64374999999956 cups

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 cup is equal to 1.5533980582535 × 30.9 teaspoons.

Another way is saying that 30.9 teaspoons is equal to 1 ÷ 1.5533980582535 cups.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that thirty point nine teaspoons is approximately zero point six four four cups:

30.9 tsp ≅ 0.644 cup

An alternative is also that one cup is approximately one point five five three times thirty point nine teaspoons.

Conversion table

teaspoons to cups chart

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