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 640 teaspoons into cups we have to multiply 640 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

640 tsp → V_(cup)

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

V_(cup) = 640 tsp × 0.020833333333319 cup

V_(cup) = 13.333333333324 cup

The final result is:

640 tsp → 13.333333333324 cup

We conclude that 640 teaspoons is equivalent to 13.333333333324 cups:

640 teaspoons = 13.333333333324 cups

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 cup is equal to 0.075000000000051 × 640 teaspoons.

Another way is saying that 640 teaspoons is equal to 1 ÷ 0.075000000000051 cups.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that six hundred forty teaspoons is approximately thirteen point three three three cups:

640 tsp ≅ 13.333 cup

An alternative is also that one cup is approximately zero point zero seven five times six hundred forty 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