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 420.9 teaspoons into cups we have to multiply 420.9 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

420.9 tsp → V_(cup)

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

V_(cup) = 420.9 tsp × 0.020833333333319 cup

V_(cup) = 8.7687499999941 cup

The final result is:

420.9 tsp → 8.7687499999941 cup

We conclude that 420.9 teaspoons is equivalent to 8.7687499999941 cups:

420.9 teaspoons = 8.7687499999941 cups

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 cup is equal to 0.11404133998582 × 420.9 teaspoons.

Another way is saying that 420.9 teaspoons is equal to 1 ÷ 0.11404133998582 cups.

Approximate result

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

420.9 tsp ≅ 8.769 cup

An alternative is also that one cup is approximately zero point one one four times four hundred twenty 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