Conversion formula

The conversion factor from tablespoons to teaspoons is 3.0000000000122, which means that 1 tablespoon is equal to 3.0000000000122 teaspoons:

1 tbsp = 3.0000000000122 tsp

To convert 420 tablespoons into teaspoons we have to multiply 420 by the conversion factor in order to get the volume amount from tablespoons to teaspoons. We can also form a simple proportion to calculate the result:

1 tbsp → 3.0000000000122 tsp

420 tbsp → V_(tsp)

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

V_(tsp) = 420 tbsp × 3.0000000000122 tsp

V_(tsp) = 1260.0000000051 tsp

The final result is:

420 tbsp → 1260.0000000051 tsp

We conclude that 420 tablespoons is equivalent to 1260.0000000051 teaspoons:

420 tablespoons = 1260.0000000051 teaspoons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 teaspoon is equal to 0.00079365079364757 × 420 tablespoons.

Another way is saying that 420 tablespoons is equal to 1 ÷ 0.00079365079364757 teaspoons.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that four hundred twenty tablespoons is approximately one thousand two hundred sixty teaspoons:

420 tbsp ≅ 1260 tsp

An alternative is also that one teaspoon is approximately zero point zero zero one times four hundred twenty tablespoons.

Conversion table

tablespoons to teaspoons chart

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