## 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 400 tablespoons into teaspoons we have to multiply 400 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

400 tbsp → V(tsp)

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

V(tsp) = 400 tbsp × 3.0000000000122 tsp

V(tsp) = 1200.0000000049 tsp

The final result is:

400 tbsp → 1200.0000000049 tsp

We conclude that 400 tablespoons is equivalent to 1200.0000000049 teaspoons:

400 tablespoons = 1200.0000000049 teaspoons

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 teaspoon is equal to 0.00083333333332995 × 400 tablespoons.

Another way is saying that 400 tablespoons is equal to 1 ÷ 0.00083333333332995 teaspoons.

## Approximate result

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

400 tbsp ≅ 1200 tsp

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

tablespoons (tbsp) teaspoons (tsp)
401 tablespoons 1203 teaspoons
402 tablespoons 1206 teaspoons
403 tablespoons 1209 teaspoons
404 tablespoons 1212 teaspoons
405 tablespoons 1215 teaspoons
406 tablespoons 1218 teaspoons
407 tablespoons 1221 teaspoons
408 tablespoons 1224 teaspoons
409 tablespoons 1227 teaspoons
410 tablespoons 1230 teaspoons