Conversion formula

The conversion factor from teaspoons to milliliters is 4.92892161458, which means that 1 teaspoon is equal to 4.92892161458 milliliters:

1 tsp = 4.92892161458 ml

To convert 4.5 teaspoons into milliliters we have to multiply 4.5 by the conversion factor in order to get the volume amount from teaspoons to milliliters. We can also form a simple proportion to calculate the result:

1 tsp → 4.92892161458 ml

4.5 tsp → V_(ml)

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

V_(ml) = 4.5 tsp × 4.92892161458 ml

V_(ml) = 22.18014726561 ml

The final result is:

4.5 tsp → 22.18014726561 ml

We conclude that 4.5 teaspoons is equivalent to 22.18014726561 milliliters:

4.5 teaspoons = 22.18014726561 milliliters

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 milliliter is equal to 0.045085363411923 × 4.5 teaspoons.

Another way is saying that 4.5 teaspoons is equal to 1 ÷ 0.045085363411923 milliliters.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that four point five teaspoons is approximately twenty-two point one eight milliliters:

4.5 tsp ≅ 22.18 ml

An alternative is also that one milliliter is approximately zero point zero four five times four point five teaspoons.

Conversion table

teaspoons to milliliters chart

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