21 milliliters in US customary teaspoons

Result

The conversion result is: 21 milliliters is equivalent to 4.26056686043222 US customary teaspoons.^[1]

Conversion formula
How to convert 21 milliliters to US customary teaspoons?

We know (by definition) that: 1 ml ≈ 0.202884136211058 usteaspoon.

We can set up a proportion to solve for the number of US customary teaspoons.

1 ml / 21 ml ≈ 0.202884136211058 usteaspoon / x usteaspoon

Now, we cross multiply to solve for our unknown x:

x usteaspoon ≈ (21 ml / 1 ml) * 0.202884136211058 usteaspoon → x usteaspoon ≈ 4.260566860432218 usteaspoon

Conclusion:

21 ml ≈ 4.260566860432218 usteaspoon

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US customary teaspoon is equal to 0.234710552083333 times 21 milliliters.

It can also be expressed as: 21 milliliters is equal to 1 / 0.234710552083333 US customary teaspoons.

Approximation

An approximate numerical result would be: twenty-one milliliters is about four point two five US customary teaspoons, or alternatively, a US customary teaspoon is about zero point two three times twenty-one milliliters.