How much is 15 ml in Teaspoon?

One can use the following conversion factor to convert 15 milliliters (mL) to teaspoons (tsp).

1 mL ≈ 0.202884 tsp (or 1 tsp ≈ 4.92892 mL)

So:

15 mL × 0.202884 tsp/mL ≈ 3.04326 tsp

Therefore, 15 mL is approximately equal to 3 teaspoons.