1 US tsp = ⅓ US tbsp = 4.92892159375 mL 1 mL = 1 cm³ = 0.000001 m³
Result in Milliliters (mL)
4.928921594
Reverse factor
1 mL = 0.2028841362 tsp
Common volume conversions
1 tsp
4.928921594 mL
1 tbsp
14.78676478 mL
1 fl oz
29.57352956 mL
1 cup
236.5882365 mL
1 pt
0.473176473 L
1 qt
0.946352946 L
1 gal
3.785411784 L
1 imp gal
4.54609 L
Teaspoons to milliliters conversion table
Teaspoons to milliliters
Teaspoons, US (tsp)
Milliliters (mL)
0.25 tsp
1.232230398 mL
0.5 tsp
2.464460797 mL
1 tsp
4.928921594 mL
2 tsp
9.857843188 mL
3 tsp
14.78676478 mL
4 tsp
19.71568638 mL
5 tsp
24.64460797 mL
The formula
mL = tsp × 4.928921594
1 US tsp = ⅓ US tbsp = 4.92892159375 mL. 1 mL = 1 cm³ = 0.000001 m³. These are exact definitions, so the only rounding is in the displayed result (10 significant digits).
When you need it
Teaspoons to milliliters matters for medicine as much as cooking. A US teaspoon is about 4.93 mL; medicine labels use a 5 mL teaspoon, and pharmacists recommend measuring liquid medicine with a dosing syringe in mL rather than a kitchen spoon.