Convert teaspoons to millilitres
Enter a value in teaspoons (tsp) to get millilitres (ml). One teaspoon (US) is 4.9289 millilitres; one millilitre is 0.202884 teaspoons.
How to use the Teaspoon (US) to millilitre
- Type the number of teaspoons.
- Click Convert.
- Read the result in millilitres, plus the same value in every other volume unit.
tsp to ml formula
millilitres = teaspoons × 4.9289. To go the other way, teaspoons = millilitres × 0.202884 (see millilitres to teaspoons).
Worked example
12 tsp × 4.9289 = 59.1471 ml.
Teaspoons to millilitres conversion table
| Teaspoons | Millilitres |
|---|---|
| 0.1 tsp | 0.492892 ml |
| 0.5 tsp | 2.4645 ml |
| 1 tsp | 4.9289 ml |
| 2 tsp | 9.8578 ml |
| 3 tsp | 14.7868 ml |
| 5 tsp | 24.6446 ml |
| 10 tsp | 49.2892 ml |
| 20 tsp | 98.5784 ml |
| 25 tsp | 123.223 ml |
| 50 tsp | 246.4461 ml |
| 100 tsp | 492.8922 ml |
| 250 tsp | 1,232.23 ml |
| 500 tsp | 2,464.46 ml |
| 1,000 tsp | 4,928.92 ml |
About the teaspoon (US)
Exactly 4.92892 ml in US recipes (5 ml in metric recipes).
About the millilitre
One cubic centimetre. Drinks, medicine and recipes in the metric world.
Related conversions
Frequently asked questions
How many millilitres in a teaspoon (US)?
4.9289 millilitres.
How many teaspoons in a millilitre?
0.202884 teaspoons.
Is the factor exact?
The factor 4.9289 is derived from the units' exact definitions; only the display is rounded.
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Last updated 2026-09-23.