Instantly convert US teaspoons (tsp) to milliliters (mL). Bidirectional, accurate, and free.
To convert US teaspoons to milliliters, use the formula milliliters = US teaspoons × 4.9289. For example, 2 US teaspoons equals 9.8578 milliliters. Type any number into the calculator above and the result appears instantly — you can also type into the milliliters box to convert the other way.
| US teaspoons | Milliliters |
|---|---|
| 0.25 tsp | 1.2322 mL |
| 0.5 tsp | 2.4645 mL |
| 1 tsp | 4.9289 mL |
| 1.5 tsp | 7.3934 mL |
| 2 tsp | 9.8578 mL |
| 3 tsp | 14.7868 mL |
| 4 tsp | 19.7157 mL |
| 5 tsp | 24.6446 mL |
There are 4.9289 milliliters in one US teaspoon. To convert any value, apply the formula milliliters = US teaspoons × 4.9289.
The formula is milliliters = US teaspoons × 4.9289. Enter a value above and the result updates instantly in both directions.
Yes. It uses the exact internationally-defined conversion factor, so results match official standards to several decimal places.
Yes — the converter is bidirectional. Type in either box and the other updates automatically using the inverse formula.