US teaspoons to milliliters
1 US teaspoon = 4.92892 milliliters
Type a value in US teaspoons (tsp) to get milliliters (mL) straight away. A US teaspoon is larger than a milliliter, so the number goes up. Both units belong to volume, measured here against the liter.
1 tsp = 4.9289216 mL
Formula
mL = tsp × 4.9289216
One US teaspoon is 4.9289216 milliliters, so multiply the US teaspoon value by that factor. Here tsp is the value in US teaspoons and mL is the result in milliliters.
Worked example: 2 US teaspoons × 4.9289216 = 9.85784 milliliters.
US teaspoons to milliliters table
| US teaspoons (tsp) | milliliters (mL) |
|---|---|
| 1 tsp | 4.92892 mL |
| 2 tsp | 9.85784 mL |
| 3 tsp | 14.7868 mL |
| 4 tsp | 19.7157 mL |
| 5 tsp | 24.6446 mL |
| 6 tsp | 29.5735 mL |
| 7 tsp | 34.5025 mL |
| 8 tsp | 39.4314 mL |
| 9 tsp | 44.3603 mL |
| 10 tsp | 49.2892 mL |
| 15 tsp | 73.9338 mL |
| 20 tsp | 98.5784 mL |
| 25 tsp | 123.223 mL |
| 30 tsp | 147.868 mL |
| 40 tsp | 197.157 mL |
| 50 tsp | 246.446 mL |
| 60 tsp | 295.735 mL |
| 75 tsp | 369.669 mL |
| 100 tsp | 492.892 mL |
Everyday US teaspoons in milliliters
| What it is | tsp | mL |
|---|---|---|
| half a teaspoon | 0.5 tsp | 2.46446 mL |
| one teaspoon | 1 tsp | 4.92892 mL |
| one tablespoon | 3 tsp | 14.7868 mL |
| one fluid ounce | 6 tsp | 29.5735 mL |
| one cup | 48 tsp | 236.588 mL |
Quick estimate in your head
Multiply by about 4.9. For 2 tsp that gives 9.8 mL against an exact 9.85784 mL, an error of 0.6%.
About the units
US teaspoon (tsp). A third of a tablespoon, about 4.93 mL. Metric teaspoons are 5 mL.
Milliliter (mL). One thousandth of a liter, the same as one cubic centimeter. Used for drinks and medicine.
Going the other way, 1 milliliter is 0.202884 US teaspoons.
Questions
How many milliliters are in 1 US teaspoon?
1 US teaspoon is 4.92892 milliliters, and 1 milliliter is 0.202884 US teaspoons.
How do I convert US teaspoons to milliliters?
Use mL = tsp × 4.9289216. For example, 2 US teaspoons × 4.9289216 = 9.85784 milliliters.
Are US and UK measures the same?
No. This page uses US customary units. A UK gallon is 4.546 L against 3.785 L in the US, and a UK pint is 568 mL against 473 mL.
How much is one cup in milliliters?
48 tsp is 236.588 mL.
Source for the conversion factor: NIST Handbook 44, Appendix C (units of volume).
Related conversions
- milliliters to US teaspoons
- milliliters to US fluid ounces
- US fluid ounces to milliliters
- milliliters to US cups
- US cups to milliliters
- liters to milliliters