Teaspoons to Milliliters
Enter US teaspoons and get milliliters. A US teaspoon is exactly 4.92892159375 mL, a sixth of a fluid ounce; medicine and food labels use 5 mL.
Formula: mL = tsp × 4.92892159375
How do you convert teaspoons to mL?
Multiply US teaspoons by 4.92892159375, or by 5 when a recipe or label uses the metric teaspoon. The gap is about 1.4%, so for cooking either works.
- 1 US tsp
- 4.929 mL
- 1 metric tsp
- 5 mL
- 3 tsp
- 1 tbsp
Teaspoons to mL table
| Teaspoons (tsp) | Milliliters (mL) |
|---|---|
| 1 | 4.928922 |
| 2 | 9.857843 |
| 3 | 14.78676 |
| 4 | 19.71569 |
| 5 | 24.64461 |
| 6 | 29.57353 |
| 7 | 34.50245 |
| 8 | 39.43137 |
| 9 | 44.36029 |
| 10 | 49.28922 |
| Teaspoons (tsp) | Milliliters (mL) |
|---|---|
| 12 | 59.14706 |
| 15 | 73.93382 |
| 20 | 98.57843 |
| 25 | 123.223 |
| 30 | 147.8676 |
| 40 | 197.1569 |
| 50 | 246.4461 |
| 60 | 295.7353 |
| 75 | 369.6691 |
| 100 | 492.8922 |
Teaspoons in medicine
Liquid medicines for children are often dosed in milliliters, while older labels and family habits still speak of teaspoons. In dosing, a teaspoon always means 5 mL. A dose of 7.5 mL is a teaspoon and a half; 2.5 mL is half a teaspoon.
The safest way to give that dose is with the syringe or cup packed with the medicine, which is marked in mL. US nutrition labeling rules also set the teaspoon at 5 mL, so the two systems agree on paper even though the US customary spoon is slightly smaller.
Use mL marks for doses
Doubling up from a kitchen spoon can be off by half a dose or more. If a measuring device is missing, ask a pharmacist for one rather than estimating.
- 2.5 mL = ½ tsp
- 5 mL = 1 tsp
- 10 mL = 2 tsp
- 15 mL = 1 tbsp
Teaspoons in baking
Leavening, salt and spices come in teaspoons because small errors there change a bake. Level the spoon with a knife, since a heaped teaspoon of baking powder can hold nearly twice the intended amount.
Three teaspoons make a tablespoon, covered on tbsp to mL. For liquid amounts in milliliters, L to mL handles the larger end.
Tsp to mL questions
How many mL are in a teaspoon?
4.929 mL in a US customary teaspoon. Metric measuring spoons, medicine labels and US nutrition labels all use 5 mL.
What is half a teaspoon in mL?
About 2.46 mL for a US teaspoon, or 2.5 mL for a metric one.
How many teaspoons is 10 mL?
About 2.03 US teaspoons, or exactly 2 metric teaspoons.
Can I use a kitchen spoon for a 5 mL dose?
Better not. Cutlery spoons hold anywhere from about 3 to 7 mL. Use the oral syringe or dosing cup that comes with the medicine.