Convert US Teaspoon to Millilitre
1 us teaspoon = 4.928922 millilitre (mL). For example, 10 us teaspoon = 49.28922 millilitre and 100 us teaspoon = 492.8922 millilitre. Type any value below to convert us teaspoon to millilitre both ways — it runs entirely in your browser.
US Teaspoon to Millilitre conversion formula
To convert us teaspoon to millilitre, multiply by 4.928922:
millilitre = us teaspoon × 4.928922
Going the other way, 1 millilitre = 0.2028841 us teaspoon, so
us teaspoon = millilitre × 0.2028841.
US Teaspoon to Millilitre — worked examples
| US Teaspoon | Millilitre |
|---|---|
| 1 tsp | 4.928922 mL |
| 2 tsp | 9.857843 mL |
| 3 tsp | 14.78676 mL |
| 5 tsp | 24.64461 mL |
| 10 tsp | 49.28922 mL |
| 25 tsp | 123.223 mL |
| 50 tsp | 246.4461 mL |
| 100 tsp | 492.8922 mL |
US Teaspoon ↔ Millilitre reference table
| US Teaspoon → Millilitre | Millilitre → US Teaspoon |
|---|---|
| 1 tsp = 4.928922 mL | 1 mL = 0.2028841 tsp |
| 2 tsp = 9.857843 mL | 2 mL = 0.4057683 tsp |
| 5 tsp = 24.64461 mL | 5 mL = 1.014421 tsp |
| 10 tsp = 49.28922 mL | 10 mL = 2.028841 tsp |
| 20 tsp = 98.57843 mL | 20 mL = 4.057683 tsp |
| 50 tsp = 246.4461 mL | 50 mL = 10.14421 tsp |
| 100 tsp = 492.8922 mL | 100 mL = 20.28841 tsp |
| 250 tsp = 1,232.23 mL | 250 mL = 50.72103 tsp |
| 500 tsp = 2,464.461 mL | 500 mL = 101.4421 tsp |
| 1000 tsp = 4,928.922 mL | 1000 mL = 202.8841 tsp |
About us teaspoon and millilitre
US Teaspoon: A US teaspoon is 1/6 US fluid ounce — 4.92892159375 mL.
Millilitre: A millilitre is one-thousandth of a litre — equal to one cubic centimetre.
Watch the system: a US gallon, quart, pint and fluid ounce are not the same size as the imperial (UK) ones — a US gallon is 3.785 L while an imperial gallon is 4.546 L, and a US fluid ounce (29.57 mL) is slightly larger than an imperial fluid ounce (28.41 mL). The units on this page are labelled US or Imperial so the result is unambiguous.
Frequently asked questions
- How many millilitre are in 1 us teaspoon?
- 1 us teaspoon = 4.928922 millilitre (mL).
- How do I convert us teaspoon to millilitre?
- Multiply the number of us teaspoon by 4.928922. For example, 10 us teaspoon = 10 × 4.928922 = 49.28922 millilitre.
- How many us teaspoon are in 1 millilitre?
- 1 millilitre = 0.2028841 us teaspoon.
- Which is bigger, us teaspoon or millilitre?
- 1 us teaspoon equals 4.928922 millilitre, so a us teaspoon is the larger unit.