To convert teaspoons to milliliters, multiply by 4.92892. So 1 tsp = 4.93 ml, 2 tsp = 9.86 ml, and 3 tsp = 14.79 ml (1 tablespoon). In medicine, 1 teaspoon is standardized to 5 ml exactly.
- Formula: ml = tsp × 4.92892. Quick estimate: 1 tsp ≈ 5 ml (medical standard).
- 3 tsp = 1 tablespoon = 14.79 ml. 6 tsp = 2 tbsp = 1 fl oz = 29.57 ml.
- Medicine uses 5 ml per teaspoon for dosing. Recipes may specify 4.93 or 5 ml - both are correct in context.
- Reverse: tsp = ml ÷ 4.92892.
How to use our tsp to ml converter
Type any teaspoon value in the tsp field and the ml result appears instantly. Use decimals for partial teaspoons (0.5 for half a teaspoon). Both directions work without pressing a button.
How do you convert teaspoons to ml?
Multiply the number of teaspoons by 4.92892. The US teaspoon is defined as exactly 1/3 of a tablespoon = 14.7868/3 = 4.92892 ml. For medicine, the standard is 5 ml per teaspoon as defined by the US FDA for over-the-counter labeling.
$$\text{ml} = \text{tsp} \times 4.92892$$
Worked examples: 1/4 tsp = 1.23 ml. 1/2 tsp = 2.46 ml. 1 tsp = 4.93 ml. 2 tsp = 9.86 ml. 3 tsp = 14.79 ml. 6 tsp = 29.57 ml. 12 tsp = 59.15 ml (1/4 cup).
Teaspoons to ml reference table
Teaspoon fractions and multiples converted to ml, with tablespoon and cup equivalents:
| Teaspoons | Milliliters | Equivalent |
|---|---|---|
| 1/4 tsp | 1.23 ml | - |
| 1/2 tsp | 2.46 ml | - |
| 3/4 tsp | 3.70 ml | - |
| 1 tsp | 4.93 ml | - |
| 1.5 tsp | 7.39 ml | - |
| 2 tsp | 9.86 ml | - |
| 3 tsp | 14.79 ml | 1 tablespoon |
| 6 tsp | 29.57 ml | 2 tbsp / 1 fl oz |
| 12 tsp | 59.15 ml | 4 tbsp / 1/4 cup |
| 24 tsp | 118.3 ml | 8 tbsp / 1/2 cup |
| 48 tsp | 236.6 ml | 16 tbsp / 1 cup |
FAQs about tsp to ml conversion
How many ml is 1 teaspoon?
1 US teaspoon equals 4.92892 ml. In cooking, this is usually rounded to 5 ml. For medical liquid dosing, 5 ml is the official teaspoon standard per FDA labeling guidelines.
Is 5 ml equal to 1 teaspoon?
5 ml is approximately 1 teaspoon, but not exactly. The US teaspoon is 4.929 ml. 5 ml is 1.4% larger. Medical dosing cups are calibrated to 5 ml per teaspoon. For cooking, the difference is negligible.
How many ml is 2 teaspoons?
2 teaspoons equals 9.858 ml. This is often rounded to 10 ml in liquid medicine dosing instructions.
How many teaspoons is 10 ml?
10 ml equals 2.029 teaspoons - essentially 2 teaspoons. Many liquid medicines specify a 10 ml dose, described as 2 teaspoons on the label.