How millilitres to teaspoons are calculated
A teaspoon is a fixed volume, so the conversion is one division: by 4.929 ml for a US teaspoon or 5 ml for a metric one.
teaspoons = millilitres ÷ 4.929 (US) or ÷ 5 (metric)
- A US teaspoon is a sixth of a US fluid ounce: 4.929 ml. A metric teaspoon, used in Australia, New Zealand, Canada and UK cooking, is 5 ml.
- Divide millilitres by the teaspoon size for teaspoons, or multiply teaspoons by it to go back.
- The kitchen amount rounds to the nearest ¼ teaspoon, the smallest common measuring spoon.
- Three teaspoons make one tablespoon in both US and metric measures.
Worked example — 15 ml ÷ 4.9289 = 3.0433 US teaspoons, about 3 tsp, or 1.0144 tablespoons.
Common amounts converted
| Millilitres | US teaspoons | Metric teaspoons |
|---|---|---|
| 1 ml | 0.2029 tsp | 0.2 tsp |
| 2.5 ml | 0.5072 tsp | 0.5 tsp |
| 5 ml | 1.0144 tsp | 1 tsp |
| 10 ml | 2.0288 tsp | 2 tsp |
| 15 ml | 3.0433 tsp | 3 tsp |
| 20 ml | 4.0577 tsp | 4 tsp |
| 30 ml | 6.0865 tsp | 6 tsp |
| 50 ml | 10.1442 tsp | 10 tsp |
| 100 ml | 20.2884 tsp | 20 tsp |
Swipe the table sideways to see the rest.
To go the other way, choose the Teaspoons to millilitres direction.
Things to consider
- Check which spoon your recipe uses. The 1.4% gap only matters in large batches.
- This converts volume, not weight. A teaspoon of salt and of flour weigh different amounts.
- Level the spoon with a knife for a repeatable measure.
- For medicine, use the syringe or cup that comes with it, not a kitchen spoon.
Frequently asked questions
How many ml is a teaspoon?
4.929 ml for a US teaspoon, and 5 ml for a metric teaspoon.
Is a teaspoon 5 ml?
A metric teaspoon is exactly 5 ml. A US teaspoon is slightly less, at 4.929 ml.
How many teaspoons are in 10 ml?
2 metric teaspoons, or 2.0288 US teaspoons.
Can I use a kitchen teaspoon for medicine?
No. Cutlery spoons vary a lot in size. Use the measuring device that comes with the medicine. This is not medical advice; ask a pharmacist if unsure.
How many teaspoons are in a tablespoon?
Three, in both US and metric measures. To convert to tablespoons directly, use the Millilitres to Tablespoons Converter.
Results are estimates for general information only, not financial, medical or professional advice.