Teaspoons to Millilitres (tsp to ml)
1 tsp = 4.928922 ml. Multiply teaspoons by 4.928922; the box below does it both ways.
millilitres
1.5 tsp = 7.3934 ml · millilitres to teaspoons page
How to convert teaspoons to millilitres
- Take the value in teaspoons.
- Multiply by 4.928922 (because 1 tsp = 4.928922 ml).
- Example: 1.5 tsp × 4.928922 = 7.3934 ml.
- Going back: divide by 4.928922, or multiply by 0.2028841.
Where this comes up
A measuring teaspoon is 4.93 ml in the US system and exactly 5 ml in the metric system used on Indian medicine labels; the difference is 1.4%, irrelevant in cooking but worth knowing for a 2.5 ml dose. This page uses the US 4.929 ml.
| tsp | ml |
|---|---|
| 0.25 | 1.2322 |
| 0.5 | 2.4645 |
| 1 | 4.9289 |
| 1.5 | 7.3934 |
| 2 | 9.8578 |
| 2.5 | 12.3223 |
| 3 | 14.7868 |
| 4 | 19.7157 |
| 5 | 24.6446 |
| 6 | 29.5735 |
| 8 | 39.4314 |
| 10 | 49.2892 |
Questions people ask
How many millilitres are in 1 teaspoon?
1 tsp = 4.928922 ml. To convert, multiply the teaspoon value by 4.928922.
What is 3 tsp in ml?
3 tsp is 14.7868 ml.
How do I convert millilitres back to teaspoons?
Divide by 4.928922, or multiply by 0.2028841: 1 ml = 0.2028841 tsp.
More volume conversions
Millilitres to Teaspoons (ml to tsp) · ml to fl oz · fl oz to ml · L to gal · gal to L · tbsp to ml · all converters
Factors are the exact international definitions; last checked 2026-10-10.