Teaspoons to Milliliters Converter
There are exactly 4.92892 milliliters in one teaspoon. To convert teaspoons to milliliters, multiply by 4.92892.
How to Convert Teaspoons to Milliliters
To convert teaspoons to milliliters, multiply by 4.92892.
For example: 5 teaspoons × 4.92892 = 24.6446 milliliters.
Where This Comes Up
Teaspoons are the smallest measure in an American recipe: salt, baking powder, vanilla, spices. Metric recipes and medicine labels use milliliters for the same amounts.
1/2 teaspoon of salt is 2.46446 milliliters, which metric recipes write as 2.5 mL.
What People Get Wrong
Medicine should not be measured with a kitchen teaspoon. The 5 mL on a dosing syringe is 1.4 percent more than a US teaspoon, and kitchen spoons vary far more than that.
Teaspoons to Milliliters Conversion Table
| Teaspoons (tsp) | Milliliters (mL) |
|---|---|
| 1 | 4.92892 |
| 2 | 9.85784 |
| 3 | 14.7868 |
| 4 | 19.7157 |
| 5 | 24.6446 |
| 6 | 29.5735 |
| 7 | 34.5025 |
| 8 | 39.4314 |
| 9 | 44.3603 |
| 10 | 49.2892 |
| 11 | 54.2181 |
| 12 | 59.1471 |
| 13 | 64.076 |
| 14 | 69.0049 |
| 15 | 73.9338 |
| 16 | 78.8627455 |
| 17 | 83.7917 |
| 18 | 88.7206 |
| 19 | 93.6495 |
| 20 | 98.5784 |
| 25 | 123.223 |
| 30 | 147.868 |
| 40 | 197.157 |
| 50 | 246.446 |
| 75 | 369.669 |
| 100 | 492.892 |
| 250 | 1,232.23 |
| 500 | 2,464.46 |
| 1,000 | 4,928.92 |
About These Units
The teaspoon
A US teaspoon is one third of a tablespoon, or about 4.93 milliliters. Metric recipes often round the teaspoon to a flat 5 milliliters, which is close enough for cooking but not for medicine.
The milliliter
A milliliter is one thousandth of a liter and is exactly the same volume as one cubic centimeter. It is the standard unit in metric recipes and on medicine labels.
Definitions follow NIST Handbook 44, Appendix C. See how we calculate for the exact values and rounding rules.
Frequently Asked Questions
How many mL is 1 teaspoon?
One US teaspoon is 4.92892159375 milliliters, universally rounded to 5 mL.
Is a teaspoon exactly 5 mL?
Not quite. The US teaspoon is 4.92892 mL. The 5 mL figure is a metric convention adopted because it is easier to work with.
How many teaspoons are in a tablespoon?
Exactly 3 US teaspoons make one US tablespoon.
How many mL is a quarter teaspoon?
A quarter US teaspoon is 1.23223 milliliters.