Teaspoons to Milliliters Converter
1 teaspoon (tsp) equals 4.92892159375 milliliters (mL).
Quick answer
One US teaspoon is 4.93 mL, usually rounded to 5 mL.
- 1 teaspoon = 4.928921594 milliliters
- 1 milliliter = 0.2028841362 teaspoons
- Formula: mL = tsp × 4.92892159375
- Quick estimate: multiply by 5: 2 tsp ≈ 10 mL.
1 teaspoon = 4.928921594 milliliters
How to convert teaspoons to milliliters
mL = tsp × 4.92892159375
To convert teaspoons to milliliters, multiply the number of teaspoons by 4.92892159375.
Example: 42 tsp to mL
- Start with the value in teaspoons: 42 tsp.
- Multiply by 4.92892159375: 42 × 4.92892159375 = 207.0147069.
- Result: 42 teaspoons = 207.0147069 milliliters.
Going the other way, 1 milliliter = 0.202884136211 teaspoons, so to convert milliliters back to teaspoons you divide by the same number. See milliliters to teaspoons.
Where the conversion factor comes from
A US teaspoon is 1/6 US fl oz = 4.92892 mL; the metric teaspoon is 5 mL.
Mental math: tsp to mL in your head
Multiply by 5.
When you need to convert teaspoons to milliliters
- Converting recipes and medicine doses.
Common mistakes
- Using a heaped spoon.
Everyday teaspoons in milliliters
| Example | Teaspoons | Milliliters |
|---|---|---|
| ¼ tsp | 0.25 tsp | 1.2322 mL |
| ½ tsp | 0.5 tsp | 2.4645 mL |
| 1 tsp | 1 tsp | 4.9289 mL |
| 1 tbsp (3 tsp) | 3 tsp | 14.787 mL |
Teaspoons to milliliters conversion table
| Teaspoons (tsp) | Milliliters (mL) |
|---|---|
| 0.1 tsp | 0.4928921594 mL |
| 0.2 tsp | 0.9857843188 mL |
| 0.3 tsp | 1.478676478 mL |
| 0.4 tsp | 1.971568638 mL |
| 0.5 tsp | 2.464460797 mL |
| 0.6 tsp | 2.957352956 mL |
| 0.7 tsp | 3.450245116 mL |
| 0.8 tsp | 3.943137275 mL |
| 0.9 tsp | 4.436029434 mL |
| 1 tsp | 4.928921594 mL |
| 1.5 tsp | 7.393382391 mL |
| 2 tsp | 9.857843188 mL |
| 2.5 tsp | 12.32230398 mL |
| 3 tsp | 14.78676478 mL |
| 3.5 tsp | 17.25122558 mL |
| 4 tsp | 19.71568638 mL |
| 4.5 tsp | 22.18014717 mL |
| 5 tsp | 24.64460797 mL |
| 6 tsp | 29.57352956 mL |
| 7 tsp | 34.50245116 mL |
| 7.5 tsp | 36.96691195 mL |
| 8 tsp | 39.43137275 mL |
| 9 tsp | 44.36029434 mL |
| 10 tsp | 49.28921594 mL |
| 11 tsp | 54.21813753 mL |
| 12 tsp | 59.14705912 mL |
| 13 tsp | 64.07598072 mL |
| 14 tsp | 69.00490231 mL |
| 15 tsp | 73.93382391 mL |
| 16 tsp | 78.8627455 mL |
| 17 tsp | 83.79166709 mL |
| 18 tsp | 88.72058869 mL |
| 19 tsp | 93.64951028 mL |
| 20 tsp | 98.57843187 mL |
| 21 tsp | 103.5073535 mL |
| 22 tsp | 108.4362751 mL |
| 23 tsp | 113.3651967 mL |
| 24 tsp | 118.2941182 mL |
| 25 tsp | 123.2230398 mL |
| 26 tsp | 128.1519614 mL |
More tsp to mL values
- 27 tsp
- 28 tsp
- 29 tsp
- 30 tsp
- 31 tsp
- 32 tsp
- 33 tsp
- 34 tsp
- 35 tsp
- 36 tsp
- 37 tsp
- 38 tsp
- 39 tsp
- 40 tsp
- 41 tsp
- 42 tsp
- 43 tsp
- 44 tsp
- 45 tsp
- 46 tsp
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- 54 tsp
- 55 tsp
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- 79 tsp
- 80 tsp
- 81 tsp
- 82 tsp
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- 84 tsp
- 85 tsp
- 86 tsp
- 87 tsp
- 88 tsp
- 89 tsp
- 90 tsp
- 91 tsp
- 92 tsp
- 93 tsp
- 94 tsp
- 95 tsp
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- 100 tsp
- 110 tsp
- 120 tsp
- 130 tsp
- 140 tsp
- 150 tsp
- 160 tsp
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- 190 tsp
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- 210 tsp
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- 240 tsp
- 250 tsp
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- 280 tsp
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- 300 tsp
- 310 tsp
- 320 tsp
- 330 tsp
- 340 tsp
- 350 tsp
- 360 tsp
- 370 tsp
- 380 tsp
- 390 tsp
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- 410 tsp
- 420 tsp
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- 470 tsp
- 480 tsp
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- 800 tsp
- 900 tsp
- 1,000 tsp
- 1,200 tsp
- 1,500 tsp
- 2,000 tsp
- 2,500 tsp
- 3,000 tsp
- 4,000 tsp
- 5,000 tsp
- 10,000 tsp
What is a teaspoon?
The US teaspoon is one third of a tablespoon, 1/6 of a US fluid ounce, about 4.93 mL.
What is a milliliter?
The milliliter (also spelled millilitre) is one thousandth of a liter and exactly equal to one cubic centimeter (cc).
Convert teaspoons to other units
Convert other units to milliliters
Frequently asked questions
How many milliliters are in a teaspoon?
One teaspoon is 4.928921594 milliliters.
How many teaspoons are in a milliliter?
One milliliter is 0.2028841362 teaspoons.
What is the formula to convert teaspoons to milliliters?
mL = tsp × 4.92892159375.
How many mL is a teaspoon?
4.93 mL (US); 5 mL metric.