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Grams to Cups Converter
Convert grams to US cups for flour, sugar, butter and other baking ingredients.
Teaspoon to ML Converter
Convert US teaspoons to milliliters as you type. Type in either box, or switch to any other volume unit.
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About US teaspoons and milliliters
Volume units are everywhere in cooking, drinks, fuel and medicine. US recipes use cups, tablespoons and fluid ounces; most of the world uses millilitres and litres.
This converter changes US teaspoons (tsp) into milliliters (mL) instantly. You can also type in the second box to convert backwards, or pick any other volume unit from the menus.
Formula
mL = tsp × 4.928921594
1 tsp = 4.928921594 mL
1 mL = 0.202884136 tsp
Both units are defined in litres: 1 US teaspoon = 0.004928921594 litre, and 1 milliliter = 0.001 litre. Dividing one by the other gives the factor above.
Worked example
To convert 12 tsp: 12 × 4.928921594 = 59.14706 mL.
Notes and assumptions
Uses US customary units. A metric cup is 250 mL and a UK (imperial) gallon is 4.54609 L, so results differ if your recipe or spec uses those.
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US teaspoons to milliliters conversion table
| tsp | mL |
|---|---|
| 1 tsp | 4.928922 mL |
| 2 tsp | 9.857843 mL |
| 3 tsp | 14.78676 mL |
| 4 tsp | 19.71569 mL |
| 5 tsp | 24.64461 mL |
| 6 tsp | 29.57353 mL |
| 7 tsp | 34.50245 mL |
| 8 tsp | 39.43137 mL |
| 9 tsp | 44.36029 mL |
| 10 tsp | 49.28922 mL |
| 12 tsp | 59.14706 mL |
| 15 tsp | 73.93382 mL |
| 20 tsp | 98.57843 mL |
| tsp | mL |
|---|---|
| 25 tsp | 123.223 mL |
| 30 tsp | 147.8676 mL |
| 40 tsp | 197.1569 mL |
| 50 tsp | 246.4461 mL |
| 60 tsp | 295.7353 mL |
| 70 tsp | 345.0245 mL |
| 75 tsp | 369.6691 mL |
| 80 tsp | 394.3137 mL |
| 90 tsp | 443.6029 mL |
| 100 tsp | 492.8922 mL |
| 250 tsp | 1,232.23 mL |
| 500 tsp | 2,464.461 mL |
| 1,000 tsp | 4,928.922 mL |
How to convert by hand
- Take the value in US teaspoons.
- Multiply it by 4.928921594.
- Round only at the end.
Common mistakes
- Mixing US and UK units. A UK pint (568 mL) is about 20% bigger than a US pint (473 mL).
- Treating fluid ounces (volume) and ounces (weight) as the same thing. They only match for water-like liquids.
- Using a metric cup (250 mL) recipe with a US cup (236.6 mL) measure. The gap is small but adds up in baking.
Sources
- Unit definitions and exact conversion factors: NIST Special Publication 811, Guide for the Use of the International System of Units (SI).
Frequently asked questions
How many milliliters are in one US teaspoon?
1 tsp = 4.928922 mL.
How do I convert US teaspoons to milliliters?
Multiply by 4.928921594. Example: 10 tsp = 49.28922 mL.
How do I convert milliliters back to US teaspoons?
Divide by 4.928921594. Press the swap button in the converter.
About this tool
- Written by
- [Author: to be assigned]
- Reviewed by
- Formula tests passed · human review pending
- Last updated
- 31 Oct 2026
See our methodology and editorial policy. Think something’s off? Report an error with this tool.
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