Teaspoons to Milliliters Converter
Enter a number of teaspoons and read the volume in milliliters or liters. The converter uses the US teaspoon (4.93 ml) or the imperial teaspoon (5.92 ml) and rounds milliliters to whole numbers.
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Created by the Reeliy Editorial Team. Last updated: Oct 19, 2026
Teaspoons versus milliliters in recipes
A teaspoon is an informal unit with three common sizes. The US teaspoon is one third of a US tablespoon, about 4.93 ml. The imperial teaspoon is about 5.92 ml. And many modern measuring spoons, food labels and dosing guides simply define a teaspoon as 5 ml.
The US and metric values are only 1.4% apart, which is why "a teaspoon is 5 ml" works well in a kitchen. The imperial spoon is noticeably bigger, about 20% more than the US one.
How to convert teaspoons to milliliters
- Enter the number of teaspoons in the Convert box and choose US Teaspoons or Imp. Teaspoons.
- Select MilliLiters or Liters in the To menu.
- Read the result. It updates as you type. The ingredient menu has no effect, since both units are volumes.
milliliters = US teaspoons × 4.92892
milliliters = imperial teaspoons × 5.91939Divide milliliters by 1,000 for liters.
The converter rounds milliliters to whole numbers and liters to three decimals. One US teaspoon therefore shows as 5 ml although its true volume is 4.93 ml.
Worked examples
1 US teaspoon. 1 × 4.92892 = 4.93 ml, displayed as 5 ml. One imperial teaspoon, 5.92 ml, displays as 6 ml.
12 US teaspoons. 12 × 4.92892 = 59.15 ml, displayed as 59 ml. Twelve imperial teaspoons come to 71.03 ml, shown as 71 ml.
100 US teaspoons. 100 × 4.92892 = 492.89 ml, displayed as 493 ml. Larger counts show a smaller rounding error.
3 US teaspoons in liters. One tablespoon is 14.79 ml, which is 0.015 liters once rounded to three decimals.
Teaspoons to milliliters conversion table
| Teaspoons | US tsp (shown, ml) | US tsp (exact, ml) | Imp. tsp (shown, ml) | Imp. tsp (exact, ml) |
|---|---|---|---|---|
| 1 | 5 | 4.93 | 6 | 5.92 |
| 2 | 10 | 9.86 | 12 | 11.84 |
| 3 | 15 | 14.79 | 18 | 17.76 |
| 4 | 20 | 19.72 | 24 | 23.68 |
| 5 | 25 | 24.64 | 30 | 29.6 |
| 6 | 30 | 29.57 | 36 | 35.52 |
| 8 | 39 | 39.43 | 47 | 47.36 |
| 10 | 49 | 49.29 | 59 | 59.19 |
| 12 | 59 | 59.15 | 71 | 71.03 |
| 16 | 79 | 78.86 | 95 | 94.71 |
| 24 | 118 | 118.29 | 142 | 142.07 |
| 48 | 237 | 236.59 | 284 | 284.13 |
Practical notes
- For cooking, treating a teaspoon as 5 ml is fine. If a recipe is very sensitive, such as a pastry glaze or a brine, weigh it on a scale.
- Check where a recipe comes from. British recipes written decades ago may mean the larger imperial teaspoon.
- Going the other way, the milliliters to teaspoons converter shows how many spoonfuls an amount in ml makes.
Kitchen teaspoons are not suitable for measuring medicine. Use the dosing device supplied with the product and follow professional advice. See our disclaimer.
Frequently asked questions
How many milliliters are in a teaspoon?
A US teaspoon is about 4.93 ml, an imperial teaspoon about 5.92 ml, and a metric teaspoon is defined as 5 ml. The converter shows 5 ml for one US teaspoon and 6 ml for one imperial teaspoon because it rounds to whole milliliters.
How many milliliters are in 3 teaspoons?
Three US teaspoons are one tablespoon, 14.79 ml, shown as 15 ml.
Is a teaspoon exactly 5 ml?
Only by convention. The nominal 5 ml teaspoon is used on nutrition labels and many measuring sets, but a true US teaspoon is 4.93 ml.
How many teaspoons are in 100 ml?
Divide 100 by 4.92892 for US teaspoons: 20.288. Use the milliliters to teaspoons converter for that direction.
References
- NIST Special Publication 811, Guide for the Use of the International System of Units (SI)
- U.S. Code of Federal Regulations, 21 CFR 101.9, Nutrition labeling of food (household measures for nutrition labels)
Cite this converter and page
If you use this page in your work, you can cite it as:
Reeliy Editorial Team. (2026). Teaspoons to Milliliters Converter. Reeliy. https://reeliy.com/converters/convert-tsp-to-ml“Teaspoons to Milliliters Converter.” Reeliy, 2026, https://reeliy.com/converters/convert-tsp-to-ml.