Get precise volume conversions instantly for your cooking, baking, and chemistry needs. Accurate results, every single time.
Converting teaspoons to millilitres (tsp to mL) is one of the most common volume conversions in cooking, baking, and liquid measurements. Although many recipes and household references round 1 teaspoon to 5 mL, the precise value used in the United States customary system is 1 teaspoon = 4.92892 mL. This tool uses the exact conversion factor to ensure accurate and consistent results, especially when dealing with scientific formulas, supplements, medications, or any application where precision matters.
Teaspoons (tsp) are widely used in culinary measurements because they provide a simple way to portion small amounts of liquids or dry ingredients. However, teaspoon sizes can vary depending on region. The US teaspoon is defined as 4.92892 mL, the UK teaspoon is historically closer to 5.919 mL, and the metric teaspoon used in Australia, New Zealand, and many European countries is exactly 5 mL. Since recipes often travel internationally, converting to millilitres provides a universal, standardised measurement that anyone can follow.
Millilitres (mL) belong to the metric system, which is based on powers of ten. This makes mL the preferred unit for professional kitchens, laboratories, beverage manufacturing, and nutritional dosing. When converting from teaspoons to millilitres, you simply multiply the number of teaspoons by 4.92892. For example, 2 tsp equals 9.85784 mL, while 0.5 tsp equals 2.46446 mL. Using exact values ensures you maintain the intended flavour balance, chemical reaction, or dosage accuracy.
Adjust the sliders to see the conversion and visualize the volume.
≈ 4.93 mL
≈ 1.01 tsp
This teaspoon to millilitre converter instantly performs these calculations for you, removing the risk of rounding errors. It’s especially useful when working with small ingredient quantities like extracts, acids, oils, salt, spices, baking agents, or liquid supplements. Even slight deviations in measurement can affect texture, stability, or taste.
Below the calculator, you will also find a quick-reference table showing common teaspoon values converted to millilitres. This makes it easy to check conversions at a glance while following recipes or preparing instructions. Whether you’re cooking, mixing ingredients, preparing beverages, or measuring precise liquid volumes, this tool provides a reliable way to convert teaspoons to millilitres accurately every time.
In the world of cooking, baking, and pharmaceuticals, the difference between a successful result and a complete failure often comes down to precise measurements. The teaspoon (tsp) is a common kitchen volume unit, while the millilitre (ml) is the standard metric unit used globally for liquid volume. Converting between the two is crucial when adapting American recipes to European standards, or vice versa.
While 5 millilitres is often used as a convenient approximation for one teaspoon, the technical measurement for a standard U.S. teaspoon is slightly more precise: 1 tsp = 4.92892 mL. Our converter uses this accurate factor to ensure your culinary and scientific measurements are flawless. Forget the messy calculations—simply input your value and let EasyConverter handle the exact math.
This tool is particularly valuable for two common scenarios:
Quick visual reference: 1 teaspoon = ~5 mL
Tip: Each green bar visually represents the relative volume of teaspoons to milliliters.
Our tool is designed for maximum efficiency: simply enter the value you know—whether it's in tsp or ml—and the equivalent will be displayed instantly. Use the **⇆** icon to swap the input and output units with a single click, allowing for easy conversion in either direction (tsp to ml or ml to tsp).
Need a quick reference? Here are a few common tsp to ml and tsp to ml equivalents using the precise conversion factor:
| Teaspoon (tsp) | Millilitre (mL) |
|---|---|
| 1 tsp | 4.93 mL |
| 1/2 tsp | 2.46 mL |
| 1/4 tsp | 1.23 mL |
| 2 tsp | 9.85784 ml |
| 3 | 14.78676 |
| 4 | 19.71568 |
| 5 | 24.64460 |
| 6 | 29.57352 |
| 7 | 34.50244 |
| 8 | 39.43136 |
| 9 | 44.36028 |
| 10 | 49.28920 |
| 11 | 54.21812 |
| 12 | 59.14704 |
| 13 | 64.07596 |
| 14 | 69.00488 |
| 15 | 73.93380 |
| 16 | 78.86272 |
| 17 | 83.79164 |
| 18 | 88.72056 |
| 19 | 93.64948 |
| 20 | 98.57840 |
| 25 | 123.22300 |
| 30 | 147.86760 |
| 35 | 172.51220 |
| 40 | 197.15680 |
| 45 | 221.80140 |
| 50 | 246.44600 |
| Milliliters (ml) | Teaspoons (tsp) |
|---|---|
| 1 | 0.2 |
| 5 | 1.01442 |
| 10 | 2.02884 |
| 15 | 3.04326 |
| 20 | 4.05768 |
| 25 | 5.07210 |
| 30 | 6.08652 |
| 35 | 7.10094 |
| 40 | 8.11536 |
| 45 | 9.12978 |
| 50 | 10.14420 |
| 55 | 11.15862 |
| 60 | 12.17304 |
| 65 | 13.18746 |
| 70 | 14.20188 |
| 75 | 15.21630 |
| 80 | 16.23072 |
| 85 | 17.24514 |
| 90 | 18.25956 |
| 95 | 19.27398 |
| 100 | 20.28840 |
| 110 | 22.31724 |
| 120 | 24.34608 |
| 130 | 26.37492 |
| 140 | 28.40376 |
| 150 | 30.43260 |
| 200 | 40.57680 |
| 250 | 50.72100 |
| Region / Standard | Teaspoon (tsp) | Milliliters (mL) | Notes |
|---|---|---|---|
| US | 1 tsp | 4.92892 mL | Standard in US recipes; exact measurement for cooking & medicine |
| Metric (Australia, NZ, EU) | 1 tsp | 5 mL | Rounded metric teaspoon commonly used in recipes |
| UK (historical) | 1 tsp | 5.919 mL | Traditional UK teaspoon; rarely used today |