Milliliter to Teaspoon Converter
Enter the value that you want to convert milliliter (mL) to teaspoon (tsp) or teaspoon to milliliter.Also written as ML to TSP conversion.
1 milliliter = 0.2028841 teaspoon
Formula: teaspoon = milliliter value × 0.2028841
ML to TSP — milliliter to teaspoon
10 milliliter = 2.02884 teaspoon
Popular Volume Converters:
Converting Milliliter to Teaspoon
The Milliliter Explained
Milliliter (mL) is a unit of volume measurement. 1 milliliter is equal to 0.2028841 teaspoon.
Understanding the Teaspoon
Teaspoon (tsp) is a unit of volume measurement. 1 teaspoon is equal to 4.9289216 milliliter.
Volume Measurement Systems
Volume units are particularly confusing because the US and UK gallons differ (US gallon = 3.785 L, UK gallon = 4.546 L), as do their pints, cups, and fluid ounces. Cooking, fuel economy, beverage production, and pharmaceutical compounding all require precise volume conversions. Laboratory work uses milliliters and liters while US recipes specify cups, tablespoons, and fluid ounces.
milliliter to teaspoon metric conversion table
| 0.01 mL | = | 0.00203 tsp |
| 0.1 mL | = | 0.02029 tsp |
| 1 mL | = | 0.20288 tsp |
| 2 mL | = | 0.40577 tsp |
| 3 mL | = | 0.60865 tsp |
| 4 mL | = | 0.81154 tsp |
| 5 mL | = | 1.01442 tsp |
| 6 mL | = | 1.21730 tsp |
| 7 mL | = | 1.42019 tsp |
| 8 mL | = | 1.62307 tsp |
| 9 mL | = | 1.82596 tsp |
| 10 mL | = | 2.02884 tsp |
| 11 mL | = | 2.23173 tsp |
| 12 mL | = | 2.43461 tsp |
| 13 mL | = | 2.63749 tsp |
| 14 mL | = | 2.84038 tsp |
| 15 mL | = | 3.04326 tsp |
| 16 mL | = | 3.24615 tsp |
| 17 mL | = | 3.44903 tsp |
| 18 mL | = | 3.65191 tsp |
| 19 mL | = | 3.85480 tsp |
| 20 mL | = | 4.05768 tsp |
| 30 mL | = | 6.08652 tsp |
| 40 mL | = | 8.11537 tsp |
| 50 mL | = | 10.14421 tsp |
| 60 mL | = | 12.17305 tsp |
| 70 mL | = | 14.20189 tsp |
| 80 mL | = | 16.23073 tsp |
| 90 mL | = | 18.25957 tsp |
| 100 mL | = | 20.28841 tsp |
| 200 mL | = | 40.57683 tsp |
| 300 mL | = | 60.86524 tsp |
| 400 mL | = | 81.15365 tsp |
| 500 mL | = | 101.44207 tsp |
| 600 mL | = | 121.73048 tsp |
| 700 mL | = | 142.01890 tsp |
| 800 mL | = | 162.30731 tsp |
| 900 mL | = | 182.59572 tsp |
| 1000 mL | = | 202.88414 tsp |
How to Convert ML to TSP (Milliliter to Teaspoon)?
We can convert milliliter to teaspoon by using an example.
Example:
Convert 20 Milliliter to Teaspoon?
We know 1 Milliliter = 0.2028841 teaspoon; 1 Teaspoon = 4.9289216 milliliter.
20 milliliter = ___tsp
20 × 0.2028841 = 4.05768 tsp (we know 1 milliliter = 0.2028841 teaspoon)
Answer:
20 milliliter = 4.05768 teaspoon
How to Convert Milliliters to Teaspoons (Step-by-Step)
Converting milliliters to teaspoons is most commonly needed when a medication label shows dosage in mL but a parent needs to relate this to a familiar kitchen measurement. One teaspoon equals approximately 5 mL (medical standard) or exactly 4.929 mL.
- Write down the volume in milliliters.
- Divide by 4.929 mL for exact conversion (or by 5 mL for medical approximation).
- The result is the number of teaspoons.
- Express partial teaspoons as fractions (½, ¼) for practical measuring.
Common mL to Teaspoon Conversions
Reference for medication dosages and cooking measurements converted from mL to teaspoons:
| Milliliter | Teaspoon |
|---|---|
| 1.25 mL | ¼ tsp |
| 2.5 mL | ½ tsp |
| 5 mL | 1 tsp |
| 7.5 mL | 1½ tsp |
| 10 mL | 2 tsp |
| 15 mL | 3 tsp (= 1 tbsp) |
| 20 mL | 4 tsp |
| 30 mL | 6 tsp (= 2 tbsp) |
Solved Examples: mL to Teaspoons
Question 1: A children's ibuprofen label says to give 7.5 mL. How many teaspoons is that?
Solution:
Teaspoons = mL ÷ 5 (medical standard)
= 7.5 ÷ 5
= 1.5 teaspoons
Answer: 7.5 mL = 1½ teaspoons.
Question 2: A recipe calls for 20 mL of lemon juice. Convert to teaspoons.
Solution:
Teaspoons = mL ÷ 4.929
= 20 ÷ 4.929
= 4.06 teaspoons
Answer: 20 mL ≈ 4 teaspoons (or 1 tablespoon + 1 teaspoon).
Question 3: An infant is prescribed 1.25 mL of medicine. Express in teaspoons.
Solution:
Teaspoons = 1.25 ÷ 5
= 0.25 teaspoons = ¼ teaspoon
Answer: 1.25 mL = ¼ teaspoon (use the oral syringe for this small amount).
Question 4: Convert 12 mL of fish sauce to teaspoons.
Solution:
Teaspoons = 12 ÷ 4.929
= 2.43 teaspoons
Answer: 12 mL ≈ 2½ teaspoons.
Practice Questions
Try solving these on your own to test your understanding:
- Convert 3 mL to teaspoons. (Answer: about ⅝ tsp or 0.6 tsp)
- How many teaspoons is 25 mL? (Answer: 5 tsp)
- A dose is 6 mL. Express in teaspoons. (Answer: 1.2 tsp ≈ 1¼ tsp)
- Convert 8 mL to teaspoons. (Answer: 1.6 tsp)
- How many teaspoons in 50 mL? (Answer: 10 tsp ≈ 3⅓ tbsp)
Reading Children's Medicine Labels
Most children's medications (Tylenol, Motrin, Benadryl) now show dosages in mL on the label and include a dosing syringe. The teaspoon equivalent is often shown in parentheses for parents' reference. For example: "Give 5 mL (1 tsp) every 4-6 hours." If the package says 7.5 mL, that is 1½ teaspoons — but always use the included syringe for accuracy rather than a kitchen spoon.
When to Use Oral Syringes vs. Dosing Cups
For doses under 5 mL, always use an oral syringe — dosing cups are inaccurate for small volumes because the markings are too close together. For doses of 10 mL or more, either a syringe or dosing cup works well. Studies show dosing cup errors average 20% for doses under 5 mL but only 5% for doses over 10 mL. The FDA recommends that all liquid medicines include a measuring device matched to the labeled dose.
Key Takeaways
- Divide mL by 5 to get teaspoons (medical standard).
- Key medical doses: 2.5 mL = ½ tsp, 5 mL = 1 tsp, 10 mL = 2 tsp.
- Always use the syringe/cup provided with medicine, not kitchen spoons.
- For doses under 5 mL, oral syringes are far more accurate than cups.
- 15 mL = 1 tablespoon = 3 teaspoons.
- Exact conversion: 1 tsp = 4.929 mL (medical rounds to 5 mL).
Milliliter to Teaspoon Conversion Formula
teaspoon = milliliter × 0.2028841
1 milliliter = 0.2028841 teaspoon
1 teaspoon = 4.9289216 milliliter
Reverse: milliliter = teaspoon × 4.9289216
Frequently Asked Questions
How many teaspoon are in 1 milliliter?
There are 0.2028841 teaspoon in 1 milliliter. To convert milliliter to teaspoon, multiply the value by 0.2028841.
How do I convert milliliter to teaspoon?
Multiply your milliliter value by 0.2028841 to get the equivalent in teaspoon. For example, 5 milliliter = 5 × 0.2028841 = 1.01442 teaspoon.
How do I convert teaspoon to milliliter?
Multiply your teaspoon value by 4.9289216 to get the equivalent in milliliter. Alternatively, divide by 0.2028841.
What is 10 milliliter in teaspoon?
10 milliliter is equal to 2.02884 teaspoon.
What is 100 milliliter in teaspoon?
100 milliliter is equal to 20.28841 teaspoon.