teaspoons to ml | Exact Decimal + Formula
1 US Teaspoon = 4.928922 Milliliter
Teaspoons to milliliters is a cooking and medicine conversion — one US teaspoon is exactly 4.9289 milliliters.
About US Teaspoon and Milliliter
US Teaspoon (tsp)
A US teaspoon is 1/48 of a cup, about 4.93 milliliters.
Where it's used: Small ingredient amounts and seasoning in recipes.
Milliliter (mL)
A milliliter equals one cubic centimeter; the standard small volume unit in metric recipes.
Where it's used: International recipes, medicine dosing, and precise liquids.
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Cooking (Volume) Converter
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Formula
mL = tsp × 4.928921583
To convert US Teaspoon to Milliliter, use the formula displayed above.
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US Teaspoon to Milliliter: Quick Reference Table
| US Teaspoon | Milliliter (Decimal) | Fraction |
|---|---|---|
| 0.001 tsp | 0.004929 mL | - |
| 0.01 tsp | 0.049289 mL | - |
| 0.1 tsp | 0.492892 mL | - |
| 0.5 tsp | 2.464461 mL | - |
| 1 tsp | 4.928922 mL | - |
| 2 tsp | 9.857843 mL | - |
| 5 tsp | 24.644608 mL | - |
| 10 tsp | 49.289216 mL | - |
| 25 tsp | 123.22304 mL | - |
| 50 tsp | 246.446079 mL | - |
| 100 tsp | 492.892158 mL | - |
| 250 tsp | 1232.230396 mL | - |
| 500 tsp | 2464.460792 mL | - |
| 1000 tsp | 4928.921583 mL | - |
tsp to mL Formula and Examples
Direct Formula
mL = tsp × 4.928921583 Inverse Formula
tsp = mL × 0.202884 Mental Math Shortcut
Multiply the value by roughly 4.9 to calculate the equivalent amount in your head.
Common US Teaspoon to Milliliter Calculations
- 5 tsp = 24.644608 mL
- 10 tsp = 49.289216 mL
- 50 tsp = 246.446079 mL
- 100 tsp = 492.892158 mL
- 500 tsp = 2464.460792 mL
Precision & Practical Use
For example, 10 tsp = 49.289216 mL — roughly a standard double espresso.
Results are computed to up to 9 decimal places. Round to the precision of your measuring instrument — for most cooking (volume) applications, 2–3 significant figures are plenty.
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Related Reading
How to Convert US Teaspoon to Milliliter
How many milliliters are in one us teaspoon?
One US Teaspoon (tsp) equals 4.928922 Milliliter (mL). To convert us teaspoons to milliliters, multiply the us teaspoon value by 4.928922.
How do I convert US Teaspoon to Milliliter?
Multiply your us teaspoon value by 4.928922 to get the result in Milliliter: mL = tsp × 4.928922. For example, 5 tsp = 24.644608 mL.
What is the formula for converting tsp to mL?
The conversion formula is mL = tsp × 4.928922. Use the calculator above for any value, and see the reference table below for common inputs from 0.001 to 1000.
Is there a quick mental estimate for tsp to mL?
Multiply the value by roughly 4.9 to calculate the equivalent amount in your head.
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