A US teaspoon is a customary volume unit equal to 4.92892159375 milliliters, commonly used in recipes.
Teaspoon to Milliliter
Convert Teaspoon to Milliliter instantly. Free online cooking unit converter with exact formula, conversion table and FAQ.
Reserved for a responsive leaderboard above the conversion details.
Professional calculator style
World-scale conversion engine
30+ categories
6,500+ units
Instant results
Offline ready
Converter
Cooking Converter
Convert cooking volume and mass units used in recipes and nutrition workflows.
Context values
Some unit families need one extra value for a physically accurate result.
The milliliter is one-thousandth of a liter, a standard metric unit of volume.
mL = tsp × 4.928921594
Results update instantly for Teaspoon to Milliliter conversions.
Reserved above the conversion cards and below the converter.
Formula
mL = tsp × 4.928921594
tsp = mL × 0.2028841362
Conversion table
| 1 tsp | 4.928922 mL |
| 5 tsp | 24.644608 mL |
| 10 tsp | 49.289216 mL |
| 20 tsp | 98.578432 mL |
| 50 tsp | 246.44608 mL |
| 100 tsp | 492.892159 mL |
| 500 tsp | 2464.460797 mL |
| 1000 tsp | 4928.921594 mL |
Related conversions
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
What is the source unit in this conversion?
The source unit is the teaspoon (tsp). A US teaspoon is a customary volume unit equal to 4.92892159375 milliliters, commonly used in recipes.
What is the destination unit in this conversion?
The destination unit is the milliliter (mL). The milliliter is one-thousandth of a liter, a standard metric unit of volume.
How do I convert teaspoon to milliliter?
Multiply the teaspoon value by 4.928921594. For example, 10 tsp × 4.928921594 = 49.289216 mL.
Is the teaspoon to milliliter conversion exact?
Yes. This conversion uses a fixed factor defined for cooking measurement standards, so results are consistent every time.
Where is this conversion commonly used?
It's used when following recipes, adjusting ingredient quantities, or converting between US customary and metric cooking measurements.
Can I convert milliliter back to teaspoon?
Yes. Multiply the milliliter value by 0.2028841362 to get teaspoon.
Reserved between the FAQ and the article so the page stays balanced.
About this conversion
This page converts teaspoon (tsp) to milliliter (mL) within the cooking converter.
A US teaspoon is a customary volume unit equal to 4.92892159375 milliliters, commonly used in recipes. The milliliter is one-thousandth of a liter, a standard metric unit of volume.
The formula is mL = tsp × 4.928921594, based on each unit's fixed relationship to the cooking converter's reference units.
Results are consistent because the conversion relies on a fixed numerical ratio rather than an estimate.
Use the calculator above for instant results, or the table below for common teaspoon values already converted to milliliter.