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teaspoon (tsp) → milliliter (mL)

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Use our free online converter to convert between units instantly. Enter any value in the field above to get accurate results. No signup or download required—all conversions run in your browser. Our calculator uses standard conversion factors for reliability.

0
tsp=mL
0.01=0.049289
0.1=0.492892
1=4.92892
2=9.85784
3=14.78676
5=24.6446
10=49.2892
20=98.5784
50=246.446
100=492.892
1000=4,928.92

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Brief explanation: teaspoon to milliliter

Liter is the base volume unit in the metric system. US gallon = 3.78 L. Cup = 236 ml. Tablespoon = 15 ml, teaspoon = 5 ml. Volume measures how much space a substance occupies. The metric system (L, mL) is used worldwide. US customary units (gal, cup, tbsp, tsp) are common in American recipes. When converting, use the exact factors for accuracy—especially in cooking and chemistry.

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Common conversion examples: teaspoon to milliliter

Reference values for quick comparison. Use the converter above for any amount.

  • 1 teaspoon=4.9289 milliliter
  • 5 teaspoon=24.6446 milliliter
  • 10 teaspoon=49.2892 milliliter

About the Units

teaspoon (tsp)

Definition: A teaspoon (tsp) is a unit of volume. In the US, one teaspoon equals approximately 4.929 mL or 1/3 tablespoon. It is the smallest common cooking measure.
History: The teaspoon derived from the size of spoons used for tea. It became a standard cooking measure. US and metric teaspoons are very close (5 mL in metric).
Current use: Teaspoons are used for spices, extracts, and small recipe amounts. Medication dosing often uses teaspoons (5 mL). It is the base for larger cooking measures.

milliliter (mL)

Definition: A milliliter (mL) is a unit of volume equal to one thousandth of a liter. There are 1,000 milliliters in one liter. One milliliter equals one cubic centimeter. It is used for small liquid volumes.
History: The milliliter emerged with the metric system for precise liquid measurements. It is convenient for recipes, medicine, and laboratory work where liters are too large.
Current use: Milliliters are used for medication doses, recipe ingredients, and laboratory volumes. Beverage nutrition labels and shot sizes use milliliters. One teaspoon is approximately 5 mL.

Sources

Conversion factors and unit definitions follow international standards. For authoritative references, see: