Precise Conversion Factor: 1 Milliliter (mL) = 0.2028841362 US Teaspoons (tsp) | 1 US tsp = 4.92892159 mL

mL to US Teaspoon Converter

Accurately convert between milliliters and US teaspoons using the precise conversion factor. Ideal for scientific, culinary, and pharmaceutical applications.

Current conversion: Milliliters → US Teaspoons
mL

Enter any non-negative number (e.g., 5, 7.5, 12.3)

tsp

Precision: 6 Decimal Places | Formula: tsp = mL × 0.2028841362

Precise Conversion Table

Milliliters (mL) Equals US Teaspoons (tsp)
1 mL = 0.2028841362 tsp
2 mL = 0.4057682724 tsp
3 mL = 0.6086524086 tsp
4 mL = 0.8115365448 tsp
5 mL = 1.014420681 tsp
10 mL = 2.028841362 tsp
15 mL = 3.043262043 tsp
25 mL = 5.072103405 tsp
50 mL = 10.14420681 tsp
100 mL = 20.28841362 tsp

US Teaspoons to Milliliters Conversion Table

US Teaspoons (tsp) Equals Milliliters (mL)
1 tsp = 4.92892159 mL
2 tsp = 9.85784318 mL
3 tsp (1 tbsp) = 14.78676477 mL
5 tsp = 24.64460795 mL
10 tsp = 49.2892159 mL

Quick Conversion Shortcuts

Milliliters → US Teaspoons

About This Conversion

Conversion Formulas

Milliliters to US Teaspoons

tsp = mL × 0.2028841362

Example: 15 mL × 0.2028841362 = 3.043262043 tsp

US Teaspoons to Milliliters

mL = tsp × 4.92892159

Example: 3 tsp × 4.92892159 = 14.78676477 mL

Precision Matters

Scientific Applications

This precise conversion is essential for scientific experiments, pharmaceutical measurements, and any application requiring high accuracy.

Culinary Uses

For most home cooking, rounding to 5 mL = 1 tsp works well. However, professional baking and specialized recipes benefit from this precise conversion.

Frequently Asked Questions

The 5 mL = 1 tsp conversion is a common approximation for everyday use. However, the precise measurement of a US teaspoon is defined as exactly 4.92892159 mL, which translates to 1 mL = 0.2028841362 tsp. This converter uses this exact value for applications requiring precision.

Yes, teaspoon measurements vary slightly by country:

  • US teaspoon: 4.92892159 mL
  • UK teaspoon: 5.91939 mL
  • Australian teaspoon: 5 mL
  • Metric teaspoon: Exactly 5 mL

This converter specifically uses the US teaspoon measurement standard.

This precise conversion is particularly useful in:

  • Pharmaceutical compounding and medication dosing
  • Scientific experiments and laboratory work
  • Professional baking and pastry making
  • Industrial food production
  • Quality control and regulatory compliance

For most home cooking, the small difference between the approximate (5 mL = 1 tsp) and precise conversion is negligible.

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