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18 Milliliters to Teaspoons

18 milliliters equals 3.65 teaspoons. Use the formula, worked example, and conversion table below to check the math.

18 mL = 3.65 tsp
mL × 0.202884 = tsp
Try: 13 mL to tsp 17 mL to tsp 19 mL to tsp 23 mL to tsp
18 mL is also
18 mL = 0.018 L 18 mL = 0.004755 gal 18 mL = 0.0761 cup 18 mL = 0.6087 fl oz 18 mL = 0.038 pt 18 mL = 0.019 qt 18 mL = 1.22 tbsp
mL
3.65 tsp

Step-by-Step Calculation

mL × 0.202884 = tsp
  1. Start with 18 mL
  2. Multiply by 0.202884: 18 × 0.202884 = 3.65
  3. Result: 18 mL = 3.65 tsp

This conversion factor (0.202884) is the same for every milliliter to teaspoon calculation.

Milliliter to Teaspoon Conversion Table

Milliliters (mL) Teaspoons (tsp)
1 mL 0.2029 tsp
2 mL 0.4058 tsp
5 mL 1.01 tsp
10 mL 2.03 tsp
15 mL 3.04 tsp
18 mL 3.65 tsp
20 mL 4.06 tsp
25 mL 5.07 tsp
50 mL 10.14 tsp
75 mL 15.22 tsp
100 mL 20.29 tsp
250 mL 50.72 tsp
500 mL 101.44 tsp
1,000 mL 202.88 tsp
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Frequently Asked Questions

18 milliliters equals 3.65 teaspoons.
The formula is: mL × 0.202884 = tsp. See the mL to tsp formula page for worked examples.
Use the teaspoons to milliliters converter. The reverse formula is: tsp × 4.928922 = mL.
The calculator uses the full-precision conversion factor for accuracy. Table values and displayed results are rounded for readability.
The conversion formula (mL × 0.202884 = tsp) is based on internationally defined standards. Displayed results are rounded for readability, while the calculator uses the full-precision factor.
person Written by Sean Day verified Reviewed by UnitCompare update Last updated Mar 28, 2026