AI Unit Converters
v1.0

Teaspoon (US) to Milliliter Converter

1 Teaspoon (US) is equal to 4.928922Milliliters (mL). To convert teaspoon (us)s to milliliters, multiply the value by 4.928922 or use the interactive formula breakdown and reference tables below.

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Volume Converter

Formula: --
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Step-by-Step Mathematical Derivation

Verified SI Standard
➡️ Convert Teaspoon (US) to Milliliter
Value in mL = Value in tsp × 4.928922

To convert any quantity from Teaspoon (US) to Milliliter, multiply the quantity by the constant conversion factor 4.928922.

⬅️ Convert Milliliter to Teaspoon (US) (Inverse)
Value in tsp = Value in mL × 0.2028841

To reverse the operation, multiply your Milliliter figure by 0.2028841 (or divide by 4.928922).

🔢 Step-by-Step Calculation Procedure:
  1. Identify the starting value in Teaspoon (US) (tsp).
  2. Apply the exact linear conversion factor: 1 tsp = 4.928922 mL.
  3. Multiply the input value by 4.928922 to obtain the exact measurement in Milliliter (mL).
  4. Verify precision against standard BIPM / NIST SP 811 statutory guidelines.
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All-Units Instant Matrix

Live Computed
Liter --
L
Milliliter --
mL
Cubic Meter --
m³
Gallon (US) --
gal
Gallon (Imperial) --
imp gal
Quart (US) --
qt
Pint (US) --
pt
Cup (US Customary) --
cup
Fluid Ounce (US) --
fl oz
Tablespoon (US) --
tbsp
Teaspoon (US) --
tsp
Cubic Foot --
ft³
Cubic Inch --
in³
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Printable Reference Cheat Sheet

Generate clean offline reference PDF tables for Volume & Liquid

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Academic & Research Citation Exporter

Cite this mathematical formula and conversion factor in research papers and wikis

BibTeX / APA / IEEE 
@misc{ai_unit_converter_teaspoon_(us)_to_milliliter,
  author       = {AI Unit Converters Standards Board},
  title        = {Exact Teaspoon (US) to Milliliter Conversion Factor and Mathematical Derivation},
  year         = {2026},
  howpublished = {\url{https://aiunitconverters.com/volume/tsp_us-to-ml}},
  note         = {Derived from NIST Special Publication 811 and BIPM SI Brochure}
}

📊Teaspoon (US) to Milliliter Conversion Tables

Teaspoon (US)s (tsp)Milliliters (mL)
1tsp4.9289mL
2tsp9.8578mL
5tsp24.6446mL
10tsp49.2892mL
15tsp73.9338mL
20tsp98.5784mL
25tsp123.223mL
50tsp246.4461mL
75tsp369.6691mL
100tsp492.8922mL
250tsp1,232.2304mL
500tsp2,464.4608mL
1000tsp4,928.9216mL
5000tsp24,644.608mL
10000tsp49,289.2159mL
Milliliters (mL)Teaspoon (US)s (tsp)
1mL0.2029tsp
2mL0.4058tsp
5mL1.0144tsp
10mL2.0288tsp
15mL3.0433tsp
20mL4.0577tsp
25mL5.0721tsp
50mL10.1442tsp
75mL15.2163tsp
100mL20.2884tsp
250mL50.721tsp
500mL101.4421tsp
1000mL202.8841tsp
5000mL1,014.4207tsp
10000mL2,028.8414tsp
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❓ Frequently Asked Questions: Teaspoon (US) to Milliliter

How do you convert Teaspoon (US)s to Milliliters?▼

1 Teaspoon (US) is equal to 4.928922 Milliliters. Multiply your input value in Teaspoon (US)s by 4.928922 to obtain the exact equivalent in Milliliters.

How many Milliliters are in 1 Teaspoon (US)?▼

There are exactly 4.928922Milliliters (mL) in 1 Teaspoon (US) (tsp).

Are these calculations calibrated against official measurement standards?▼

Yes. All conversion factors on AI Unit Converters are calibrated and cross-verified against official BIPM SI Brochure (9th Edition), NIST SP 811, and ISO 80000 measurement metrology standards.

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