Convert milliliter to teaspoon (US).
mL to tsp-us — formula, reference values, and a live converter.
Convert milliliter (mL) to teaspoon (US) (tsp-us). This is a fixed-ratio conversion — multiply the input by the factor below.
Formula
tsp-us = mL × 0.202884
Reference values
| mL (milliliter) | tsp-us (teaspoon (US)) |
|---|---|
| 1 mL | 0.20288 tsp-us |
| 2 mL | 0.40577 tsp-us |
| 5 mL | 1.0144 tsp-us |
| 10 mL | 2.0288 tsp-us |
| 25 mL | 5.0721 tsp-us |
| 50 mL | 10.144 tsp-us |
| 100 mL | 20.288 tsp-us |
| 500 mL | 101.44 tsp-us |
| 1000 mL | 202.88 tsp-us |
Things to watch for
- US and UK gallons are different. 1 US gal = 3.785 L; 1 UK (imperial) gal = 4.546 L. Recipes from the UK will not work with US cups.
- Volume scales as the cube of length: doubling a container's dimensions multiplies volume by 8, not 2.
- For viscous or compressible fluids, volume changes with temperature and pressure. Specify conditions for precise work.
What is a milliliter?
One milliliter equals exactly one cubic centimeter (1 ml = 1 cm³) or one-thousandth of a liter. Liquid medicine dosing, recipe ingredients, and laboratory measurement.
What is a US teaspoon?
One US teaspoon equals exactly one-third of a US tablespoon or about 4.93 milliliters. American cooking recipes and small-dose liquid medications.
Everyday reference points for ml
To put the unit in perspective, here are a few real-world examples. 30 ml is about a shot glass; 250 ml is about a typical glass of water; and 500 ml is about a standard water bottle.
How to convert milliliter to US teaspoon
To convert a value from milliliter (ml) to US teaspoon (tsp (US)), apply the conversion factor shown in the formula above. The calculation is the same whether you do it by hand, in a spreadsheet, or with the live converter on this page.
Steps:
- Take your input value in ml.
- Apply the formula
tsp-us = mL × 0.202884. - The result is your value in tsp (US).
For repeated calculations, save the formula in a spreadsheet or use the live converter at the top of this page — it handles the math automatically and displays the result as you type.
Frequently asked questions
How do I convert ml to tsp (US)?
Apply the formula ml → tsp (US) shown above, or just type your value into the converter at the top of this page. The result updates instantly.
Which is bigger, ml or tsp (US)?
This depends on the conversion ratio in the formula. If the factor multiplied by your value gives a larger number, then tsp (US) is the smaller unit (so it takes more of them to express the same quantity). If the result is smaller, then tsp (US) is the larger unit.
When would I use ml versus tsp (US)?
Both units measure volume, so the choice depends on context. Milliliter is typically used for cooking, beverages, fuel, and industrial fluid handling; US teaspoon similarly. Most professional fields standardize on one or the other based on regional conventions or technical tradition.
How precise is this ml to tsp (US) conversion?
The conversion factor shown is the internationally defined exact value (or the best-published approximation if the relationship is irrational, like degrees-to-radians). The live converter on this page uses double-precision floating-point math, accurate to about 15 significant digits — far beyond any practical engineering need.
Is the conversion ratio exact, or an approximation?
Most unit conversions between SI metric units, and between SI and US customary units, have been formally defined as exact values since the 1959 international yard-pound agreement and subsequent SI redefinitions. Exceptions are unit pairs that involve irrational numbers (radians, e.g.) or empirical conversions (like food calories, which depend on temperature). When in doubt, consult the formula at the top of this page.
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