Teaspoons to mL Converter — Tsp to Milliliters Calculator

What Is a Teaspoons to Milliliters Converter?

The teaspoon-to-milliliter conversion is critical in both cooking and medicine. For cooking, teaspoons measure small quantities of spices, extracts, and leavening agents where precision matters — too much baking soda can ruin a recipe. For medicine, the FDA warns against using kitchen teaspoons for liquid medications because household teaspoons can vary from 3-7 mL, potentially causing incorrect dosing. Always use a calibrated measuring device for medications.

The Conversion Formula

The formula to convert teaspoons to milliliters is:

Milliliters = Teaspoons × 4.92892

The reverse formula is: Teaspoons = Milliliters ÷ 4.92892

Teaspoons to Milliliters Reference Table

Teaspoons (tsp)	Milliliters (mL)
0.25 tsp	1.23 mL
0.5 tsp	2.46 mL
0.75 tsp	3.70 mL
1 tsp	4.93 mL
1.5 tsp	7.39 mL
2 tsp	9.86 mL
2.5 tsp	12.32 mL
3 tsp	14.79 mL
4 tsp	19.72 mL
5 tsp	24.64 mL
6 tsp	29.57 mL
8 tsp	39.43 mL
10 tsp	49.29 mL
12 tsp	59.15 mL
15 tsp	73.93 mL
20 tsp	98.58 mL
24 tsp	118.29 mL
32 tsp	157.73 mL
48 tsp	236.59 mL
96 tsp	473.18 mL

How to Use This Converter

Enter your teaspoons value in the input field above.
View the result — the milliliters equivalent appears instantly.
For manual conversion, use the formula: Milliliters = Teaspoons × 4.92892.
Check the reference table above for 20 pre-calculated common values.

Conversion Tips

One US teaspoon = 4.93 ml (commonly rounded to 5 ml). The 1.4% difference is negligible for cooking but matters for concentrated supplements and infant medications.
Baking powder and baking soda measurements are critical: 1 tsp (5 ml) of baking soda is roughly 4x more potent than 1 tsp of baking powder. An extra half-teaspoon of soda can make a recipe inedible.
Salt intake recommendations (2,300 mg/day max per AHA) equal about 1 teaspoon (5 ml) of table salt. Most people consume 3,400 mg daily. Measuring salt by the teaspoon makes limits tangible.

Related Conversions

All conversions are calculated client-side in your browser. No data is sent to any server. For the authoritative source on unit definitions, see the National Institute of Standards and Technology (NIST).

Frequently Asked Questions

How many mL are in a teaspoon?

One US teaspoon equals approximately 4.93 mL (commonly rounded to 5 mL). Medical dosing typically uses the 5 mL standard. Three teaspoons equal one tablespoon.

Is a teaspoon 5 mL or 4.93 mL?

A US teaspoon is officially 4.92892 mL, but the medical community standardizes it to 5 mL for dosing purposes. The difference (0.07 mL) is negligible for most cooking and medicine applications.

How do I measure medicine in teaspoons safely?

Use a proper medicine syringe or dosing cup marked in mL, not a kitchen teaspoon. Kitchen teaspoons vary in size (3-7 mL), which can lead to dangerous under- or over-dosing. The FDA recommends using mL-marked devices for all liquid medications.

How many teaspoons are in a tablespoon?

There are exactly 3 teaspoons in 1 tablespoon. This is one of the most fundamental cooking conversions: 1 tbsp = 3 tsp = ~15 mL.

Teaspoons to Milliliters Converter

Found this helpful?