Teaspoons to Milliliters Converter tsp → mL

1 teaspoon (us) (tsp) = 4.928921594 milliliters (mL). Type a value below — the conversion happens instantly, entirely on your device.

From

1 tsp = 4.928921594 mL

Precision

1 teaspoons = 4.9289216 milliliters

1 × 4.92892 = 4.9289216

1 tsp equals 4.92892 mL, so multiplying by 4.92892 converts the value. The result describes the exact same quantity — only the measuring stick changes.

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How to convert teaspoons to milliliters

milliliters = teaspoons × 4.928921594 — multiply the teaspoon (us) value by 4.92892.

Example: 10 tsp = 49.2892 mL.

To convert the other way: teaspoons = milliliters ÷ 4.928921594

Teaspoons to Milliliters conversion table

Teaspoons (tsp)	Milliliters (mL)
0.1	0.49289216
0.25	1.2322304
0.5	2.4644608
1	4.9289216
2	9.8578432
3	14.786765
4	19.715686
5	24.644608
6	29.57353
7	34.502451
8	39.431373
9	44.360294
10	49.289216
15	73.933824
20	98.578432
25	123.22304
30	147.86765
40	197.15686
50	246.44608
75	369.66912
100	492.89216
250	1232.2304
500	2464.4608
1000	4928.9216

About the units

What is a teaspoon (us)?

A US teaspoon (tsp) is exactly 4.92892 mL — one third of a tablespoon. Recipe amounts of spices, salt and baking powder are given in teaspoons.

What is a milliliter?

A milliliter (mL) is one thousandth of a liter, identical to one cubic centimeter (cc). Medicine doses and small liquid amounts are measured in milliliters.

Frequently asked questions

How many milliliters are in 1 teaspoon (us)?

1 teaspoon (us) (tsp) = 4.928921594 milliliters (mL).

What is the formula to convert teaspoons to milliliters?

milliliters = teaspoons × 4.928921594 — multiply the teaspoon (us) value by 4.92892.

How do I convert tsp to mL without a calculator?

Multiply by 4.93 for a close estimate. Exact factor: 1 tsp = 4.928921594 mL.

Is this tsp-to-mL converter accurate and private?

Yes. It uses the exact internationally defined conversion factors and computes results locally in your browser — your input is never sent to a server, and the page keeps working offline.