Teaspoons to mL Converter
Convert teaspoons to milliliters instantly — 1 US tsp = 4.93 mL, 2 tsp = 9.86 mL. Ideal for recipes and medicine doses. Both directions.
About the Teaspoons to mL Converter
This free teaspoons to mL converter uses the US teaspoon of 4.92892 mL. Enter teaspoons to get milliliters or milliliters to get teaspoons — the fields convert both ways live.
Small volumes are where accuracy counts: half a teaspoon of baking soda is 2.46 mL, 2 tsp of vanilla is 9.86 mL, and a medicine label saying "one teaspoon" means 5 mL — the metric teaspoon doctors and syringes use. Converting properly matters for children's medicine doses, yeast and salt in baking, and concentrated flavorings where a spoonful too much shows.
The reference table covers quarter-teaspoon steps up to 12 tsp (a quarter cup). Remember 3 tsp = 1 tbsp.
How to Use the Teaspoons to mL Converter
- 1Enter a number of teaspoons — milliliters appear instantly.
- 2Or type mL to convert back to teaspoons.
- 3Copy the result, or use the table for common baking amounts.
Frequently Asked Questions
How many mL is 1 teaspoon?
1 US teaspoon equals 4.92892 mL, commonly rounded to 5 mL. The metric teaspoon — used for medicine dosing worldwide — is exactly 5 mL, so the difference is only 1.4%.
Is a teaspoon of medicine 5 mL?
Yes — pharmacy and pediatric dosing treat 1 teaspoon as exactly 5 mL, and dosing syringes are marked accordingly. Never use household cutlery, though: actual table spoons vary from 3 to 7 mL, which is dangerous for children's medicines.
How many mL is half a teaspoon?
Half a US teaspoon is 2.46 mL (or 2.5 mL metric). A quarter teaspoon is 1.23 mL and an eighth — the "pinch" measure in many spice blends — is 0.62 mL.
How many teaspoons is 10 mL?
10 mL equals 2.03 US teaspoons — effectively 2 metric teaspoons. Cough syrup doses of 10 mL are therefore "two teaspoons" on the label; 15 mL equals 3 tsp or 1 tablespoon.
How many teaspoons are in a tablespoon and a cup?
3 teaspoons = 1 tablespoon (14.79 mL) and 48 teaspoons = 1 US cup (236.6 mL). So 12 tsp is a quarter cup at 59.1 mL — useful when you've lost every measuring spoon except one.