UrbiTools

teaspoons to ml Converter

Convert US teaspoons to millilitres and back — instant, exact, and free. Built for recipes and sachets written in tsp when your measure is marked in ml. Everything runs in your browser; nothing is uploaded.

Convert teaspoons ⇄ ml

4.9289 ml
1 tsp = 4.9289 ml (US teaspoons)

Formula: 1 tsp × 4.92892 = 4.9289 ml

How the teaspoons to ml conversion works

The US teaspoon is defined as 4.92892 ml (a third of a US tablespoon), so the conversion is a single multiplication: ml = tsp × 4.92892. Going the other way, tsp = ml ÷ 4.92892.

Worked example: 2 tsp of vanilla extract is 2 × 4.92892 = 9.8578 ml — about 9.86 ml. A 5 ml medicine spoon holds 5 ÷ 4.92892 ≈ 1.01 tsp.

For cooking, the US and 5 ml metric teaspoons are interchangeable. For medicine they are not — always dose with a proper syringe or the supplied cup, never a kitchen spoon.

teaspoons to ml questions

How many ml are in a teaspoon?
One US teaspoon is 4.92892 ml. Type any amount above to convert it both ways.
What is the teaspoons to ml formula?
Multiply teaspoons by 4.92892: ml = tsp × 4.92892. To go back, divide: tsp = ml ÷ 4.92892.
Is a US teaspoon the same as a metric teaspoon?
Almost. The US teaspoon is 4.92892 ml; the metric teaspoon used in the UK, Australia and New Zealand is exactly 5 ml — about 1.4% bigger. Close enough for cooking, but not for medicine.
How many teaspoons is 10 ml?
About 2.03 tsp (10 ÷ 4.92892).
Can I use a kitchen teaspoon to measure medicine?
No. Kitchen teaspoons vary in size — use the dosing syringe or cup that came with the medicine, and follow the mg-per-ml concentration on the label.

More converters

mg to ml ConverterMilligrams to millilitres with density presets.ml to oz ConverterMillilitres to US fluid ounces and back.Liters to Gallons ConverterLitres to US or UK (imperial) gallons.Steps to km ConverterSteps to kilometres with adjustable stride length.cups to ml ConverterUS cups to millilitres and back.kg to lbs ConverterKilograms to pounds and back.Fahrenheit to Celsius ConverterFahrenheit to Celsius and back.grams to cups ConverterGrams to US cups with ingredient presets — flour, sugar, butter and more.ounces to grams ConverterOunces to grams and back — exact 28.3495 g per ounce.tablespoons to ml ConverterUS tablespoons to millilitres and back.grams to tablespoons ConverterGrams to US tablespoons with ingredient presets.liters to quarts ConverterLitres to US quarts and back.cups to tablespoons ConverterUS cups to tablespoons and back — 16 tbsp per cup.tablespoons to teaspoons ConverterTablespoons to teaspoons and back — 1 tbsp = 3 tsp.pints to cups ConverterUS pints to cups and back — 1 pint = 2 cups.quarts to cups ConverterUS quarts to cups and back — 1 quart = 4 cups.grams to ml ConverterGrams to millilitres with ingredient presets.gallons to cups ConverterGallons to cups and back — 16 cups per gallon.liters to pints ConverterLitres to US or UK pints — the pint of beer and milk.fluid ounces to cups ConverterFluid ounces to US cups and back — 8 fl oz per cup.teaspoons to cups ConverterTeaspoons to US cups and back — 48 tsp per cup.ml to liters ConverterMillilitres to litres and back — divide by 1,000.stone to kg ConverterStones to kilograms and back — exact 6.35029 kg per stone.

Sources & official guidance

Estimate only — not medical advice. See our disclaimer.