How Many Milliliters in a Teaspoon?

Answer

4.929 ml

There are 4.929 milliliters in 1 US teaspoon.

UK: 1 metric teaspoon (5 ml) = 5 ml

Exact: 1 tsp = 4.92892159375 ml

Teaspoons to Milliliters conversion chart

Teaspoons to milliliters (US units)
Teaspoons	Milliliters
one eighth teaspoon	0.6161
one quarter teaspoon	1.232
one half teaspoon	2.464
three quarters teaspoon	3.697
1 tsp	4.929
1 and one half teaspoons	7.393
2 tsp	9.858
3 tsp	14.79
4 tsp	19.72
5 tsp	24.64
6 tsp	29.57
8 tsp	39.43
9 tsp	44.36
10 tsp	49.29
12 tsp	59.15
15 tsp	73.93
16 tsp	78.86
18 tsp	88.72
24 tsp	118.3
36 tsp	177.4
48 tsp	236.6

How Many Milliliters in a Teaspoon - Tsp to ml — Teaspoons to milliliters chart from 1/8 tsp to 48 tsp, as a card to save or print.

How to convert teaspoons to milliliters

milliliters = teaspoons × 4.92892

Example: 4 tsp × 4.92892 = 19.72 ml.

Find out how many milliliters are in a teaspoon. Convert teaspoons to milliliters instantly, see a chart from 1/8 to 48 teaspoons and get the exact formula. — On the scale, 1 teaspoon lines up with 4.929 milliliters; read any other amount straight across.

Multiply US teaspoons by 4.929 to get milliliters (millilitres). Rounding each teaspoon to 5 ml is fine for cooking and matches the metric teaspoon exactly.

Three teaspoons make a tablespoon, so that tablespoon comes to 14.79 ml. Six teaspoons make one US fluid ounce, or 29.57 ml, and twelve make 1/4 cup, or 59.15 ml.

When a recipe gives several teaspoons of a liquid, such as vanilla or lemon juice, a small measuring glass marked in ml can be easier than counting spoons. The teaspoons to tablespoons converter helps once the count climbs past three.

US vs UK teaspoons

Outside the US, recipes use a metric teaspoon of exactly 5 ml. It is so close to the US spoon, 4.93 ml, that one set of measuring spoons serves both kinds of recipe.

US nutrition labels round the same way. Under FDA labeling rules, a teaspoon on a label means 5 ml, so a serving of 1 tsp reads as 5 ml.

teaspoon sizes by country
Unit	Size	Used in
US teaspoon	4.929 ml	US
metric teaspoon	5 ml	UK, Australia, Canada, New Zealand

Measuring fractions of a teaspoon in milliliters

Baking recipes may call for less than a teaspoon of salt, baking soda or vanilla. In milliliters, the common spoon sizes hold:

1/8 tsp: 0.6161 ml
1/4 tsp: 1.232 ml
1/2 tsp: 2.464 ml
3/4 tsp: 3.697 ml

These amounts are volumes, so they hold for any ingredient. The weight of a 1/4 tsp of salt and a 1/4 tsp of flour differs, but the space they fill is the same.

Teaspoons and milliliters: questions

Is 1 teaspoon 5 ml?

Close enough for any recipe. The metric teaspoon is exactly 5 ml, and the US one is only slightly smaller. US food labels also treat a teaspoon as 5 ml.

How many ml are in 2 teaspoons?

Two US teaspoons hold 9.858 ml, which rounds to 10 ml. With metric spoons, the answer is exactly 10 ml. It is also two thirds of a tablespoon, and two teaspoons of vanilla reach the 10 ml line of a small measuring glass.

Is a teaspoon 5 ml or 2.5 ml?

A teaspoon is about 5 ml, and 2.5 ml is half of one. A US half-teaspoon holds 2.464 ml, so the 2.5 ml line on a syringe matches it closely.

How many ml is a heaping teaspoon?

There is no set figure. A heaping spoon holds the level 4.929 ml plus a mound on top, and the size of that mound depends on the ingredient and on who fills the spoon. Recipes that need accuracy call for level spoons.

Related conversions

Sources: Unit definitions: NIST Handbook 44 · Last reviewed Sep 27, 2026 · Report an error