Tsp to ML Converter: How Many ML Is a Teaspoon?

Last updated October 10, 2026

One teaspoon equals 5 ml in recipes, and the exact US value is 4.93 ml. NIST lists the US customary teaspoon at 4.929 ml, while the FDA uses 5 ml on food labels. Metric countries such as the UK, Canada, Australia and New Zealand also use a 5 ml teaspoon. So for any tsp to ml conversion, multiply the teaspoons by 5.

Tsp to ML Converter

Type an amount, choose teaspoons or ml, and read the answer right away. The converter also shows tablespoons once the amount reaches 15 ml. Every result matches the charts on this page.

Amount

tsp

Spoon size

Quick (tsp):

Result

5 ml

5 ml (recipes, labels, metric)

0.34 tbsp0.17 fl oz0.02 US cups

ML in a Teaspoon by Country

The ml in a teaspoon is almost the same everywhere, unlike the tablespoon. Most countries use a 5 ml teaspoon, including Australia, where only the tablespoon is larger. The US customary teaspoon is 4.93 ml, just 0.07 ml less.

Teaspoon	ML	Where you see it	Source
US customary	4.93 ml	US measuring spoons	NIST
US label	5 ml	Nutrition Facts labels	FDA
Metric	5 ml	UK, Canada, Australia, New Zealand	Teaspoon

How Many ML Is a Teaspoon From the Cutlery Drawer?

A spoon from your cutlery drawer is not a measuring teaspoon. In a 2010 study in the International Journal of Clinical Practice, 71 household teaspoons held anywhere from 2.5 to 7.3 ml (ScienceDaily). That means a drawer teaspoon can hold half the real amount or nearly one and a half times as much. Use a measuring spoon for cooking and an ml syringe for medicine.

Tsp to ML Chart

This chart shows common teaspoon amounts in ml for a 5 ml spoon and the exact US spoon. Use the first ml column for recipes and medicine labels. The exact US column is only for precise math.

Teaspoons	Recipe ml (5 ml spoon)	Exact US ml
1/8 tsp	0.625 ml	0.62 ml
1/4 tsp	1.25 ml	1.23 ml
1/2 tsp	2.5 ml	2.46 ml
3/4 tsp	3.75 ml	3.70 ml
1 tsp	5 ml	4.93 ml
1 1/4 tsp	6.25 ml	6.16 ml
1 1/2 tsp	7.5 ml	7.39 ml
2 tsp	10 ml	9.86 ml
2 1/2 tsp	12.5 ml	12.32 ml
3 tsp (1 tbsp)	15 ml	14.79 ml
4 tsp	20 ml	19.72 ml
5 tsp	25 ml	24.64 ml
6 tsp (2 tbsp)	30 ml	29.57 ml

1/2 Tsp to ML

Half a teaspoon is 2.5 ml, and a quarter teaspoon is 1.25 ml. Three quarters of a teaspoon is 3.75 ml, and 1 1/2 teaspoons is 7.5 ml. These small amounts are common for baking soda, salt, vanilla and spices.

ML to Tsp Chart

To change ml to teaspoons, divide the ml by 5. The last column rounds to the nearest 1/4 teaspoon, since most measuring spoon sets go down to 1/4 or 1/8 teaspoon. From 15 ml up, it switches to tablespoons.

ML	Teaspoons	Spoons to use
0.5 ml	0.10	under 1/8 tsp
1 ml	0.20	1/4 tsp
1.25 ml	0.25	1/4 tsp
2 ml	0.40	1/2 tsp
2.5 ml	0.50	1/2 tsp
3 ml	0.60	1/2 tsp
4 ml	0.80	3/4 tsp
5 ml	1.00	1 tsp
7.5 ml	1.50	1 1/2 tsp
10 ml	2.00	2 tsp
12.5 ml	2.50	2 1/2 tsp
15 ml	3.00	1 tbsp
20 ml	4.00	1 tbsp plus 1 tsp
25 ml	5.00	1 tbsp plus 2 tsp
30 ml	6.00	2 tbsp

2.5 ML, 5 ML and 10 ML in Teaspoons

2.5 ml is 1/2 teaspoon, 5 ml is 1 teaspoon, and 10 ml is 2 teaspoons. You often see these amounts on liquid medicine labels. When you do, measure them with the syringe or cup that comes with the medicine.

Teaspoons, Tablespoons, Fluid Ounces and Cups

Teaspoons fit neatly into the other US kitchen units. Three teaspoons make 1 tablespoon, 6 teaspoons make 1 fluid ounce, and 48 teaspoons make 1 cup. The exact ml values come from NIST.

Unit	Teaspoons	Exact ml
1 teaspoon	1 tsp	4.93 ml
1 tablespoon	3 tsp	14.79 ml
1 fluid ounce	6 tsp	29.57 ml
1/4 cup	12 tsp	59.15 ml
1 cup	48 tsp	236.59 ml

Measure Medicine in ML, Not Teaspoons

A dosing paper published by the FDA links kitchen spoons to dosing errors and calls oral syringes the more precise choice. The American Academy of Pediatrics recommends giving children’s liquid medicine in ml only. If an older label says 1 teaspoon, measure 5 ml with an ml syringe or dosing cup. Ask a pharmacist if you are not sure.

How to Convert Teaspoons and ML

You only need one number: 5 ml in each teaspoon. Multiply teaspoons by 5 to get ml, or divide ml by 5 to get teaspoons. For exact US math, use 4.93 instead.

Teaspoons to ML

Multiply the teaspoons by 5. For 1 3/4 teaspoons, 1.75 × 5 = 8.75 ml. For 4 teaspoons, 4 × 5 = 20 ml.

ML to Teaspoons

Divide the ml by 5. For 12 ml, 12 ÷ 5 = 2.4 teaspoons. Rounded to the nearest 1/4 teaspoon, that is 2 1/2 teaspoons.

Tips for Measuring Small Amounts

Small spoons leave little room for error, so a few habits help. These tips keep each teaspoon close to 5 ml. Each one fixes a common mistake.

Use measuring spoons. A teaspoon from the cutlery drawer can hold 2.5 to 7.3 ml.
Pour over a small bowl. If a liquid overflows, it will not spill into your batter.
Level dry ingredients. Sweep the top flat with the back of a knife for baking soda, salt and spices.
Keep a 1/8 teaspoon spoon. Many sets include one, and it makes 0.625 ml amounts easy.
Use an oral syringe for medicine. It shows ml lines and gives the most precise dose.

Frequently asked questions

How many ml is a teaspoon?

One teaspoon is 5 ml in recipes and on labels. The exact US customary teaspoon is 4.93 ml. The difference is too small to matter in cooking.

How many ml is 2 teaspoons?

Two teaspoons are 10 ml, or 9.86 ml exactly. That is 2/3 of a tablespoon. Four teaspoons make 20 ml.

How many ml is 1/2 teaspoon?

Half a teaspoon is 2.5 ml. Most measuring spoon sets include a 1/2 teaspoon spoon. A quarter teaspoon is 1.25 ml.

How many ml is 3/4 teaspoon?

Three quarters of a teaspoon is 3.75 ml. You can measure it with a 1/2 teaspoon plus a 1/4 teaspoon. The exact US value is 3.70 ml.

How many ml is 1.5 teaspoons?

1.5 teaspoons is 7.5 ml. That is the same as half a tablespoon. Use a 1 teaspoon spoon plus a 1/2 teaspoon spoon.

How many teaspoons are in 1 ml?

One ml is 0.2 teaspoon, or 1/5 of a teaspoon. That is a little less than 1/4 teaspoon. For amounts this small, an ml syringe is the most accurate tool.

Is a teaspoon 5 ml in Australia and the UK?

Yes. The UK, Australia, Canada and New Zealand all use a 5 ml teaspoon. Only the Australian tablespoon is different, at 20 ml instead of 15 ml.

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Sources

About This Converter

This page was written for home cooks and parents who need small, exact amounts. Our exact teaspoon value comes from NIST, and the 5 ml label value comes from the FDA. The converter, the charts and the answers all use the same numbers, so they always match. We review the page every quarter and show the date at the top.