Teaspoons to milliliters converter

Common teaspoon and milliliter conversions

US teaspoon, used in cooking and most medicine:

• 1 teaspoon = 4.93 ml (rounded to 5 ml)
• 1/2 teaspoon = 2.5 ml
• 1/4 teaspoon = 1.25 ml
• 1/8 teaspoon = 0.6 ml
• 2 teaspoons = 10 ml
• 3 teaspoons = 1 tablespoon = 15 ml
• 6 teaspoons = 1 fluid ounce = 30 ml
• 1 cup = 48 teaspoons = 237 ml

How the tool works

A US teaspoon is 4.92892159 milliliters. Cooking and dosing round this to a clean 5 ml, and most measuring spoons are made to the 5 ml standard.

The tool converts your input to milliliters, then to any unit you want, so teaspoons to milliliters, teaspoons to tablespoons, and teaspoons to cups all work from the one tool.

The 4.93 vs 5 ml question

The exact US teaspoon is 4.93 ml. The metric teaspoon, and almost every measuring spoon sold, is 5 ml. The 1.4 percent gap is too small to matter for cooking.

For medicine, use the 5 ml metric standard. A dosing syringe or the cap on the bottle is marked in milliliters and is more accurate than a kitchen spoon.

Never measure medicine with a regular tableware spoon. A stirring spoon can hold anywhere from 3 to 7 ml; only a marked measuring spoon or syringe is reliable.

Teaspoons around the world

The teaspoon is one of the most consistent units worldwide. The US, UK, Canada, and the metric standard all use a 5 ml teaspoon, with the US technically at 4.93 ml. The tablespoon is the unit that varies: 15 ml in most places, but 20 ml in Australia.

Common teaspoon and milliliter mistakes

• Measuring medicine with a kitchen or tableware spoon. Use a 5 ml dosing spoon or a syringe.
• Heaping a teaspoon that was meant to be level. A heaped teaspoon can be 7 to 8 ml instead of 5.
• Confusing teaspoons (tsp) with tablespoons (tbsp). A tablespoon is three teaspoons, 15 ml.
• Assuming an Australian teaspoon is bigger. It is not; only the Australian tablespoon is bigger at 20 ml.

FAQ

How many ml is a teaspoon?

1 US teaspoon is 4.93 milliliters, rounded to 5 ml for cooking and medicine.

How many ml is 1/2 teaspoon?

1/2 teaspoon is about 2.5 milliliters.

Is a teaspoon 5 ml or 4 ml?

5 ml. The exact US teaspoon is 4.93 ml, and the metric teaspoon is exactly 5 ml. Measuring spoons are made to 5 ml.

How many ml is 1/4 teaspoon?

1/4 teaspoon is about 1.25 milliliters.

How many teaspoons is 10 ml?

10 milliliters is 2 teaspoons.

Related tools and guides

• Teaspoons to tablespoons
• Tablespoons to milliliters
• Cups to milliliters
• Wet vs dry measuring cups
• All calculators

Where these numbers come from

The US teaspoon is defined as 1/6 of a US fluid ounce, exactly 4.92892159375 milliliters. The metric teaspoon is defined as exactly 5 milliliters. Measuring spoons are manufactured to the 5 ml metric value.