Teaspoon to mL Converter

Understanding Teaspoon Measurements

The teaspoon is one of the most common small-volume measurements in cooking and medicine. One US teaspoon equals approximately 4.929 mL. In many countries, the metric teaspoon of exactly 5 mL is used instead, and this is the standard reference for medicine dosing. The difference between the two is small enough that it rarely matters in cooking, but it can be significant when measuring medication for children or precise baking ingredients.

This converter handles teaspoons alongside tablespoons, cups, milliliters, liters, and fluid ounces. Enter a value in any unit and all other units update instantly, making it easy to scale recipes up or down.

Common Teaspoon Conversions

The most frequently needed conversions: 1 US teaspoon = 4.929 mL, 3 teaspoons = 1 tablespoon, 6 teaspoons = 1 fluid ounce, 48 teaspoons = 1 US cup. For metric approximations, 1 teaspoon is roughly 5 mL, making mental math straightforward: 10 teaspoons is approximately 50 mL.

Teaspoons in Cooking vs. Medicine

In cooking, teaspoon measurements are forgiving. A slight variation between a US teaspoon (4.93 mL) and a metric teaspoon (5 mL) will not ruin a recipe. In medicine, however, the 5 mL metric teaspoon is the standard. Pharmacists recommend using a calibrated measuring device rather than a kitchen teaspoon, as actual kitchen teaspoons can vary from 2.5 mL to 7.3 mL depending on the spoon design.

Scaling Recipes with Teaspoons

When scaling recipes, converting teaspoons to tablespoons or cups keeps numbers manageable. Instead of measuring 12 teaspoons of an ingredient, use 4 tablespoons or a quarter cup. This converter makes these translations instant, so you can quickly determine the most practical measuring tool for any quantity.

Frequently Asked Questions

How many mL are in a teaspoon?

One US teaspoon equals approximately 4.929 mL. This is the standard used in American recipes and medicine dosing. A metric teaspoon, used in some countries, is exactly 5 mL.

How many teaspoons are in a tablespoon?

There are 3 US teaspoons in one US tablespoon. This means 1 tablespoon equals approximately 14.79 mL. For quick conversions: half a tablespoon is 1.5 teaspoons, and 2 tablespoons equal 6 teaspoons.

How many teaspoons are in a cup?

There are 48 US teaspoons in one US cup. This is because 1 cup equals 16 tablespoons, and each tablespoon equals 3 teaspoons (16 x 3 = 48). A quarter cup is 12 teaspoons and half a cup is 24 teaspoons.

Is a teaspoon 5 mL or 4.93 mL?

A US teaspoon is approximately 4.929 mL, while a metric teaspoon is exactly 5 mL. In medicine and pharmacology, the 5 mL metric teaspoon is the standard reference. For cooking, the difference of 0.07 mL is negligible. This converter uses the US teaspoon (4.929 mL).

How do I convert teaspoons to fluid ounces?

Divide the number of teaspoons by 6 to get US fluid ounces. One US fluid ounce equals 6 US teaspoons. For example, 12 teaspoons equal 2 fluid ounces, and 3 teaspoons equal half a fluid ounce.