US teaspoon to Imperial teaspoon

One US teaspoon equals approximately 4.929 mL, typically rounded to 5 mL in medicine and 4.93 mL in precise culinary conversions. The metric teaspoon used in Australia and Canada is exactly 5 mL.

A US teaspoon is about 4.93 mL; an imperial (UK) teaspoon is about 5.92 mL — approximately 20% larger. This difference can affect recipes crossing US and UK sources, particularly for spices and leavening agents.

In the US system, 3 teaspoons equal 1 tablespoon (3 × 4.929 mL = 14.787 mL). The metric equivalent is the same ratio: 3 × 5 mL = 15 mL tablespoon.

Not exactly. Medicine dosing uses a standardized 5 mL teaspoon, while the US cooking teaspoon is about 4.93 mL. For medication accuracy, always use a calibrated oral syringe rather than a kitchen teaspoon, which can vary from 3 to 7 mL.

There are 48 US teaspoons in one US cup: 1 cup = 16 tablespoons = 48 teaspoons.

One imperial teaspoon equals approximately 5.919 mL — slightly larger than the US teaspoon (4.929 mL) and the metric teaspoon (5 mL).

An imperial teaspoon is approximately 5.92 mL; a metric teaspoon is exactly 5 mL. The metric teaspoon is now standard in UK cooking, medicine, and pharmacology.

The imperial teaspoon is obsolete in modern UK, Australian, and Canadian cooking, which all use the 5 mL metric teaspoon. It may appear in cookbooks published before the 1970s metrication period.

A culinary pinch — the amount you can hold between thumb and forefinger — is roughly 0.3–0.5 mL, or about 1/16 of a teaspoon. Professional recipe developers have measured this and found surprising consistency across people: the human fingertip geometry constrains how much fine powder you can grip. A "dash" (liquid) is about 0.6 mL, and a "smidgen" is half a pinch (~0.15 mL). These folksy terms survive in recipes because they map to real, repeatable volumes — within the tolerance that salt and spice measurements actually require.

The WHO recommended the 5 mL metric teaspoon for medication dosing in the 1970s to eliminate ambiguity between imperial (5.92 mL), US (4.93 mL), and other teaspoon sizes. A calibrated 5 mL oral syringe is now the recommended tool for all liquid medicines.