Convert Tablespoon (US) to Teaspoon (US)

Please provide values below to convert tablespoon (US) to teaspoon (US), or vice versa.

From:		tablespoon (US)
To:		teaspoon (US)

Tablespoon

Definition: A tablespoon (symbol: Tbsp) is a unit of volume based on an item of cutlery. The United States customary tablespoon is equal to approximately 14.8 mL, a metric tablespoon is exactly equal to 15 mL, and an Australian tablespoon is equal to 20 mL. In nutrition labeling in both the US and the UK, a tablespoon is defined as 15 mL.

History/origin: The use of the tablespoon as a measurement of volume began in the 18^th century when it became the unofficial unit of the Apothecaries' system of measures. It was equal to 4 drams, or ½ of a fluid ounce. These relationships still hold in the US customary system of measurement.

Current use: The table spoon as a unit of volume is used in cooking in certain countries such as the United States, the United Kingdom, and Australia.

Teaspoon

Definition: A teaspoon (symbol: tsp) is a unit of volume based on an item of cutlery. The United States customary teaspoon is equal to exactly 4.928922 mL. The metric teaspoon is equal to 5 mL.

History/origin: The teaspoon was originally used as a unit of Apothecaries' measure and was equal to 1 fluid dram, ¼ of a tablespoon, or 1/8 of a fluid ounce. This definition of the teaspoon is smaller than the definitions of the teaspoon used today. This is partially due to tea being expensive in 1660s England, resulting in smaller teacups and teaspoons. Once England began importing tea from China in 1710, reducing the cost of tea, the size of teacups and teaspoons increased, and by the 1730s, became 1/3, rather than 1/4 the size of a tablespoon. This is the same size ratio in use today in both the US customary and metric teaspoons (though the actual volumes differ).

Current use: The teaspoon is widely used in cooking within certain countries, as well as for measuring pharmaceutic prescriptions. Outside of these applications, the unit is not particularly used, with measurements such as the liter or cubic meter being preferred.

Tablespoon (US) to Teaspoon (US) Conversion Table

How to Convert Tablespoon (US) to Teaspoon (US)

1 tablespoon (US) = 3 teaspoon (US)
1 teaspoon (US) = 0.3333333333 tablespoon (US)

Example: convert 15 tablespoon (US) to teaspoon (US):
15 tablespoon (US) = 15 × 3 teaspoon (US) = 45 teaspoon (US)

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