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US tablespoons to US teaspoons (tbsp to tsp)

To convert US tablespoons to US teaspoons (tbsp to tsp): one US tablespoon is 3 US teaspoons, so 4 tbsp is 12 tsp.

Notice: Not for measuring or calculating medication. Incorrect dosing can cause serious injury. Use the dosing device supplied with the medication and follow the label or the directions of a pharmacist or physician.

In US teaspoons12 tsp

Conversion factor Exact by definition: the ratio belongs to the customary units themselves and does not change.
1 US tablespoon = 3 US teaspoons
The other way
1 US teaspoon = 0.3333333333 US tablespoons
Working
4 x 3 = 12
4 tbsp in every unit
59.147 ml 0.059147 L 12 tsp 4 tbsp 2 fl oz 0.25 cup 0.125 pt 0.0625 qt 0.015625 gal 0.013011 imp gal 0.0020888 cu ft 0.000077361 cu yd 0.000059147 m3
US tablespoons to US teaspoons
tbsptsp
13
26
515
1030
2575
50150
100300

How the Unit Converter works

One US tablespoon is exactly 3 US teaspoons. That ratio belongs to the customary system itself and is much older than any link to metric: the 1959 international yard and pound agreement later fixed the yard and the pound against the meter and the kilogram, but it left the ratios between customary units (feet to the yard, ounces to the pound, cups to the gallon) exactly as they were.

Worked through: 3 tbsp x 3 = 9 tsp.

Going the other way, one US teaspoon is 0.3333333333 US tablespoons.

To convert without a calculator, multiply by 3. Rounding that to 3 is within 0% for most purposes.

Three teaspoons to a tablespoon in the US. Australia is the exception: the Australian tablespoon is 20 ml and holds four teaspoons, which quietly breaks any recipe crossing that border.

Precision is worth matching to the input. A measurement given as 0.5 tbsp carries one or two significant figures, and reporting its conversion to six implies a precision the original never had.

Unit Converter FAQ

How many US teaspoons are in a US tablespoon?

3. That is exact by definition: the ratio is part of the customary system itself and does not change.

What is 4 tbsp in US teaspoons?

12 tsp. Multiply by 3: 3 tbsp x 3 = 9 tsp.

How do I convert US teaspoons back to US tablespoons?

Divide by 3, or equivalently multiply by 0.33333333. One US teaspoon is 0.33333333 US tablespoons. The two factors are reciprocals, so you only need to remember one of them.

Is there anything to watch out for with this conversion?

Three teaspoons to a tablespoon in the US. Australia is the exception: the Australian tablespoon is 20 ml and holds four teaspoons, which quietly breaks any recipe crossing that border.

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