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Volume
Tablespoons to Teaspoons
Convert tablespoons (tbsp) to teaspoons (tsp). Type a value below to see the result update instantly. Reference table and formula included.
Calculator
1 tbsp = 3 tsp
Tablespoons to Teaspoons Conversion Table
Common values, ready to copy:
| tablespoons | teaspoons |
|---|---|
| 1 tbsp | 3 tsp |
| 2 tbsp | 6 tsp |
| 5 tbsp | 15 tsp |
| 10 tbsp | 30.0001 tsp |
| 25 tbsp | 75.0002 tsp |
| 50 tbsp | 150 tsp |
| 100 tbsp | 300 tsp |
| 1,000 tbsp | 3000.01 tsp |
Formula
teaspoons = tablespoons × 3.00000812e+0
Volume conversions use US customary measure (the cup, fluid ounce, and gallon are US definitions, not imperial). 1 US cup = 236.588 mL, 1 US gallon = 3.785411784 L.
About Tablespoons and Teaspoons
Tablespoons (tbsp): Three teaspoons, or about 15 mL; the US legal tablespoon is exactly 14.7868 mL, although international cooking convention is 15 mL. Common uses: Mid-range cooking measurements (oil, vinegar, honey, peanut butter), baking (small quantities of cocoa powder, cornstarch, baking soda).
Teaspoons (tsp): Standardized at about 5 mL for cooking purposes; US legal definition is exactly 4.92892 mL, but international cooking convention uses 5 mL even in the US. Common uses: Small cooking measurements (spices, baking powder, vanilla extract), liquid medication dosing for adults (often 1 or 2 teaspoons = 5 or 10 mL).
How the conversion works
Volume conversions use US customary measure (the cup, fluid ounce, and gallon are US definitions, not imperial). 1 US cup = 236.588 mL, 1 US gallon = 3.785411784 L.
The exact relationship is teaspoons = tablespoons × 3.00000812e+0, which the calculator at the top of this page applies in both directions. Type into either field and the other updates immediately.
When this conversion matters
Converting between tablespoons and teaspoons comes up wherever volume measurements move between systems — from one country's conventions to another's, from a scientific reference to a practical specification, or from one industry's working unit to another's. The calculator and reference table above cover the everyday range; for unusual values you can type any number into either field.