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15 Tablespoons to Teaspoons

15 tablespoons equals 45 teaspoons. Use the formula, worked example, and conversion table below to check the math.

15 tbsp = 45 tsp
tbsp × 3 = tsp
Try: 10 tbsp to tsp 14 tbsp to tsp 16 tbsp to tsp 20 tbsp to tsp
15 tbsp is also
15 tbsp = 0.2218 L 15 tbsp = 0.0586 gal 15 tbsp = 221.8 mL 15 tbsp = 0.9375 cup 15 tbsp = 7.5 fl oz 15 tbsp = 0.4688 pt 15 tbsp = 0.2344 qt
tbsp
45 tsp

Formula and Step-by-Step

tbsp × 3 = tsp
  1. Start with 15 tbsp
  2. Multiply by 3: 15 × 3 = 45
  3. Result: 15 tbsp = 45 tsp

Since 1 tablespoon equals 3 teaspoons, multiply any tablespoon value by 3 to convert.

Other Tablespoon to Teaspoon Values

Tablespoons (tbsp) Teaspoons (tsp)
1 tbsp 3 tsp
2 tbsp 6 tsp
5 tbsp 15 tsp
10 tbsp 30 tsp
15 tbsp 45 tsp
20 tbsp 60 tsp
25 tbsp 75 tsp
50 tbsp 150 tsp
75 tbsp 225 tsp
100 tbsp 300 tsp
250 tbsp 750 tsp
500 tbsp 1,500 tsp
1,000 tbsp 3,000 tsp
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Frequently Asked Questions

15 tablespoons equals 45 teaspoons.
The formula is: tbsp × 3 = tsp. See the tbsp to tsp formula page for worked examples.
Use the teaspoons to tablespoons converter. The reverse formula is: tsp ÷ 3 = tbsp.
The calculator uses the full-precision conversion factor for accuracy. Table values and displayed results are rounded for readability.
The conversion formula (tbsp × 3 = tsp) is based on internationally defined standards. Displayed results are rounded for readability, while the calculator uses the full-precision factor.
person Written by Sean Day verified Reviewed by UnitCompare update Last updated Mar 28, 2026