tablespoons to teaspoons | Exact Decimal + Formula
1 US Tablespoon = 3 US Teaspoon
Tablespoons to teaspoons is a constant kitchen conversion — one tablespoon equals three teaspoons.
About US Tablespoon and US Teaspoon
US Tablespoon (tbsp)
A US tablespoon is 1/16 of a cup, about 14.79 milliliters.
Where it's used: Recipes, spice measures, and sauce portions.
US Teaspoon (tsp)
A US teaspoon is 1/48 of a cup, about 4.93 milliliters.
Where it's used: Small ingredient amounts and seasoning in recipes.
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Cooking (Volume) Converter
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Formula
tsp = tbsp × 3
To convert US Tablespoon to US Teaspoon, use the formula displayed above.
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US Tablespoon to US Teaspoon: Quick Reference Table
| US Tablespoon | US Teaspoon (Decimal) | Fraction |
|---|---|---|
| 0.001 tbsp | 0.003 tsp | - |
| 0.01 tbsp | 0.03 tsp | - |
| 0.1 tbsp | 0.3 tsp | - |
| 0.5 tbsp | 1.5 tsp | - |
| 1 tbsp | 3 tsp | - |
| 2 tbsp | 6 tsp | - |
| 5 tbsp | 15 tsp | - |
| 10 tbsp | 30 tsp | - |
| 25 tbsp | 75 tsp | - |
| 50 tbsp | 150 tsp | - |
| 100 tbsp | 300 tsp | - |
| 250 tbsp | 750 tsp | - |
| 500 tbsp | 1500 tsp | - |
| 1000 tbsp | 3000 tsp | - |
tbsp to tsp Formula and Examples
Direct Formula
tsp = tbsp × 3 Inverse Formula
tbsp = tsp × 0.333333 Mental Math Shortcut
Multiply the value by roughly 3 to calculate the equivalent amount in your head.
Common US Tablespoon to US Teaspoon Calculations
- 5 tbsp = 15 tsp
- 10 tbsp = 30 tsp
- 50 tbsp = 150 tsp
- 100 tbsp = 300 tsp
- 500 tbsp = 1500 tsp
Precision & Practical Use
For example, 10 tbsp = 30 tsp — roughly multiple unit increments.
Results are computed to up to 9 decimal places. Round to the precision of your measuring instrument — for most cooking (volume) applications, 2–3 significant figures are plenty.
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How to Convert US Tablespoon to US Teaspoon
How many us teaspoons are in one us tablespoon?
One US Tablespoon (tbsp) equals 3 US Teaspoon (tsp). To convert us tablespoons to us teaspoons, multiply the us tablespoon value by 3.
How do I convert US Tablespoon to US Teaspoon?
Multiply your us tablespoon value by 3 to get the result in US Teaspoon: tsp = tbsp × 3. For example, 5 tbsp = 15 tsp.
What is the formula for converting tbsp to tsp?
The conversion formula is tsp = tbsp × 3. Use the calculator above for any value, and see the reference table below for common inputs from 0.001 to 1000.
Is there a quick mental estimate for tbsp to tsp?
Multiply the value by roughly 3 to calculate the equivalent amount in your head.
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