Disclosure: This post contains affiliate links, which means we may earn a commission if you purchase through our links at no extra cost to you.
1.5 tablespoons (tbsp) is equal to 4.5 teaspoons (tsp).
To convert tablespoons to teaspoons, multiply the number of tablespoons by 3 because each tablespoon contains 3 teaspoons. Therefore, 1.5 tbsp × 3 = 4.5 tsp.
Table of Contents
Conversion Tool
Result in tsp:
Conversion Formula
The formula to convert tablespoons (tbsp) to teaspoons (tsp) is:
teaspoons = tablespoons × 3
This works because one tablespoon equals exactly three teaspoons. So, multiply any measurement in tablespoons by 3 to get the equivalent teaspoons.
For example:
- Given: 2 tbsp
- Calculation: 2 × 3 = 6 tsp
- Result: 2 tablespoons equals 6 teaspoons
Conversion Example
- Convert 4 tbsp to tsp:
- Multiply 4 by 3
- 4 × 3 = 12 tsp
- Answer: 4 tablespoons equals 12 teaspoons
- Convert 0.75 tbsp to tsp:
- Multiply 0.75 by 3
- 0.75 × 3 = 2.25 tsp
- Answer: 0.75 tablespoons equals 2.25 teaspoons
- Convert 10 tbsp to tsp:
- Multiply 10 by 3
- 10 × 3 = 30 tsp
- Answer: 10 tablespoons equals 30 teaspoons
- Convert 2.25 tbsp to tsp:
- Multiply 2.25 by 3
- 2.25 × 3 = 6.75 tsp
- Answer: 2.25 tablespoons equals 6.75 teaspoons
Conversion Chart
The table below shows conversion from tablespoons to teaspoons for values from -23.5 to 26.5. Each value is multiplied by 3 to get teaspoons. Negative values are included to represent measurements below zero.
| Tablespoons (tbsp) | Teaspoons (tsp) |
|---|---|
| -23.5 | -70.5 |
| -20 | -60 |
| -15 | -45 |
| -10 | -30 |
| -5 | -15 |
| 0 | 0 |
| 2 | 6 |
| 5 | 15 |
| 10 | 30 |
| 15 | 45 |
| 20 | 60 |
| 25 | 75 |
| 26.5 | 79.5 |
Related Conversion Questions
- How many teaspoons are in 1.5 tablespoons exactly?
- Is 1.5 tbsp more or less than 5 tsp?
- What is the easiest way to convert 1.5 tbsp into teaspoons?
- Can I substitute 1.5 tablespoons with teaspoons in cooking?
- How do you convert 1.5 tbsp to tsp without a calculator?
- Are 1.5 tbsp and 4.5 tsp equivalent in volume?
- How much is 1.5 tablespoons in teaspoons for baking?
Conversion Definitions
tbsp (tablespoon): A tablespoon is a unit of volume used in cooking and measuring ingredients. It equals exactly 15 milliliters in the US customary system. Tablespoons are bigger than teaspoons and often used for measuring larger amounts of liquid or dry ingredients when precise measurement is needed.
tsp (teaspoon): A teaspoon is a smaller unit of volume commonly used in cooking recipes. It equals 5 milliliters in the US system. Teaspoons are useful for measuring small amounts of ingredients, like spices or flavorings, offering an easy way to portion small quantities with consistency.
Conversion FAQs
Why does 1 tablespoon equal 3 teaspoons?
One tablespoon is standardized as three teaspoons because the teaspoon is one-third the size of a tablespoon in volume. This ratio was established to simplify cooking measurements and conversions, making it easier to scale recipes up or down without confusion.
Can I use 1.5 tablespoons directly in place of teaspoons?
You can convert 1.5 tablespoons to teaspoons by multiplying by 3, resulting 4.5 teaspoons. However, spoon sizes might vary in households, so using measuring spoons or tools is recommended for accuracy, especially in baking where precision matters.
What happens if I mix tablespoons and teaspoons in a recipe?
Mixing tablespoons and teaspoons without proper conversion can lead to incorrect ingredient amounts. Since tablespoons are larger, confusing the two may cause your recipe to have too much or too little of an ingredient, affecting texture and taste.
Is the tablespoon to teaspoon conversion the same internationally?
Mostly, yes; the US tablespoon equals 3 teaspoons. But some countries use different tablespoon sizes, such as Australia where 1 tablespoon is 20 ml instead of 15 ml. So, conversions can slightly differ depending on region, which should be considered in international recipes.
How do I convert tablespoons to teaspoons without a calculator?
Since 1 tablespoon equals 3 teaspoons, multiply the number of tablespoons by 3. For example, for 1.5 tablespoons, multiply 1.5 × 3 = 4.5 teaspoons. You can do this easily with mental math or by using simple multiplication.
