1.5 tablespoons (tbsp) is equal to 4.5 teaspoons (tsp).
To convert tablespoons to teaspoons, you multiply the number of tablespoons by 3 because 1 tablespoon equals 3 teaspoons. So for 1.5 tbsp, multiplying by 3 gives 4.5 tsp.
Conversion Tool
Result in tsp:
Conversion Formula
The conversion formula between tablespoons and teaspoons is based on their volume relationship. One tablespoon equals exactly three teaspoons. So the formula is:
teaspoons = tablespoons × 3
This works because teaspoons are smaller units; multiplying tablespoons by 3 translates the larger unit into the smaller one. For example, converting 1.5 tbsp:
- Start with 1.5 tablespoons
- Multiply 1.5 × 3
- Result is 4.5 teaspoons
Therefore, 1.5 tablespoons equals 4.5 teaspoons.
Conversion Example
- Convert 2 tbsp to tsp
- Take 2 tablespoons
- Multiply 2 × 3 = 6
- So, 2 tbsp equals 6 tsp
- Convert 0.75 tbsp to tsp
- Start with 0.75 tablespoons
- Multiply 0.75 × 3 = 2.25
- Result is 2.25 teaspoons
- Convert 4.2 tbsp to tsp
- Take 4.2 tablespoons
- Multiply 4.2 × 3 = 12.6
- Equals 12.6 teaspoons
- Convert 5 tbsp to tsp
- 5 tablespoons multiplied by 3
- 5 × 3 = 15 teaspoons
Conversion Chart
This chart shows tablespoon values from -23.5 to 26.5 converted into teaspoons. To use the chart, find the tablespoon value in the first column, then look at the corresponding teaspoons value in the second column. Negative values represent volume below zero, which could be relevant in scientific contexts or calculations involving differences.
| Tablespoons (tbsp) | Teaspoons (tsp) |
|---|---|
| -23.5 | -70.5 |
| -20 | -60 |
| -15 | -45 |
| -10 | -30 |
| -5 | -15 |
| -2.5 | -7.5 |
| 0 | 0 |
| 1 | 3 |
| 3.5 | 10.5 |
| 5 | 15 |
| 7.25 | 21.75 |
| 10 | 30 |
| 13 | 39 |
| 15.5 | 46.5 |
| 18 | 54 |
| 20 | 60 |
| 23 | 69 |
| 26.5 | 79.5 |
Related Conversion Questions
- How many teaspoons are in 1.5 tablespoons exactly?
- Is 1.5 tbsp equal to 4 tsp or 4.5 tsp?
- What is the quickest way to convert 1.5 tablespoons to teaspoons?
- Can I use 1.5 tablespoons as 4 teaspoons in recipes?
- Does 1.5 tbsp equal more or less than 4 teaspoons?
- How do I convert 1.5 tbsp to tsp without a calculator?
- Why is 1.5 tablespoons multiplied by 3 for tsp conversion?
Conversion Definitions
tbsp (tablespoon): A tablespoon is a unit of volume commonly used in cooking, equal to three teaspoons or approximately 14.8 milliliters. It measures both liquid and dry ingredients and is part of the US customary and imperial systems, making it practical for recipe measurements.
tsp (teaspoon): A teaspoon is a smaller unit of volume used in cooking and medicine, equal to one-third of a tablespoon or about 4.93 milliliters. It provides precise measurement for ingredients in small quantities, ensuring consistent flavor or dosage.
Conversion FAQs
Can you convert tablespoons to teaspoons by dividing?
No, you cannot divide tablespoons by teaspoons to convert. Since one tablespoon is larger, you multiply the tablespoons by 3 to get the number of teaspoons. Dividing would give incorrect smaller values.
Does the tablespoon to teaspoon conversion change with different substances?
The conversion stays the same regardless of substance because it measures volume, not weight. However, weight conversions depend on density, so volume conversions like tbsp to tsp remain consistent.
Are tablespoon and teaspoon measurements the same worldwide?
Tablespoons and teaspoons can differ slightly by country, especially between US and UK measurements. US tablespoon equals 14.8 ml, while UK tablespoon is 15 ml, but the tsp remains close, so minor differences may occur.
Is it accurate to use 1.5 tbsp as 4 tsp in recipes?
Using 4 tsp instead of 4.5 tsp for 1.5 tbsp reduces the quantity by 0.5 tsp, which might affect the recipe slightly, especially in baking. For accurate results, use the exact conversion of 4.5 tsp.
Why does the conversion formula multiply tablespoons by 3?
Because one tablespoon contains exactly three teaspoons, multiplying by 3 converts the larger unit into the smaller unit directly, preserving the volume equivalence.