1.5 TBSP to TSP – Answer with Formula

1.5 tablespoons (tbsp) is equal to 4.5 teaspoons (tsp).

To convert tablespoons to teaspoons, multiply the number of tablespoons by 3 because there are 3 teaspoons in each tablespoon. So, 1.5 tbsp × 3 = 4.5 tsp.

Conversion Tool

Conversion Formula

The formula to convert tablespoons (tbsp) to teaspoons (tsp) is based on the equivalence of units. Since 1 tablespoon equals 3 teaspoons, you multiply the tbsp value by 3 to get tsp.

Formula:
tsp = tbsp × 3

Why it works: Because teaspoon is a smaller unit than tablespoon, and exactly 3 teaspoons fill 1 tablespoon, so multiplying by 3 scales up the tbsp value into tsp.

Example: Convert 1.5 tbsp to tsp

• Start with 1.5 tbsp
• Multiply by 3: 1.5 × 3 = 4.5
• Result: 4.5 tsp

Conversion Example

• Convert 2.75 tbsp to tsp:
  • Multiply 2.75 by 3
  • 2.75 × 3 = 8.25 tsp
  • Therefore, 2.75 tbsp equals 8.25 tsp
• Convert 0.5 tbsp to tsp:
  • Multiply 0.5 by 3
  • 0.5 × 3 = 1.5 tsp
  • Thus, 0.5 tbsp equals 1.5 tsp
• Convert 4 tbsp to tsp:
  • Multiply 4 by 3
  • 4 × 3 = 12 tsp
  • So, 4 tbsp equals 12 tsp
• Convert 1 tbsp to tsp:
  • 1 × 3 = 3 tsp
  • Therefore, 1 tbsp is 3 tsp

Conversion Chart

The table below shows a range of tablespoon values from -23.5 to 26.5 and their equivalent in teaspoons. To use, find the tablespoon value in the left column and read across to find its tsp equivalent by multiplying by 3.

Related Conversion Questions

• How many teaspoons is 1.5 tbsp in baking recipes?
• What is the easiest way to convert 1.5 tablespoons to teaspoons?
• Is 1.5 tbsp equal to 4 or 5 teaspoons?
• How do you calculate teaspoons from 1.5 tablespoons without a calculator?
• Can I substitute 1.5 tbsp with teaspoons when cooking?
• How many tsp do I need if recipe calls for 1.5 tbsp?
• What is the conversion factor for 1.5 tbsp to tsp?

Conversion Definitions

tbsp (tablespoon): A tablespoon is a unit of volume used in cooking and food preparation, equal to three teaspoons. It is often used for measuring both liquid and dry ingredients. In the US, one tablespoon equals approximately 14.79 milliliters.

tsp (teaspoon): A teaspoon is a smaller volume measure used mainly in cooking and medicine. One teaspoon equals 1/3 of a tablespoon or about 4.93 milliliters in the US standard system. It’s common for measuring smaller amounts of ingredients or liquids.

Conversion FAQs

Can tablespoons and teaspoons be used interchangeably in recipes?

Not really, because a tablespoon is three times the volume of a teaspoon. Using teaspoons instead of tablespoons without adjusting the quantity can change the taste or texture of a recipe. Always convert properly to keep the recipe balanced.

Why do some countries have different tablespoon sizes?

Tablespoon sizes vary by region; for example, the US tablespoon is about 14.79 ml, but an Australian tablespoon is 20 ml. This variation affects conversions, so it’s useful to know which standard you’re using when converting tbsp to tsp.

Is it accurate to convert tablespoons to teaspoons by multiplying by 3 every time?

Yes, because by definition, 1 tablespoon equals exactly 3 teaspoons in volume, so multiplying by 3 is always correct for conversion regardless of quantity.

How to measure 1.5 tablespoons if I only have a teaspoon measure?

Since 1 tablespoon equals 3 teaspoons, 1.5 tablespoons equals 4.5 teaspoons. You can measure out 4 teaspoons plus half a teaspoon to get 1.5 tbsp precisely.

Why is the conversion from tbsp to tsp important in cooking?

Accurate conversions ensure the right balance of ingredients, which affects flavor, texture, and chemical reactions in cooking or baking. Measuring errors caused by ignoring conversion can lead to unsatisfactory results.