1 tablespoon equals 3 teaspoons. To convert tablespoons to teaspoons, multiply the tablespoon value by 3. For quick reference: 1 tbsp = 3 tsp, 5 tbsp = 15 tsp, 10 tbsp = 30 tsp, 100 tbsp = 300 tsp.
FormulaTeaspoons = Tablespoons × 3
Quick
How to convert tablespoons to teaspoons
1
Take your value
Start with your value in tablespoons.
2
Multiply by 3
Multiply the tablespoon value by 3. This is the exact conversion factor from tablespoons to teaspoons.
3
Read the result
The product is your value in teaspoons. For example, 5 tbsp × 3 = 15 tsp.
Conversion formula
The exact factor from tablespoons to teaspoons is 3.
Teaspoons = Tablespoons × 3
Tablespoons to Teaspoons conversion table
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
Conversion table from tablespoons to teaspoons
Tablespoons (tbsp)
Teaspoons (tsp)
0.1 tbsp
0.3 tsp
0.25 tbsp
0.75 tsp
0.5 tbsp
1.5 tsp
1 tbsp
3 tsp
1.5 tbsp
4.5 tsp
2 tbsp
6 tsp
2.5 tbsp
7.5 tsp
3 tbsp
9 tsp
4 tbsp
12 tsp
5 tbsp
15 tsp
6 tbsp
18 tsp
7 tbsp
21 tsp
8 tbsp
24 tsp
9 tbsp
27 tsp
10 tbsp
30 tsp
12 tbsp
36 tsp
15 tbsp
45 tsp
20 tbsp
60 tsp
25 tbsp
75 tsp
30 tbsp
90 tsp
40 tbsp
120 tsp
50 tbsp
150 tsp
60 tbsp
180 tsp
75 tbsp
225 tsp
100 tbsp
300 tsp
125 tbsp
375 tsp
150 tbsp
450 tsp
200 tbsp
600 tsp
250 tbsp
750 tsp
300 tbsp
900 tsp
400 tbsp
1200 tsp
500 tbsp
1500 tsp
600 tbsp
1800 tsp
750 tbsp
2250 tsp
1000 tbsp
3000 tsp
1500 tbsp
4500 tsp
2000 tbsp
6000 tsp
2500 tbsp
7500 tsp
3000 tbsp
9000 tsp
4000 tbsp
12000 tsp
5000 tbsp
15000 tsp
7500 tbsp
22500 tsp
10000 tbsp
30000 tsp
15000 tbsp
45000 tsp
20000 tbsp
60000 tsp
25000 tbsp
75000 tsp
30000 tbsp
90000 tsp
40000 tbsp
120000 tsp
50000 tbsp
150000 tsp
100000 tbsp
300000 tsp
Real-world reference
A US tablespoon of olive oil is about 14 mL. Nutrition labels typically use 1 tbsp = 15 mL. In teaspoons, that gives you: 1 tbsp = 3 tsp, 10 tbsp = 30 tsp, 100 tbsp = 300 tsp.
Frequently asked questions
How many teaspoons are in 1 tablespoon?
1 tablespoon equals 3 teaspoons.
How do I convert tablespoons to teaspoons?
Multiply the tablespoon value by 3. So x tbsp × 3 = the equivalent in tsp.
What is 5 tablespoons in teaspoons?
5 tablespoons equals 15 teaspoons.
What is 10 tablespoons in teaspoons?
10 tablespoons equals 30 teaspoons.
What is 100 tablespoons in teaspoons?
100 tablespoons equals 300 teaspoons.
How do I convert back from teaspoons to tablespoons?
Multiply the teaspoon value by 0.333333. For example, 1 tsp = 0.333333 tbsp.
Is the tablespoon bigger than the teaspoon?
Yes. 1 tablespoon is larger than 1 teaspoon — specifically 3 times larger.
Are these conversion factors exact?
Yes. The factor of 3 is derived directly from the SI definitions of tablespoon and teaspoon.
About the tablespoon and the teaspoon
The tablespoon
The US tablespoon equals 1/2 US fluid ounce, or 14.7868 mL — exactly 3 US teaspoons. The UK tablespoon is 17.7582 mL (5/8 imperial fl oz), the Australian metric tablespoon is 20 mL, and most other metric countries use 15 mL. Always check the source's convention before scaling a recipe.
The teaspoon
The US teaspoon equals 1/3 of a US tablespoon, or about 4.929 mL. The metric teaspoon (used on most non-US nutrition labels) is exactly 5 mL — close enough that you can substitute freely in cooking but not in precise dosing.