How do I convert tablespoons to teaspoons?

To convert tablespoons to teaspoons, use our converter above. Enter your value and get instant, accurate results. Our tool handles both metric and imperial volume units.

What is the difference between metric and imperial volume units?

Metric volume uses liters and milliliters, based on powers of 10. Imperial uses gallons, quarts, pints, and cups. US and UK gallons differ in size, with UK gallons being about 20% larger.

How accurate are these volume conversions?

Our conversions are accurate to at least 6 decimal places using precise mathematical formulas. This exceeds the accuracy needed for most cooking, scientific, and industrial applications.

Tablespoon to Teaspoon Converter

Convert Tablespoons to Teaspoons instantly

From

tbsp

Result

0tsp

Teaspoon

Conversion Formula

Teaspoon = Tablespoon × 3.000008

Where:

tbsp = Tablespoon
tsp = Teaspoon

What is a Tablespoon?

The tablespoon (tbsp) is a unit of volume in the imperial system of measurement.

What is a Teaspoon?

The teaspoon (tsp) is a unit of volume in the imperial system of measurement.

How to Convert Tablespoon to Teaspoon

Convert tablespoons to teaspoons instantly

Quick Reference:

1 tbsp = 3.000008 tsp
1 tsp = 0.333332 tbsp

Common Tablespoon to Teaspoon Conversions

1 tbsp
= 3.00 tsp

5 tbsp
= 15.00 tsp

10 tbsp
= 30.00 tsp

25 tbsp
= 75.00 tsp

50 tbsp
= 150.00 tsp

100 tbsp
= 300.00 tsp

Conversion Reference Table

Tablespoon (tbsp)	Teaspoon (tsp)
1	3
2	6
3	9
4	12
5	15
10	30.0001
15	45.0001
20	60.0002
25	75.0002
50	150.0004
75	225.0006
100	300.0008
250	750.002
500	1,500.0041
1,000	3,000.0081

Quick reference table showing common tablespoons to teaspoons conversions.

Real-World Volume Conversions

👨‍🍳

Cooking and Baking

Converting between cups, tablespoons, and milliliters when following international recipes. A US cup is 237ml, while metric recipes often use 250ml.

⛽

Fuel and Gas

Converting fuel efficiency (miles per gallon vs liters per 100km) and fuel tank capacity. US vehicles measure in gallons, while most countries use liters.

🥤

Beverages and Drinks

Soft drinks come in various sizes: 355ml cans (12 fl oz), 500ml bottles, 2-liter bottles, or gallon jugs. Understanding these conversions helps compare values.

🏊

Swimming Pools and Spas

Pool volume calculations for chemical treatments and water capacity. Pools are measured in gallons (US) or cubic meters/liters (elsewhere).

💊

Medical Dosing

Medication doses use milliliters (ml) or cubic centimeters (cc). Precise conversions are critical for safe medication administration.

🐠

Aquariums and Fish Tanks

Tank capacity affects filtration, water changes, and fish stocking. Aquariums are sold in gallons (US) or liters depending on region.

Volume Conversion FAQs

Common Conversion Mistakes

⚠Confusing the direction of conversion — always check whether you are converting from Tablespoon to Teaspoon or vice versa.
⚠Rounding too early in multi-step calculations. Keep full precision until the final result.
⚠Using outdated or approximate conversion factors. Our converter uses values traceable to international measurement standards.

Sources & Standards

Conversion factors on this page are based on definitions from the International Bureau of Weights and Measures (BIPM) and the National Institute of Standards and Technology (NIST). All factors are accurate to at least 6 decimal places.

Last updated: November 27, 2025