Teaspoon (UK) to Tablespoon (US) Converter

Volume Converter

40 units available

Decimals:

From

To

0.400317

1 tsp (UK) = 0.400317 tbsp

Formula:

tbsp = tsp (UK) × 0.4003166418

With your value: 1 tsp (UK) = 0.40031664 tbsp

How big is that?

Everyday references on a logarithmic scale, all expressed in teaspoon (uk) so you can sanity-check the result.

Soda can (1/18 your value)0.0557 tsp (UK)

Milk carton (1/5.9 your value)0.169 tsp (UK)

Your value1.00 tsp (UK)

Kitchen bucket (1.7× your value)1.69 tsp (UK)

Car fuel tank (8.4× your value)8.45 tsp (UK)

Bathtub (34× your value)33.8 tsp (UK)

Other Teaspoon (UK) to Tablespoon (US) conversions

2 tsp (UK) to tbsp 3 tsp (UK) to tbsp 4 tsp (UK) to tbsp 5 tsp (UK) to tbsp 6 tsp (UK) to tbsp 7 tsp (UK) to tbsp 8 tsp (UK) to tbsp

Teaspoon (UK) to Tablespoon (US) Conversion Table

Teaspoon (UK) (tsp (UK))	Tablespoon (US) (tbsp)
0.5	0.200158
1	0.400317
2	0.800633
5	2.001583
10	4.003166
15	6.00475
20	8.006333
25	10.007916
50	20.015832
100	40.031664
250	100.07916
500	200.158321
1000	400.316642

Tablespoon (US) to Teaspoon (UK) Conversion Table

Tablespoon (US) (tbsp)	Teaspoon (UK) (tsp (UK))
0.5	1.249011
1	2.498023
2	4.996045
5	12.490113
10	24.980226
15	37.470338
20	49.960451
25	62.450564
50	124.901128
100	249.802255
250	624.505638
500	1,249.011277
1000	2,498.022554

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Teaspoon (UK) (tsp (UK))

Volume

Exact conversion

Derived from the cubic metre. The litre is exactly 10⁻³ m³; US and imperial capacity units are exact multiples fixed by statute.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

Tablespoon (US) (tbsp)

Volume

Exact conversion

Derived from the cubic metre. The litre is exactly 10⁻³ m³; US and imperial capacity units are exact multiples fixed by statute.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert Teaspoon (UK) to Tablespoon (US)

To convert from Teaspoon (UK) (tsp (UK)) to Tablespoon (US) (tbsp), multiply the value by 0.4003166418.

Formula: tbsp = tsp (UK) × 0.4003166418

Reverse: tsp (UK) = tbsp × 2.4980225539

Step-by-Step Example

Start with your value in Teaspoon (UK). For example: 5 tsp (UK)
Multiply by the conversion factor: 5 x 0.4003166418
The result is: 2.001583 tbsp

About Teaspoon (UK)

The teaspoon (uk) (tsp (UK)) is a unit of volume and capacity. One teaspoon (uk) equals 0.005919388021 litres. UnitConvertLab converts it against every other volume unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: volume calculations, engineering and science, education.

About Tablespoon (US)

The US tablespoon equals approximately 14.79 mL or 3 teaspoons. It is a standard cooking measurement.

Common uses: cooking, baking, medicine.

Frequently Asked Questions

How many Tablespoon (US) are in 1 Teaspoon (UK)?

There are exactly 0.4003166418 Tablespoon (US) in 1 Teaspoon (UK). This means the conversion factor from Teaspoon (UK) to Tablespoon (US) is 0.4003166418.

What is the formula to convert Teaspoon (UK) to Tablespoon (US)?

The formula to convert Teaspoon (UK) to Tablespoon (US) is: tbsp = tsp (UK) × 0.4003166418. For example, to convert 10 Teaspoon (UK) to Tablespoon (US), you would multiply 10 by 0.4003166418.

What is a Teaspoon (UK)?