Teaspoon (UK) to Teaspoon (US) Converter

Volume Converter

40 units available

Decimals:

From

To

1.20095

1 tsp (UK) = 1.20095 tsp

Formula:

tsp = tsp (UK) × 1.2009499255

With your value: 1 tsp (UK) = 1.20094993 tsp

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 Teaspoon (US) conversions

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

Teaspoon (UK) to Teaspoon (US) Conversion Table

Teaspoon (UK) (tsp (UK))	Teaspoon (US) (tsp)
0.5	0.600475
1	1.20095
2	2.4019
5	6.00475
10	12.009499
15	18.014249
20	24.018999
25	30.023748
50	60.047496
100	120.094993
250	300.237481
500	600.474963
1000	1,200.949926

Teaspoon (US) to Teaspoon (UK) Conversion Table

Teaspoon (US) (tsp)	Teaspoon (UK) (tsp (UK))
0.5	0.416337
1	0.832674
2	1.665348
5	4.163371
10	8.326742
15	12.490113
20	16.653484
25	20.816855
50	41.633709
100	83.267418
250	208.168546
500	416.337092
1000	832.674185

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

Teaspoon (US) (tsp)

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 Teaspoon (US)

To convert from Teaspoon (UK) (tsp (UK)) to Teaspoon (US) (tsp), multiply the value by 1.2009499255.

Formula: tsp = tsp (UK) × 1.2009499255

Reverse: tsp (UK) = tsp × 0.8326741846

Step-by-Step Example

Start with your value in Teaspoon (UK). For example: 5 tsp (UK)
Multiply by the conversion factor: 5 x 1.2009499255
The result is: 6.00475 tsp

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 Teaspoon (US)

The US teaspoon equals approximately 4.93 mL. It is one of the most common cooking measurements.

Common uses: cooking, medicine dosage, baking.

Frequently Asked Questions

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

There are exactly 1.2009499255 Teaspoon (US) in 1 Teaspoon (UK). This means the conversion factor from Teaspoon (UK) to Teaspoon (US) is 1.2009499255.

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

The formula to convert Teaspoon (UK) to Teaspoon (US) is: tsp = tsp (UK) × 1.2009499255. For example, to convert 10 Teaspoon (UK) to Teaspoon (US), you would multiply 10 by 1.2009499255.

What is a Teaspoon (UK)?