Teaspoon (UK) to Cup (US) Converter

Volume Converter

40 units available

Decimals:

From

To

0.02502

1 tsp (UK) = 0.02502 cup

Formula:

cup = tsp (UK) × 0.0250197901

With your value: 1 tsp (UK) = 0.02501979 cup

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 Cup (US) conversions

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

Teaspoon (UK) to Cup (US) Conversion Table

Teaspoon (UK) (tsp (UK))	Cup (US) (cup)
0.5	0.01251
1	0.02502
2	0.05004
5	0.125099
10	0.250198
15	0.375297
20	0.500396
25	0.625495
50	1.25099
100	2.501979
250	6.254948
500	12.509895
1000	25.01979

Cup (US) to Teaspoon (UK) Conversion Table

Cup (US) (cup)	Teaspoon (UK) (tsp (UK))
0.5	19.98418
1	39.968361
2	79.936722
5	199.841804
10	399.683609
15	599.525413
20	799.367217
25	999.209022
50	1,998.418043
100	3,996.836086
250	9,992.090216
500	19,984.180431
1000	39,968.360862

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

Cup (US) (cup)

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 Cup (US)

To convert from Teaspoon (UK) (tsp (UK)) to Cup (US) (cup), multiply the value by 0.0250197901.

Formula: cup = tsp (UK) × 0.0250197901

Reverse: tsp (UK) = cup × 39.9683608622

Step-by-Step Example

Start with your value in Teaspoon (UK). For example: 5 tsp (UK)
Multiply by the conversion factor: 5 x 0.0250197901
The result is: 0.125099 cup

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 Cup (US)

The US cup equals approximately 236.6 mL and is a standard cooking measurement in the United States.

Common uses: baking, cooking, recipes.

Frequently Asked Questions

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

There are exactly 0.0250197901 Cup (US) in 1 Teaspoon (UK). This means the conversion factor from Teaspoon (UK) to Cup (US) is 0.0250197901.

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

The formula to convert Teaspoon (UK) to Cup (US) is: cup = tsp (UK) × 0.0250197901. For example, to convert 10 Teaspoon (UK) to Cup (US), you would multiply 10 by 0.0250197901.

What is a Teaspoon (UK)?