1 Teaspoon (UK) to Teaspoon (US)
Quick answer
1 Teaspoon (UK) (tsp (UK)) equals
1.20095 tsp
To convert 1 Teaspoon (UK)s to Teaspoon (US)s, multiply by 1.2009499255. Therefore, 1 Teaspoon (UK) (tsp (UK)) equals 1.20095 Teaspoon (US) (tsp).
Formula: tsp = tsp (UK) × 1.2009499255. Calculation: 1 × 1.2009499255 = 1.20095 tsp.
Convert Teaspoon (UK) (tsp (UK)) to Teaspoon (US) (tsp) online with our free unit converter. In volume, 1 tsp (UK) = 1.20095 tsp. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.
Worked example: converting Teaspoon (UK) to Teaspoon (US)
- Step 1 — start with the formula. tsp = tsp (UK) × 1.2009499255
- Step 2 — substitute your figure. 1 tsp (UK) × 1.2009499255
- Step 3 — read the result. 1 tsp (UK) = 1.20095 tsp
- Step 4 — check it in reverse. tsp (UK) = tsp × 0.8326741846 returns 1 tsp (UK), which matches the figure you started with.
Volume Converter
40 units available
1 tsp (UK) = 1.20095 tsp
Formula:
tsp = tsp (UK) × 1.2009499255With 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.
Other Teaspoon (UK) to Teaspoon (US) conversions
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
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
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
Teaspoon (UK) and Teaspoon (US) Relationship
Both Teaspoon (UK) and Teaspoon (US) belong to the US Customary / Imperial system, making this an intra-system conversion within volume. Since 1 Teaspoon (UK) equals approximately 1.2009 Teaspoon (US)s, the Teaspoon (UK) represents a larger unit interval than the Teaspoon (US). Understanding the relationship between Teaspoon (UK) and Teaspoon (US) is essential for accurate calculations in physics, engineering, commerce, and daily applications.
About Teaspoon (UK)
The Teaspoon (UK) (symbol: tsp (UK)) is a recognized unit in the US Customary / Imperial measurement framework, utilized within volume applications for precision and standardized data representation.
Common uses of Teaspoon (UK): 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 of Teaspoon (US): cooking, medicine dosage, baking.
Frequently Asked Questions
- What is 1 Teaspoon (UK) in Teaspoon (US)?
- 1 Teaspoon (UK) equals 1.20095 Teaspoon (US).
- How many Teaspoon (US)s are in 1 Teaspoon (UK)?
- There are exactly 1.2009499255 Teaspoon (US)s 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)s to Teaspoon (US)s, you would multiply 10 by 1.2009499255.
- What is a Teaspoon (UK)?
- The Teaspoon (UK) (symbol: tsp (UK)) is a recognized unit in the US Customary / Imperial measurement framework, utilized within volume applications for precision and standardized data representation.
- What is a Teaspoon (US)?
- The US teaspoon equals approximately 4.93 mL. It is one of the most common cooking measurements.
- What are the common uses of Teaspoon (UK)?
- The Teaspoon (UK) is commonly used in volume calculations, engineering and science, education.
Related Volume Conversions
Cite this page
UnitConvertLab. (2026). 1 Teaspoon (UK) to Teaspoon (US). UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/1-teaspoon_uk-to-teaspoon_us