How to use this converter

Enter temperature, from, to.
Select Calculate to view the result.
Check the method and assumptions below before using the result.

Input reference and sample values

Use the units and choices shown for each field. Sample values are provided for practice, not as recommendations.

Input	Format and units	Sample
Temperature	Numeric value.	`20`
From	Choose Celsius (°C) / Fahrenheit (°F) / Kelvin (K).	`Celsius (°C)`
To	Choose Celsius (°C) / Fahrenheit (°F) / Kelvin (K).	`Fahrenheit (°F)`

Result for these sample inputs

68 °F

Celsius equivalent: 20

Select Try the example in the form to load these values and calculate them again. This replaces the current form inputs. Compare the result with the method and worked explanation below.

The method, explained

Fahrenheit = Celsius × 9/5 + 32. Kelvin = Celsius + 273.15. Reverse these relationships to convert back.

A WORKED EXAMPLE

20°C equals 68°F and 293.15 K. At −40, Celsius and Fahrenheit have the same numerical value.

Understanding your result

Temperature scales have both a scale factor and an offset. Convert a measured temperature here; a temperature difference requires a different calculation.

What to keep in mind

This converts temperature readings, not temperature differences. Negative Kelvin inputs are rejected.

Common questions

Why can I not enter negative Kelvin?

Zero Kelvin is absolute zero. Ordinary thermodynamic temperature readings cannot be below it.

Does a 10°C increase equal an 18°F increase?

Yes. Differences use the scale factor only; do not add 32 when converting a change in temperature.

Methodology maintained by ClarityKit. How these tools are built and checked.

Temperature Converter

Choose units and a value