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Temperature converter
Convert an absolute temperature between Celsius, Fahrenheit, and kelvin.
02 / Your result
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Start with your own input or try an example.
What it does
Enter a temperature in Celsius, Fahrenheit, or kelvin and see all three scales together. Use it to compare weather reports, interpret a temperature specification, or check a classroom calculation. Inputs below absolute zero are rejected, and each output includes its unit so the copied result stays clear when shared in notes.
Useful when
- Read a weather temperature reported in another scale.
- Check a temperature conversion in a science exercise.
- Translate a device specification between Celsius and Fahrenheit.
How to use it
- Enter the temperature and select its current scale.
- Convert to see Celsius, Fahrenheit, and kelvin together.
- Copy the labeled values or download a text result.
A few useful details
How do I convert Celsius to Fahrenheit?
Multiply the Celsius temperature by 1.8 and add 32. For example, 20 °C is 68 °F. The reverse conversion subtracts 32 and divides by 1.8.
Why are some negative temperatures rejected?
This tool accepts absolute temperatures at or above 0 K, equivalent to −273.15 °C or −459.67 °F. It rejects lower values and supports inputs up to 1 billion in the chosen scale.
Can I use it for a temperature difference?
It converts an absolute reading, not an interval. A change of 10 °C equals a change of 18 °F and 10 K; adding the absolute-temperature offset to a difference would give the wrong answer.