Whether you need to convert Celsius to Fahrenheit for a recipe, Kelvin for a science calculation, or Fahrenheit to Celsius for a weather app, this free temperature converter gives you exact results using the standard thermodynamic formulas. All five major temperature scales are supported.
How to Use This Converter
- 01
Select the source scale
Choose the temperature scale you already have — Celsius, Fahrenheit, Kelvin, Rankine, or Réaumur — in the top dropdown.
- 02
Enter the temperature
Type the value in the input field. Negative numbers are fully supported.
- 03
Choose the target scale
Select the scale you want to convert to in the bottom dropdown. The result updates instantly.
- 04
Use quick chips for common values
Tap any chip for instant one-click conversions — body temperature, freezing point, boiling point, and more.
Temperature Scale Reference
| Scale | Symbol | Absolute zero |
|---|---|---|
| Celsius | °C | −273.15°C |
| Fahrenheit | °F | −459.67°F |
| Kelvin | K | 0 K |
| Rankine | °R | 0°R |
| Réaumur | °Ré | −218.52°Ré |
Frequently Asked Questions
Need more unit converters?
Try our Length Converter and Weight Converter — same clean, instant interface.