How do I convert a temperature?

Enter a temperature value in the input field and select the source unit (°C, °F, or K). The tool instantly shows the equivalent in all three units.

What are the conversion formulas?

Celsius to Fahrenheit: (°C × 9/5) + 32. Fahrenheit to Celsius: (°F − 32) × 5/9. Celsius to Kelvin: °C + 273.15. Kelvin to Celsius: K − 273.15. Results are rounded to 4 decimal places.

Is the temperature converter free?

Yes, completely free. All conversions run entirely in your browser — no data is sent to any server, and no signup is required.

Temperature Converter

Convert temperatures between Celsius, Fahrenheit, and Kelvin instantly online. Free temperature converter — enter a value, pick the unit, get all three at once. No signup required.

Temperature (Celsius)

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Temperature Conversion Formulas

Celsius → Fahrenheit: (°C × 9/5) + 32
Fahrenheit → Celsius: (°F − 32) × 5/9
Celsius → Kelvin: °C + 273.15
Kelvin → Celsius: K − 273.15

Common Reference Points

Water freezes at 0°C / 32°F / 273.15 K
Water boils at 100°C / 212°F / 373.15 K
Absolute zero is −273.15°C / −459.67°F / 0 K
Normal body temperature is ~37°C / 98.6°F / 310.15 K