Why use this calculator
Temperature conversion is needed in cooking, science, weather, engineering, and international communication. Different countries and fields use different scales.
How to use it
Enter the temperature value and select the scale you're converting from. All three scales are shown simultaneously.
The formula
°C = (°F - 32) × 5/9. °F = °C × 9/5 + 32. K = °C + 273.15.
Worked examples
72°F to Celsius
22.22°C
100°C to Fahrenheit
212°F (boiling point of water)
When people use it
- Cooking temperature conversion
- Weather understanding across countries
- Scientific calculations
- HVAC and engineering
Tips
- Key reference points: Water freezes at 32°F/0°C, boils at 212°F/100°C
- Room temperature is about 68-72°F or 20-22°C
- Kelvin is used in science — 0K is absolute zero
Questions people ask
- When should I use Kelvin?
- Kelvin is used in scientific contexts, particularly physics and chemistry. It starts at absolute zero (-273.15°C), making it useful for calculations where negative temperatures would be problematic.