Enter a temperature and instantly see it in Celsius, Fahrenheit and Kelvin.
How to use the Temperature Converter
- Enter the temperature value.
- Choose its unit — °C, °F or K.
- All three scales update instantly as you type.
The conversion formulas
Celsius to Fahrenheit: multiply by 9/5 and add 32. Fahrenheit to Celsius: subtract 32 and multiply by 5/9. Kelvin is Celsius plus 273.15 — the same size degree, just a different zero point.
Examples: 37 °C = 98.6 °F (normal body temperature); 100 °F = 37.8 °C (a fever); −40 is the magic point where Celsius and Fahrenheit are equal.
Reference points worth memorising
| Reference | °C | °F |
|---|
| Water freezes | 0 | 32 |
| Room temperature | 21–25 | 70–77 |
| Human body | 37 | 98.6 |
| Fever threshold | 38+ | 100.4+ |
| Water boils | 100 | 212 |
India uses Celsius for weather and cooking, while US recipes and appliances often use Fahrenheit — this converter bridges the gap instantly.
Frequently asked questions
How do I convert Celsius to Fahrenheit?
Multiply the Celsius value by 9/5 and add 32. Example: 25 × 1.8 + 32 = 77 °F.
How do I convert Fahrenheit to Celsius?
Subtract 32 and multiply by 5/9. Example: (98.6 − 32) × 5/9 = 37 °C.
What is Kelvin used for?
Science and engineering. Kelvin starts at absolute zero (−273.15 °C), the theoretical point where molecular motion stops.
What is a fever in Fahrenheit?
100.4 °F (38 °C) and above is generally considered a fever; 103 °F (39.4 °C) is high — seek medical advice.
Is this temperature converter free?
Yes — free, instant, private.