Celsius to Fahrenheit Converter (°C to °F)
Convert degrees Celsius (°C) to Fahrenheit (°F) and Kelvin (K) in real time with quick presets for weather, fever check, and oven cooking.
Common Temperature Reference Table
| Description | Celsius (°C) | Fahrenheit (°F) | Kelvin (K) |
|---|---|---|---|
| Absolute zero | -273.15 | -459.67 | 0 |
| Freezing point of water | 0 | 32 | 273.15 |
| Cold winter day | -10 | 14 | 263.15 |
| Room temperature | 22 | 71.6 | 295.15 |
| Body temperature | 37 | 98.6 | 310.15 |
| Hot summer day | 40 | 104 | 313.15 |
| Boiling point of water | 100 | 212 | 373.15 |
| Oven temperature (baking) | 180 | 356 | 453.15 |
Celsius vs Fahrenheit: Key Differences
The Celsius scale (°C) is the international scientific standard and used by most countries. It defines 0°C as the freezing point and 100°C as the boiling point of water at sea level. It was invented by Swedish astronomer Anders Celsius in 1742.
The Fahrenheit scale (°F) is primarily used in the United States. It defines 32°F as the freezing point and 212°F as the boiling point of water. Normal human body temperature is 98.6°F. It was invented by Daniel Gabriel Fahrenheit in 1724.
The Celsius to Fahrenheit Formula Explained
The exact formula is: °F = (°C × 9/5) + 32
Step-by-step example for converting 25°C:
- Multiply by 9: 25 × 9 = 225
- Divide by 5: 225 ÷ 5 = 45
- Add 32: 45 + 32 = 77°F
Quick mental trick: Double the Celsius, subtract 10%, add 32. For 20°C: 40 – 4 + 32 = 68°F (actual is 68°F — exact!).