C to F Converter
Convert Celsius (°C) to Fahrenheit (°F) for weather, cooking, travel, and quick temperature checks. You can also swap direction to convert Fahrenheit back to Celsius.
C to F Converter tool
Enter a temperature, then convert. Press Ctrl/Cmd + Enter as a shortcut.
| Reference | °C | °F |
|---|
How Celsius to Fahrenheit conversion works
Celsius and Fahrenheit use different scale sizes and different zero points. To convert Celsius to Fahrenheit, multiply by 9/5 and then add 32.
- °F = (°C × 9/5) + 32
- Reverse: °C = (°F − 32) × 5/9
- Validation: the tool blocks values below absolute zero, which is −273.15°C
Use Celsius for many international weather and science contexts. Use Fahrenheit for everyday weather references in countries that commonly use °F.
Examples
- 0°C = 32°F — freezing point of water
- 20°C = 68°F — common room temperature reference
- 25°C = 77°F — warm weather reference
- 100°C = 212°F — boiling point of water
FAQ
- What is the formula for converting °C to °F?
The formula is °F = (°C × 9/5) + 32. Multiply Celsius by 9/5, then add 32.
- Can Celsius values be negative?
Yes. Celsius can be below 0, such as −10°C for cold weather. This converter supports negative temperatures.
- What is absolute zero in Celsius?
Absolute zero is −273.15°C. Values below that are not physically meaningful, so this tool marks them as invalid.
- Why does 0°C equal 32°F?
Celsius and Fahrenheit use different zero points and scale sizes. Water freezes at 0°C, which is 32°F.
- Does this converter store my temperature input?
No. The conversion runs locally in your browser and your input is not sent to a server.