Celsius to Fahrenheit Converter
Convert Celsius to Fahrenheit as you type, including decimals and negative values.
Convert Celsius to Fahrenheit
Type a temperature and the equivalent in Fahrenheit updates as you go.
Decimals and negative values are fine, try -40, the point where both scales agree.
Common conversions
| Celsius (°C) | Fahrenheit |
|---|---|
| -40 | -72 |
| -10 | -18 |
| 0 | 0 |
| 20 | 36 |
| 37 | 66.6 |
| 100 | 180 |
| 212 | 381.6 |
A Fahrenheit degree is exactly 5/9 of a Celsius degree, so 1 °C = 1.8 °F, 0 °C = 32 °F, and −40 °C = −40 °F.
Frequently Asked Questions
Multiply the Celsius value by 1.8 and add 32. So 25 °C becomes 25 × 1.8 + 32 = 77 °F, and 0 °C is 32 °F.
−40 °C is exactly −40 °F. It is the only temperature where the two scales agree, and it exists because the Fahrenheit scale's zero was set using the coldest temperature its inventor could reproduce with the thermometers of the time.
Subtract 32 and multiply by 5/9. So 77 °F becomes (77 − 32) × 5/9 = 25 °C.
Yes. Body temperature, cooking temperatures and weather readings are all decimals: 37 °C is exactly 98.6 °F, and the converter keeps those digits rather than rounding to a whole degree.
No. The conversion happens in your browser as you type, so nothing is uploaded or stored.