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Celsius to Fahrenheit converter
Enter a number, fraction, power, π, or arithmetic expression.1 °C = 33.8 °F °F = (°C × 9/5) + 32
Ready for local conversionCelsius to Fahrenheit formula
°F = (°C × 9/5) + 32
Multiply by exactly 9/5, then add exactly 32
The scales align at −40 degrees, while water freezes at 0 °C and 32 °F under the standard reference relationship.
How to convert Degrees Celsius to Degrees Fahrenheit
Multiply the Celsius temperature by 9/5, then add 32. Do not multiply by a single constant because the two scales have different zero points.
Example calculation
A temperature of 20 °C is exactly 68 °F: (20 × 9/5) + 32 = 68.
20 °C = 68 °F
When this conversion is useful
Use Celsius to Fahrenheit for weather reports, oven settings, thermostats, travel planning, and interpreting health or laboratory temperatures for a US audience.
Common Degrees Celsius to Degrees Fahrenheit conversions
| Degrees Celsius (°C) | Degrees Fahrenheit (°F) |
|---|---|
| -40 | -40 |
| 0 | 32 |
| 20 | 68 |
| 37 | 98.6 |
| 100 | 212 |
| 180 | 356 |
Celsius to Fahrenheit FAQ
Multiply Celsius by 9/5 and add 32: °F = (°C × 9/5) + 32.
The two scales show the same numerical value at −40 degrees.
It can be rough near everyday weather temperatures if you then add about 30, but the exact calculation uses 9/5 and 32.