How to use the Celsius to Fahrenheit converter
Enter the temperature in degrees Celsius. The calculator multiplies it by 9/5 and adds 32.
Celsius to Fahrenheit formula
The Celsius and Fahrenheit scales have different zero points and interval sizes, so this is not a simple multiplication-only conversion.
Example: Lily converts a weather forecast
Lily sees a forecast of 20°C. Multiplying 20 by 9/5 and adding 32 gives 68°F. The temperature scales also agree at −40°, where −40°C equals −40°F.
For a temperature change rather than an actual temperature reading, multiply the Celsius change by 9/5 without adding 32.
Multiply before adding 32
For 20°C, multiply 20 by 9/5 to get 36, then add 32 to get 68°F. At -40 degrees, both scales show the same number.
A converted oven temperature is only a temperature reference. Fan settings, thermostat calibration and recipe instructions can affect the setting you need.
Celsius-to-Fahrenheit reference table
Multiply Celsius by 9/5, then add 32. These are temperature readings; a temperature change uses the 9/5 factor without the 32-degree offset.
| Celsius (°C) | Fahrenheit (°F) |
|---|---|
| -40 | -40 |
| -10 | 14 |
| 0 | 32 |
| 10 | 50 |
| 20 | 68 |
| 25 | 77 |
| 30 | 86 |
| 37 | 98.6 |
| 100 | 212 |
Assumptions and limitations
What the estimate assumes
This converts temperature scales only and does not account for measurement uncertainty.
Sources and reference material
Celsius to Fahrenheit Converter FAQs
What is 20°C in Fahrenheit?
68°F.
What is 0°C in Fahrenheit?
32°F.
What temperature is the same in Celsius and Fahrenheit?
-40 degrees is the same numerical value on both scales.
Can Celsius go below zero?
Yes. The Celsius scale includes negative temperatures.
Temperature-scale conversion for general use.