Temperature
Celsius to Fahrenheit
Scale then shift. Multiplication first, addition second — reversing them changes the answer.
The Formula
F = C x 9/5 + 32
Scale then shift. Multiplication first, addition second — reversing them changes the answer.
| Symbol | Meaning | Unit | Notes |
|---|---|---|---|
| C | Reading in degrees Celsius | degrees Celsius | Negative values are normal below freezing. |
| F | Reading in degrees Fahrenheit | degrees Fahrenheit | Equals C only when both are -40. |
What Each Symbol Means
Cdegrees Celsius
Reading in degrees Celsius
Negative values are normal below freezing.
Fdegrees Fahrenheit
Reading in degrees Fahrenheit
Equals C only when both are -40.
See It Worked With Real Numbers
A formula on its own does not tell you which number goes where. The how to convert celsius to fahrenheit page applies this equation to a concrete case, shows every intermediate step, and names the mistakes that produce a wrong answer even when the algebra is right.
Where This Formula Appears
This equation is the working core of How To Convert Celsius To Fahrenheit, filed under Unit Conversion. Every number the guide produces comes from substituting into this one line.