Solo Biz Soft Editorial Team Weather reports, recipes and science use different temperature scales. Here is how to convert between Celsius and Fahrenheit, plus a quick trick for doing it in your head.
The formula
Fahrenheit = Celsius × 9 ÷ 5 + 32. Celsius = (Fahrenheit − 32) × 5 ÷ 9.
Step by step
- To convert Celsius to Fahrenheit, multiply by 9 and divide by 5 (or multiply by 1.8).
- Add 32.
- To convert Fahrenheit to Celsius, subtract 32 first.
- Then multiply by 5 and divide by 9.
Worked example
20 °C × 1.8 = 36, plus 32 = 68 °F. Going back: 68 − 32 = 36, × 5 ÷ 9 = 20 °C.
Common mistakes
- Adding 32 before multiplying when converting to Fahrenheit
- Forgetting to subtract 32 first when converting to Celsius
- Mixing up the two directions
Skip the maths: use our free temperature converter. For other units, use the unit converter.
Frequently asked questions
What is 0 °C in Fahrenheit?
32 °F.
What is a comfortable room temperature?
About 20 to 22 °C, which is 68 to 72 °F.
What is Kelvin?
The scientific temperature scale. Kelvin equals Celsius plus 273.15.
More free tools: browse all our free calculators.
This article is general information only.
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