Celsius to Fahrenheit converter

How to convert degrees Celsius to degrees Fahrenheit

To convert degrees Celsius to degrees Fahrenheit, use °F = °C × 9/5 + 32. For example, 10 °C is 50 °F. Type any value in the converter above and the result updates instantly.

The Celsius to Fahrenheit formula

The conversion is °F = °C × 9/5 + 32. One degree Celsius equals 33.8 °F. The temperature formulas are exact; only the digits shown are rounded.

Celsius to Fahrenheit conversion table

Where degrees Celsius and degrees Fahrenheit are used

Celsius is the everyday temperature scale in almost every country: weather, cooking, health and science.

Fahrenheit is the everyday temperature scale in the United States: weather, ovens and body temperature.

Worked examples

These examples use the formula above, so you can check the converter or do the same by hand:

• -20 °C = -4 °F
• 0 °C = 32 °F
• 20 °C = 68 °F

Converting degrees Celsius to degrees Fahrenheit in your head

Double it and add 30 for a quick estimate: 20 °C is about 70 °F, and the exact answer is 68 °F.

Fahrenheit to Celsius reference table

For the opposite direction, these values are handy to have at hand:

Common mistakes to avoid

• Temperature scales have different zero points, so you cannot simply multiply: you must add or subtract an offset as well.
• A difference of 1 °C equals a difference of 1.8 °F, but 0 °C is 32 °F, not 0 °F.

About this converter

The converter accepts whole numbers, decimals and negative values, gives the result as you type, and uses full precision internally, so what you copy is as accurate as it can be. It runs in your browser: nothing you type is sent to a server, it keeps working offline once the page has loaded, and there is nothing to install.

Need the opposite direction? Use the Fahrenheit to Celsius converter.