Fahrenheit to Celsius converter

How to convert degrees Fahrenheit to degrees Celsius

To convert degrees Fahrenheit to degrees Celsius, use °C = (°F − 32) × 5/9. For example, 68 °F is 20 °C. Type any value in the converter above and the result updates instantly.

The Fahrenheit to Celsius formula

The conversion is °C = (°F − 32) × 5/9. One degree Fahrenheit equals -17.2222 °C. The temperature formulas are exact; only the digits shown are rounded.

Fahrenheit to Celsius conversion table

Where degrees Fahrenheit and degrees Celsius are used

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

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

Worked examples

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

• 0 °F = -17.7778 °C
• 50 °F = 10 °C
• 72 °F = 22.2222 °C

Converting degrees Fahrenheit to degrees Celsius in your head

Subtract 30 and halve it: 70 °F is about 20 °C (exactly 21.1 °C).

Celsius to Fahrenheit 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 Celsius to Fahrenheit converter.