Fahrenheit to Celsius converter (°F to °C)
Convert Fahrenheit (°F) to Celsius (°C) with this free calculator. Type a value, press Convert, and the page applies the same factor shown in the formula below — no rounded shortcut, and nothing is stored on a server.
How to convert Fahrenheit to Celsius
100 degrees Fahrenheit is equal to 37.7778 degrees Celsius.
T(°C) = (T(°F) − 32) × 5÷9
Using the Fahrenheit to Celsius conversion formula:
Example: Convert 100°F to Celsius:
T(°C) = (100 − 32) × 5÷9 = 37.7778°C
What is a Fahrenheit?
Fahrenheit (°F) is the temperature scale used in the United States. Water freezes at 32 °F and boils at 212 °F.
What is a Celsius?
Celsius (°C) is the metric temperature scale. Water freezes at 0 °C and boils at 100 °C at standard pressure.
This page converts temperature from Fahrenheit into Celsius. Use the formula above for the exact relationship between the two units.
How this calculator works
The form on this page is a Fahrenheit-to-Celsius converter. After you enter a number, JavaScript multiplies or rearranges it with the published conversion factor and writes the °C result in the output box. The step-by-step panel repeats the arithmetic so you can copy it into homework or a spreadsheet.
Reviewed by Hamsen, founder of GigaTables and a biology engineer. See the about page for how formulas are checked before a tool is published.
FAQ
How many °C are in 1 °F?
Use the formula in the section above. Temperature and logarithmic units are not a single multiply-by-a-constant step.
How do I convert Fahrenheit to Celsius?
Using the Fahrenheit to Celsius conversion formula:
Is this °F to °C converter free?
Yes. GigaTables calculators are free to use in a browser. You do not need an account, and the values you type are not uploaded.