Fahrenheit to Celsius Converter
Convert degrees Fahrenheit to degrees Celsius with the exact conversion factor, a worked example and a quick-reference table. Runs entirely in your browser.
This converter turns degrees Fahrenheit into degrees Celsius instantly using the standard definition of both units. It includes the formula, a worked example, and a quick table for common amounts, and it works for any value you type — including decimals and negatives where they make sense.
Quick reference — degrees Fahrenheit to degrees Celsius
How to use this calculator
- Enter the value in degrees Fahrenheit in the input box.
- Read the result in degrees Celsius — it updates as you type.
- Use the Swap button to convert in the opposite direction.
- Check the quick-reference table for common degrees Fahrenheit amounts.
The formula
°C = (°F − 32) × 5/9
Worked example
212 °F = 100 °C — in full, 212 degrees Fahrenheit converts to 100 degrees Celsius. Weather forecasts, oven settings and science work are the everyday jobs for this conversion.
Frequently Asked Questions
How do I convert degrees Fahrenheit to degrees Celsius?
Use the formula °C = (°F − 32) × 5/9. For example, 212 °F becomes 100 °C. The converter above applies the same formula instantly for any value you type.
What are the reference points in Fahrenheit and Celsius?
At standard pressure, water freezes at 32 °F and boils at 212 °F. In degrees Celsius those same points are 0 °C and 100 °C. Normal body temperature, 37 °C, reads 37 °C.
What is 212 degrees Fahrenheit in degrees Celsius?
212 degrees Fahrenheit is 100 degrees Celsius, using the formula °C = (°F − 32) × 5/9. The converter above applies it instantly for any value, including negative temperatures.
Why does converting degrees Fahrenheit to degrees Celsius need addition or subtraction?
Temperature scales do not share the same zero point, so a simple ratio is not enough — each formula combines the 9/5 (or 5/9) degree-size ratio with an offset. Kelvin is the exception that proves the rule: it starts at absolute zero (−273.15 °C), so Celsius-to-Kelvin only shifts by 273.15.