Fahrenheit to Celsius Converter
Two-way converter: change Fahrenheit to Celsius or Celsius to Fahrenheit in one step.
Type a value in either field for an instant conversion
About converting Fahrenheit and Celsius
Fahrenheit is the temperature scale used in the United States, while Celsius is the standard almost everywhere else. Converting Fahrenheit to Celsius is common when reading US weather reports, recipes, lab data, or product manuals from the American market.
To convert Fahrenheit to Celsius, use the formula: °C = (°F − 32) × 5/9. The reverse formula handles the other direction automatically — type into either field.
Every calculation runs locally in your browser and updates instantly — nothing is uploaded, and the result appears the moment you type.
Why use this converter
Works both ways
Convert °F to °C or °C to °F by typing in either field.
Exact formula
Uses the standard temperature conversion formula with no shortcuts.
No install
Runs in any browser on phone or desktop, with no sign-up required.
Frequently asked questions
How do I convert Fahrenheit to Celsius?
Subtract 32 from the value and multiply by 5/9. For example, 100 °F = (100 − 32) × 5/9 ≈ 37.8 °C.
What is 32 °F in Celsius?
32 °F equals 0 °C — the freezing point of water.
What is 100 °F in Celsius?
100 °F is about 37.8 °C — close to normal human body temperature.
At what temperature do Celsius and Fahrenheit match?
At −40 degrees: −40 °F = −40 °C.
What is normal body temperature in Celsius?
98.6 °F is 37 °C, the figure commonly quoted for normal body temperature.