Note that this is not a simple multiplication: the scales have different zero points, so 32 °F equals 0 °C and the two scales meet at −40°. The table includes freezing, room temperature, body temperature and boiling point so you can orient any value quickly.
Calculator
Formula used
°C = (°F − 32) × 5/9 · °F = °C × 9/5 + 32
How to use the Fahrenheit to Celsius Converter
- Type a temperature in Fahrenheit.
- Read the Celsius value.
- Or type Celsius to convert to Fahrenheit.
- Use the table for reference points such as freezing and boiling.
About this tool
The Fahrenheit to Celsius Converter is built for speed and accuracy: every calculation runs in your browser, so your data never leaves your device and the result updates as you type. It works equally well on a phone, a tablet or a desktop, and it is free to use as many times as you like.
Common use cases
- Converting a weather forecast.
- Setting an oven or thermostat correctly.
- Checking a fever reading in Celsius.
- Following a recipe written in the other scale.
Tips for the best result
- Use the latest figures you have - even a small change in rate or term can shift the outcome by hundreds.
- For annual figures, divide by 12 to get a monthly number you can compare with the result.
- Bookmark this page and revisit the calculation as the inputs change.
Frequently asked questions
What is the quick way to estimate F to C?
Subtract 30 from the Fahrenheit value and halve the result. It is approximate but close enough for weather.
Where do the scales meet?
At −40°, where −40 °F equals −40 °C exactly.
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