Fahrenheit to Celsius Converter — Free
Convert temperature readings between Fahrenheit, Celsius and kelvin. The conversion accounts for different zero points, unlike a length conversion that only multiplies by a fixed factor.
- Runs in your browser
- Nothing is uploaded
- No signup; device limits apply
Numbers stay on your device. Nothing is sent to a server.
How to use this tool
Enter a temperature and select its current scale. Values below absolute zero are rejected; distinguish an actual reading from a change in temperature before using the result in a formula.
Results and examples
32 degrees Fahrenheit equals 0 degrees Celsius and 273.15 kelvin. A change of 18 Fahrenheit degrees instead equals a change of 10 Celsius degrees, without applying the zero-point offset.
Limitations
- Instrument uncertainty and significant figures are not inferred from the input.
- The form converts readings, not temperature intervals as a separate mode.
Fields
| Field | Guidance and constraints |
|---|---|
| Temperature | Accepted range: -400–3000 · Input step: 0.01 |
| From | Celsius / Fahrenheit / Kelvin |
| To | Celsius / Fahrenheit / Kelvin |
Data handling
Processing stays in the current browser tab; the site does not upload tool input for the calculation itself.
Sources
Frequently asked questions
What is 32 degrees Fahrenheit in Celsius?
32 degrees Fahrenheit equals 0 degrees Celsius and 273.15 kelvin. A change of 18 Fahrenheit degrees instead equals a change of 10 Celsius degrees, without applying the zero-point offset.
Can I convert a temperature difference the same way?
Instrument uncertainty and significant figures are not inferred from the input. The form converts readings, not temperature intervals as a separate mode.
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