TEMPERATURE CONVERSION
Fahrenheit to Celsius converter
Convert fahrenheit to celsius instantly.
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No regional currency, unit or language profile is applied. This choice does not convert values or change formulas, results, routes or legal guidance.
1 °F equals
-17.222222222222 °CInstant fahrenheit to celsius conversionCalculated locally in your browser using the stated conversion formula.Fahrenheit to Celsius conversion guide
Use this calculator when comparing measurements, checking specifications, planning travel, preparing materials or reading information published in another unit system. Enter any value above to receive the converted result immediately.
Worked example: 10 °F equals -12.22222222 °C. The displayed result is rounded for readability while the calculator retains full numeric precision.
About Fahrenheit and Celsius
- Fahrenheit
- Degrees Fahrenheit use 180 intervals between the traditional water freezing and boiling reference points. Imperial or US customary measurement, depending on the unit.
- Celsius
- Degrees Celsius use the same interval size as kelvins, with zero set at 273.15 K. International System of Units (SI) or an SI-derived metric unit.
Precision and common mistakes
Celsius/Fahrenheit conversion applies both 5/9 scaling and a 32-degree offset. Temperature conversions include an offset as well as a scale factor. The calculator keeps the full catalogued factor internally and rounds only the displayed value.
- A temperature difference and an absolute temperature use different offset rules.
- Temperature values cannot be converted by a simple unit factor when scale origins differ.
- Keep the original value and unit together when copying a result, especially when specifications use several measurement systems.
Fahrenheit to Celsius table
1 °F-17.22222222 °C
5 °F-15 °C
10 °F-12.22222222 °C
25 °F-3.88888889 °C
50 °F10 °C
100 °F37.77777778 °C
Frequently asked questions
How do I convert fahrenheit to celsius?
Enter a fahrenheit value. The converter applies the defined temperature-scale relationship and displays celsius instantly.
Is this Fahrenheit to Celsius conversion accurate?
The calculator uses the stated conversion relationship and keeps full internal precision before formatting the displayed answer. For regulated or safety-critical work, confirm the required rounding standard.
Can I use this converter on a phone?
Yes. The calculator is responsive, keyboard accessible and performs the conversion locally in a modern browser without requiring an account.
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Verification and calculation details
- Purpose
- Fahrenheit to Celsius converter
- Variables and units
- Use the labelled fields and units shown in the calculator. Results use those units unless a conversion is stated.
- Formula and method
- The exact formula and worked example are shown below. Deterministic formula executed locally in the browser.
- Assumptions
- Only entered values and stated assumptions are included. Local fees, rules and professional requirements are excluded unless explicitly shown.
- Engine version
- 1.0.0
- Production verification baseline
- Release 63 · source
998803f - Verification run
release-v63-2026-09-20- Last verified
- — Automated release checks passing
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How this calculator works
Convert Fahrenheit to Celsius through the Celsius reference scale using the internationally defined temperature relationships.
Important notes
Results are estimates based on the values entered. Confirm rates, prices, units and professional requirements that apply in your location. Review the Answer Atlas Calculation Standard and corrections policy for formula, privacy and correction rules.