Fahrenheit to Celsius Converter
Convert a Fahrenheit temperature to Celsius using C = (F - 32) x 5/9. Enter a value in degrees Fahrenheit to get the equivalent in degrees Celsius.
What this calculator does
The Fahrenheit to Celsius Converter estimates your result instantly from the values you enter, using standard math & conversions formulas. Convert a Fahrenheit temperature to Celsius using C = (F - 32) x 5/9. Enter a value in degrees Fahrenheit to get the equivalent in degrees Celsius. Calculations run in your browser, so nothing you type is sent to a server, and the output is an estimate rather than a certified or official figure.
Result
About Fahrenheit to Celsius Converter
This converter changes a temperature from Fahrenheit to Celsius using the standard formula C = (F − 32) × 5/9. Enter the Fahrenheit reading and the tool returns Celsius rounded to two decimals.
The two scales meet at −40 degrees, where Fahrenheit and Celsius read the same value.
Formula & Mathematical Calculation
Celsius (C) = f(Temperature (F))
Calculated according to standard math formulas implemented in the calculator core.
Calculation Example
Enter 77 °F. The tool computes (77 − 32) × 5/9 = 45 × 5/9 = 25 °C, and reports that 77 F equals 25 C.
Key Benefits
- Applies the exact C = (F - 32) x 5/9 formula
- Returns Celsius rounded to two decimals
- Works for negative temperatures below freezing
- Fast single-field conversion
How to Use this Calculator
-
Enter Fahrenheit
Type the temperature in the Temperature (F) field. -
Calculate
Select Calculate to apply the conversion formula. -
Read Celsius
Read the Celsius (C) box for the converted temperature.
Assumptions & Limitations
What the calculation assumes
- Every value you enter is treated as an exact, known amount.
- Any rate or interval you enter is assumed to hold for the whole period unless the form asks for it separately.
- Results use standard published formulas and account only for the values entered above.
- Rounding is applied for display; the underlying calculation uses your full precision.
- Results are returned in the same units you enter, unless the tool states the output unit.
What it does not cover
- Fahrenheit to Celsius Converter produces a calculated result for reference and learning, not a certified or official measurement.
- Real-world outcomes differ when tolerances, rounding rules or local standards apply.
- Definitions and standards vary by region and change over time; verify the convention that applies to your case.
- Figures are only as accurate as the inputs you supply — check them before acting on the result.
- For work where the result carries real consequences, confirm it against an authoritative source.
Frequently Asked Questions
Free to use, no account needed. Calculations run in your browser, so nothing you type is sent to a server. Results are estimates — how we build and check our calculators.