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Measurements & units

Fahrenheit → Celsius

Convert temperatures from Fahrenheit to Celsius.

Your result

Complete the fields and calculate.

Calculation method and formula

(Value in °F [°F] − 32) × 5 ÷ 9

Understand the inputs

Value in °F
Unit: °F. Use a measured value or your own assumption.

Assumptions and limitations

Temperature conversion uses a scale factor and an offset. Temperature differences are different: a difference does not include the 32-degree offset.

The formula uses the specified units. Displayed numbers are rounded; whole packs, item counts and full time periods may also be rounded within the calculation.

Worked example

Illustrative values. Replace them with your own inputs for your calculation.

Value in °F
1 °F
Example result-17.222 °C

The result was calculated directly from your entries.

Sources and background: NIST: SI units and conversion factors

Model revision: October 17, 2026 · How CleverCalc works

FAQ

Frequently asked questions

How does Fahrenheit → Celsius work?+

(Value in °F [°F] − 32) × 5 ÷ 9. Temperature conversion uses a scale factor and an offset. Temperature differences are different: a difference does not include the 32-degree offset.

What assumptions should I consider for this result?+

Temperature conversion uses a scale factor and an offset. Temperature differences are different: a difference does not include the 32-degree offset. The formula uses the specified units. Displayed numbers are rounded; whole packs, item counts and full time periods may also be rounded within the calculation.

How accurate is the result?+

The formula uses the specified units. Displayed numbers are rounded; whole packs, item counts and full time periods may also be rounded within the calculation. Prices, measurements and model assumptions determine how well the result represents your situation.

Is this calculator free?+

Yes. Calculations and PDF export work without an account or registration.

What happens to my inputs?+

Calculations run in your browser. Results are saved locally only when you add them to My results; favourites and history are also local. Shared links contain your values. The currency tool requests the selected currencies from its rate provider without sending your amount.

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