°F → °C

Degrees Fahrenheit to Degrees Celsius

Convert degrees Fahrenheit to degrees Celsius with an exact, deterministic calculation.

LIVE CONVERSIONDECIMAL ENGINE EXACT_

FROM · °FTO · °C-17.222222222222

1 °F = -17.222222222222 °C

FORMATPRECISION

FORMULA

How to convert

Convert °F to the base scale, then apply the °C scale and offset.

Example: 10 °F = -12.22222222 °C.

QUICK ANSWER

1 Fahrenheit

-17.222222222222 °C

REFERENCE TABLE

Fahrenheit to Celsius

degrees Fahrenheit	degrees Celsius
1 °F	-17.22222222 °C
5 °F	-15 °C
10 °F	-12.22222222 °C
25 °F	-3.88888889 °C
50 °F	10 °C
100 °F	37.77777778 °C

EDITORIALLY REVIEWEDAkhil Saroop · 16 August 2026

ABOUT THIS CONVERSION

Convert degrees Fahrenheit to degrees Celsius

To convert Fahrenheit to Celsius, subtract 32 first and then multiply by 5/9. This accounts for both the displaced zero point and the smaller size of a Fahrenheit degree.

Real-world example

A reading of 20 °F is -6.66666667 °C, which is below water’s freezing point. For medical temperatures, use the precision and method recommended for the thermometer rather than over-interpreting extra calculator digits.

Rounding and precision

Weather and room temperatures usually need no more than one decimal place. Laboratory work should follow instrument uncertainty. Preserve the offset calculation before rounding; rounding the intermediate Celsius or kelvin value can shift the final answer.

Regional context

Most countries report everyday temperature in Celsius, while the United States commonly uses Fahrenheit. Scientific standards use kelvin without the degree sign. Recipe temperatures must be checked for both scale and oven behavior.

Common mistake

Order matters: subtract 32 before multiplying by 5/9. Multiplying the original Fahrenheit value first produces an incorrect temperature.

Editorial method

Definitions and sources are listed below. Calculations retain more precision than the default display and round only for presentation.

USEFUL ANSWERS

°F to °C FAQs

What is 32 °F in Celsius?

Thirty-two degrees Fahrenheit is 0 degrees Celsius under the scale definition.

Is a Fahrenheit degree the same size as a Celsius degree?

No. A change of 1 °F equals a change of 5/9 °C.

How do I convert degrees Fahrenheit to degrees Celsius?

Enter the °F value in the calculator. It applies the scale offsets shown in the formula and returns the equivalent in °C; the formula and common-value table are shown on this page.

Is the °F to °C conversion exact?

Defined measurement relationships are calculated with decimal arithmetic from stored standards. The displayed answer may be rounded for readability. Currency results instead depend on the dated reference rate shown.

FROM UNIT

Fahrenheit

The Fahrenheit scale places water's freezing point at 32 °F and boiling point near 212 °F at standard pressure. Its stored scale and offset express readings as kelvin before conversion.

BIPM SI Brochure and exact international definitions ↗Definition verified 14 August 2026

TO UNIT

Celsius

Degrees Celsius use the same interval as kelvin, with 0 °C equal to 273.15 K. Its stored scale and offset express readings as kelvin before conversion.