# S4 | perplexity/sonar-pro | run 2

## Prompt

Convert 72F to Celsius, to the nearest degree.

## Response

72 °F is approximately **22 °C** when rounded to the nearest degree. The exact value is about 22.22 °C, which rounds down to 22 °C.

Using the standard conversion formula from Fahrenheit to Celsius:
\[
^\circ C = (^\circ F - 32) \times \frac{5}{9}
\]

For 72 °F:
\[
^\circ C = (72 - 32) \times \frac{5}{9} = 40 \times \frac{5}{9} = \frac{200}{9} \approx 22.22^\circ C
\]

Multiple calculators and conversion tables give **72 °F = 22.22 °C**.[CK-12](https://www.ck12.org/flexi/physical-science/temperature-in-physics/convert-72-degrees-fahrenheit-to-celsius./)[Inch Calculator](https://www.inchcalculator.com/convert/fahrenheit-to-celsius/?degrees=72)[UnitCompare](https://unitcompare.com/fahrenheit-to-celsius/72)  

Rounding 22.22 °C to the nearest whole degree gives **22 °C**.[Symbolab](https://www.symbolab.com/calculator/conversion/temperature/72f-to-c)[Math Answers](https://math.answers.com/math-and-arithmetic/What_is_72_F_degrees_in_celsius)  

Do you want a quick mental shortcut for roughly converting Fahrenheit to Celsius without a calculator?
