FAQ: At what temperature are Celsius and Fahrenheit the same?

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At what temperature are Celsius and Fahrenheit the same?

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The formulas for converting between degree Celsius and degree Fahrenheit
are:

°F = (°C * 9/5) + 32
°C = (°F - 32) * 5/9

To find the temperature when both are equal, we use an old algebra trick
and just set ºF = ºC and solve one of the equations.

°C = (°C * 9/5) + 32
°C - (°C * 9/5) = 32
-4/5 * °C = 32
°C = -32 * 5/4
°C = -40

°F = (°F * 9/5) + 32
°F - (°F * 9/5) = 32
-4/5 * °F = 32
°F = -32 * 5/4
°F = -40

So the temperature when both the Celsius and Fahrenheit scales are the same
is -40 degrees.

 
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when is c and f equal


What Temperature Does Fahrenheit Equal Celsius?

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** What Temperature Does Fahrenheit Equal Celsius? **

Temperature at Which Fahrenheit and Celsius Are the Same

This thermometer displays the Fahrenheit and Celsius temperature scales.
The temperatures are the same at -40 degrees. - Andrew Johnson / Getty
Images
This thermometer displays the Fahrenheit and Celsius temperature scales.
The temperatures are the same at -40 degrees.  Andrew Johnson / Getty
Images
By Anne Marie Helmenstine, Ph.D.
Chemistry Expert

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By Anne Marie Helmenstine, Ph.D.

Updated April 08, 2016.

-*Question: *What Temperature Does Fahrenheit Equal Celsius?-

There is one point on the Fahrenheit and Celsius scales where the
temperatures in degrees are equal. This is -40 °C and -40 °F. If you
can't remember the number, there is a simple algebraic method to find the
answer.

*Answer: *Rather than converting one temperature to another (not helpful
because it assumes you already know the answer), you set degrees Celsius
and degrees Fahrenheit equal to each other using the conversion formula
between the two temperature scales:

°F = (°C * 9/5) + 32
°C = (°F -


Source: chemistry.about.com/od/temperatureconversions/f/What-Temperature-Does-Fahrenheit-Equal-Celsius.htm

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