40.66 Fahrenheit to C
See below how to convert any value in Fahrenheit to CDegrees , as wel as, the Fahrenheit to degrees C formula or equation.
To use this temperature calculator, simply type the Fahrenheit value in the box at left and you're done. The result will be shown in the box at right.

To convert a Fahrenheit value to the corresponding value in C, just use the formula:
[°C] = ([°F] − 32) × 5⁄9

What is Fahrenheit Scale
Fahrenheit was a German engineer, physicist and glass blower who devised a temperature scale and invented the mercury thermometer.
Fahrenheit is a temperature scale where the freezing point of water is 32 degrees Fahrenheit (°F) and the boiling point 212°F (at standard atmospheric pressure). This puts the boiling and freezing points of water exactly 180 degrees apart. The following formulas can be used to convert a temperature from Fahrenheit (°F) value to other temperature scales:
Fahrenheit to Celsius  [°C] = ([°F] − 32) × 5⁄9 
Fahrenheit to Delisle  [°De] = (212 − [°F]) × 5⁄6 
Fahrenheit to Kelvin  [K] = ([°F] + 459.67) × 5⁄9 
Fahrenheit to Newton  [°N] = ([°F] − 32) × 11⁄60 
Fahrenheit to Rankine  [°R] = [°F] + 459.67 
Fahrenheit to Reaumur  [°Ré] = ([°F] − 32) × 4⁄9 
Fahrenheit to Romer  [°Ro] = ([°F] − 32) × 7⁄24 + 7.5 

What is Celsius Scale
The Celsius scale was invented in 1742 by the Swedish astronomer Anders Celsius. It was initially defined by the freezing point of water and later changed its definition as being the melting point of ice. 100° C was defined as the boiling point of water. The Celsius scale is a derived scale once its defined in relation to the Kelvin temperature scale. 0 (zero) °C is exactly equivalent to 273.15 K, with a temperature difference of 1 °C equivalent to a difference of 1 K, meaning the unit size in each scale is the same. The Celsius temperature scale is sometimes referred to as the 'Centigrade' scale. Centigrade means divided into 100 degrees.
The following formulas can be used to convert a temperature from Celsius (°C) value to other temperature scales:
Celsius to Delisle  [°De] = (100 − [°C]) × 3⁄2 
Celsius to Fahrenheit  [°F] = [°C] × 9⁄5 + 32 
Celsius to Kelvin  [K] = [°C] + 273.15 
Celsius to Newton  [°N] = [°C] × 33⁄100 
Celsius to Rankine  [°R] = ([°C] + 273.15) × 9⁄5 
Celsius to Reaumur  [°Ré] = [°C] × 4⁄5 
Celsius to Romer  [°Ro] = [°C] × 21⁄40 + 7.5 


Using this converter you can get answers to questions like:

How many degrees Fahrenheit are in 40.66 degrees Celsius?

40.66 degrees Fahrenheit are equal to how many degrees Celsius?

how much are 40.66 Fahrenheit in degrees Celsius?

How to convert degrees Fahrenheit to degrees Celsius?

What is the conversion factor to convert from degrees Fahrenheit to degrees Celsius?

How to transform degrees Fahrenheit in degrees Celsius?

What is the formula to convert from degrees Fahrenheit to degrees Celsius? Among others.



