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ºF to ºC transformation - Fahrenheit to Celsius

There is a easy way to transform Fahrenheit into Celsius that should be good enough for general use. Just take 30 of the Fahrenheit value and then half that number. On the Fahrenheit scales, 32 degree Celsius and 212 degree Celsius is the temperature at which cold waters freeze and boil. Therefore simmering and freeze points are 180° apart.

Usual bodily temp. is 98,6 ? (in practice it varies around this value). The absolute zero point is -459.67°F. Today, the Celsius graduation is adjusted so that zero degree Celsius is the melting point of the frost (not the freezing point, which is different!).

On the other end of the range, 100 °C is the temperature at which it boils. Centigrade is now scientifically interpreted as Kelvin. The zero grade is 273.15K. 1 grade C corresponds to 1 Kelvin, so we can say that the point of boiling of water is 273.15 + 100 = 373.15 Kelvin.

What makes the conversion from Fahrenheit to Celsius so difficult? All of us know exactly how long zero cm or inch is, and can transform zero from any of these entities very simply into a different kind of entity. They are not constructed in the same easy way because they do not all begin at zero in the same place.

Setting the zero point to 0?, 0 and 0K would make the conversion between them much simpler, but Fahrenheit and Celsius were set before we could see where the zero point was, and as a consequence Fahrenheit, Celsius and Kelvin all begin with different readings. However, since these thermal entities have no zero in common, we must sum or deduct an offsets before performing our divisions or multiplications.

In order to change from Fahrenheit to Celsius, take 30 of the Fahrenheit value and then half that number.