How to Form Equations for Temperature Scale Conversion

Fahrenheit to Celsius and Vice Versa

• 1

  Set "C" as temperature in Celsius degrees and "F" for Fahrenheit degrees. Place "C" on the left side of the equation. On the right side, write (F-32)---5 on the numerator of you fraction.

• 2

  Add the number 9 on the denominator to complete the Fahrenheit to Celsius equation. For example, if you want to find C when F=70, do C=(70-32)---5/9 = 190/9 = 21.1.

• 3

  Place F on the left side of the equation. On the other side, multiply the temperature value in Celsius degrees by 1.8.

• 4

  Add the product of the multiplication and 32 to come up with the temperature in Fahrenheit Degrees. For example, when C=40, F=(40---1.8)+32 = 104.

Celsius or Fahrenheit to Kelvin and Vice Versa

• 5

  Add 273.15 to the Celsius degree value to calculate its Kelvin equivalent. For example, 10 degrees Celcius is 273.15+10= 283.15. Therefore, the equation is K=C+273.15.

• 6

  Move 273.15 to the opposite side of the equation, giving it a negative sign, to form the Kelvin to Celsius equation (C=K-273.15). For example, when K=400, C=400-273 = 126.85.

• 7

  Replace Celsius with Kelvin on the Fahrenheit equation to form F=((K-273.15)---1.8)+32. Likewise, write the Fahrenheit to Celsius equation as K=((F-32)---5/9)-273.15.