Wednesday, October 2, 2013

How to Convert Temperature: Fahrenheit to Celsius and Celsius to Fahrenheit

How to Convert Temperature F to C and C to F

Many healthcare workers regularly convert temperatures. For example, the thermometer or monitor displays the patient's body temperature in one scale while the doctor's orders are specified in another scale.

I have included two charts: one for converting from degrees F (Fahrenheit) to degrees C (Celsius or Centigrade) and the other for converting from degrees C (Celsius or Centigrade) to degrees F (Fahrenheit). Each chart shows three different ways to convert the temperature. You might wish to choose the option that seems simplest to you and perhaps check your math with one or both of the other methods.
*Note that 0.556 is a rounded number. The technically correct number is 0.5555555.

Readers may also wish to review:

Find additional conversion charts, flash cards, practice tests, and more at Katrena's Student Survive 2 Thrive site map.

To convert
Celsius to Fahrenheit
use any of the following formulas
°F = °C X 9/5 + 32
  • Start with °C
  • Multiply by 9
  • Divide by 5
  • Add 32
°C multiply by 1.8 then add 32

To convert
Fahrenheit to Celsius
use any of the following formulas
°C = (°F - 32) X 5/9
  • Start with °F
  • Deduct 32
  • Multiply by 5
  • Divide by 9
°F minus 32 then multiply by 0.556

I hope you find these temperature conversion tips and directions to be helpful!


  1. Thank you for posting this site. this is helping me a great deal because I'm preparing to take a CNA credit exam for LPN and I ran up on this site. Thank you so much for this material.

  2. Thanks so much for the positive feedback!

  3. Great site! I find it helpful while studying as an LPN student!

  4. Thanks - one of the reasons I created this site was to give folks extra study guides and extra practice.


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