Temperature Conversions

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The page below is a sample from the LabCE course The Fundamentals of Laboratory Math. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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Temperature Conversions

The most common scenario a laboratorian may face when converting temperature scales is the inter-conversion between Fahrenheit and Celsius.

  • When the temperature is measured in Celsius and needs to be converted to Fahrenheit, use the following calculation:
    °F = (°C x 9 / 5) + 32
    • Alternate formula: °F = (1.8)°C + 32

  • When the temperature is measured in Fahrenheit and needs to be converted to Celsius, use the following calculation:
    °C = (°F – 32) x 5 / 9
    • Alternate formula: °C = (°F – 32)/1.8
Examples of temperature scales being inter-converted using the above equations:
  • 25 °C would be converted to 77 °F
  • 104 °F would be converted to 40 °C
  • 0 °C would be converted to 32 °F
  • 212 °F would be converted to 100 °C
1. Emeka Udenze. "Temperature Scales." Wikimedia Commons, 01 Feb 2021. Available at: https://commons.wikimedia.org/wiki/File:Temperature_Scales.png.

The three major temperature scales. (1)