How to Convert Body Temperature From Fahrenheit to Celsius

Written by rachel murray
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How to Convert Body Temperature From Fahrenheit to Celsius
Use a formula to convert body temperature from Fahrenheit to Celsius. (ballyscanlon/Digital Vision/Getty Images)

Fahrenheit, Celsius and Kelvin are scales used to measure temperature. Used in the United States, Fahrenheit is based on a scale that recognises 0 degrees C as the freezing point of water and 100 degrees C as its boiling point. Convert Fahrenheit degrees to Celsius with an online converter or temperature chart, or calculate the equivalent Celsius temperature with a formula. On the Celsius scale, 0 is freezing and 100 is the boiling point for water.

Skill level:
Moderately Easy


  1. 1

    Subtract 32 from the temperature in Fahrenheit. For example, if your body temperature is 37 degrees Celsius and you subtract 32, the result is 66.6.

  2. 2

    Divide the new total by 9. When you divide 66.6 by 9, the result is 7.4.

  3. 3

    Multiply the new total by 5. If you multiply 7.4 by 5, the result is 37. This number is the equivalent temperature in Celsius, 37 degrees.

Tips and warnings

  • Reverse the steps to convert Celsius back to Fahrenheit. Multiply the Celsius temperature by 9, divide the result by 5 and add 32 to the total. That gives you the temperature in Fahrenheit.

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