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Homework Help: Convert kcal to joules

  1. Apr 27, 2005 #1
    okay I'm having a total brain freeze right now,guess it's because of all the finals I'm studying for. Anyways...I need help converting kcal to joules. Very easy I know...but I'm dumbfounded right now.

    I have 14.4 kcal and I need to have joules.....so do I divide or multiply by 4186 J? Thanks for the help. :blushing:
  2. jcsd
  3. Apr 27, 2005 #2

    Doc Al

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    Staff: Mentor

    Multiply. 1 kcal = 4186 J. So 14.4 kcal = 14.4*4186 J.
  4. Apr 27, 2005 #3


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    Science Advisor

    Multiply. When in doubt, set up the conversion as an equation and get the units to end up the way you need them:

    [tex] (14.4 kcal)(4184 \frac{J}{kcal}) = ...[/tex]
  5. Apr 27, 2005 #4
    Neither! You multiply by 4186 J/kcal

    Edit: I took too long. All three answers so far are the same.
    Last edited: Apr 27, 2005
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