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  • Potassium conversion

    How to convert Potassium in mg to mEq & mmol?
    Last edited by pharmacist_mct; 07-22-2008, 05:35 AM.

  • #2
    Re: Potassium conversion

    Originally posted by pharmacist_mct
    How to convert Potassium in mg to mEq & mmol?
    The atomic weight (in unified atomic mass units or daltons) is also the molar mass is grams per mole. You can get each element from the periodic table, which includes atomic weights, and for a molecule, add up the weights of all the atoms in the chemical formula.

    Potassium is 39.0983 g/mol (39.10 is a good rounded value, or even 39, for many applications) Equivalence is based on the moles of electrons gained or lost in the ionized form from a mole of the substance. Since potassium has a valence of +1, moles and eqvs are identical. For something with a valence of +2 like calcium, one mole would be two eqv.

    So 39.10 mg = 1 mmol = 1 mEq. The relationship is generally unique for each substance and has to be computed from atomic weights, and valence observed in chemical reactions.

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    • #3
      Re: Potassium conversion

      Originally posted by pharmacist_mct View Post
      How to convert Potassium in mg to mEq & mmol?
      convert 40meq to mg

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      • #4
        Re: Potassium conversion

        Going by what was said above, 40 mEq must be equal to 40 mmol, as potassium has a valency of +1.

        One mole of potassium would weigh 39.10 grams.

        So 40 mmol would weigh 1.564 grams.

        40 mEq = 40 mmol = 1.6 grams, rounding off.

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        • #5
          Re: Potassium conversion

          please tell me how to convert 1mg of potassium to 8meq per day

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          • #6
            Re: Potassium conversion

            Please advise how to convert 20 meq of Potassium to milligrams.

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            • #7
              Re: Potassium conversion

              Originally posted by pwalters7391@cox.net View Post
              Please advise how to convert 20 meq of Potassium to milligrams.
              see post #2 or#4.

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              • #8
                Re: Potassium conversion

                10 meq equal to how many mg

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                • #9
                  Re: Potassium conversion

                  Originally posted by Unregistered View Post
                  10 meq equal to how many mg
                  see pots 2 and 4.
                  391 mg

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                  • #10
                    Re: Potassium conversion

                    Your replies are confusing. You say potassium is 39.10g then in another sentence it is 39.10mg. That is a life threathening difference. The average lay person is depending on and using this info.

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                    • #11
                      Re: Potassium conversion

                      Originally posted by Unregistered View Post
                      Your replies are confusing. You say potassium is 39.10g then in another sentence it is 39.10mg. That is a life threathening difference. The average lay person is depending on and using this info.
                      1 mol (mole) of K is 39.10 g. 1 mmol (millimole) is 39.1 mg (milligrams), 1 µmol = 39.1 µg. You have to understand metric prefixes and the symbols for them. In particular, mmol is not a typo, it is 1/1000 of a mole.

                      The numeric factor comes from the atomic or molecular weight, and for any other substance is a different value.

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                      • #12
                        Re: Potassium conversion

                        Originally posted by Unregistered View Post
                        Your replies are confusing. You say potassium is 39.10g then in another sentence it is 39.10mg. That is a life threathening difference. The average lay person is depending on and using this info.
                        For everyone reading this: - Please PLEASE if you don't understand what these values mean, and you are self medicating, you need to see your doctor pronto. Like the above poster said, it can be life threatening otherwise.

                        We are not ever intending to give out medical advice, none of us are qualified to do so, and have never intended any of our comments to be taken that way.

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                        • #13
                          Re: Potassium conversion

                          If a banana is 400 mg. of K, it should contain approximately 10 meq, correct?

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                          • #14
                            Re: Potassium conversion

                            Originally posted by Unregistered View Post
                            If a banana is 400 mg. of K, it should contain approximately 10 meq, correct?
                            Approximately, yes. (10.23 meq if you wish to be obsessive)

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                            • #15
                              Re: Potassium conversion

                              He said one mole of K is 39.1 g then he said one milli mole of K is 39.1 milli g!

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