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  • picomoles to nanograms

    Hi - this is a silly question but I rarely do these convertions. Trying to convert 44 pmol/L of estradiol is in ng/L. The molarity of estradiol is 1pg/mL = 3.671/L

  • #2
    Re: picomoles to nanograms

    Originally posted by Unregistered
    Hi - this is a silly question but I rarely do these convertions. Trying to convert 44 pmol/L of estradiol is in ng/L. The molarity of estradiol is 1pg/mL = 3.671/L
    Per Wikipedia, the molar mass of estradiol is 272.38 g/mol
    So 44 pmol/L x 272.38 g/mol = 11985 pg/L = 11.985 ng/L
    (it should probably round to 12 ng/L).

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    • #3
      Re: picomoles to nanograms

      Thanks! - so you don't have to convert the molarity to picomoles? you can just use g/mol?

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      • #4
        Re: picomoles to nanograms

        Originally posted by Unregistered
        Thanks! - so you don't have to convert the molarity to picomoles? you can just use g/mol?
        Molarity is just a shorthand for moles per liter, which is what you started with. The 44 pmol/L could also be expressed as 44 picomolar.

        Conversion between grams and moles ALWAYS involves the molar mass. You may also have some prefixes to resolve. The 3.671 figure you mentioned is actually 1000 (from a prefix change) divided by 272.38.

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        • #5
          Re: picomoles to nanograms

          thanks for the lesson. much appreciated.

          Comment

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