How To Convert mg/kg Into ppm?

posted by Edward James on 08 May 2010 at 5:28 am

Hello all,

Can someone please tell me how I can convert mg/kg into ppm's (parts per million)?



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Conversion Of mg/kg Into ppm

posted by Greg on 08 May 2010 at 7:34 am


A conversion of mg/kg to ppm is 1:1. To convert to parts per million, you don't need to do anything other than take the mg/kg off the end and add ppm on to the end.

To explain:

1 mg = 0.001 grams
1 kg = 1,000 grams

0.001 / 1,000 = 1/1,000,000 = one ppm.


Conversion From Gram To Ppm

posted by lawboonpin on 12 April 2011 at 9:30 pm

I would like to know in 500g of weight used in 500 litre of water, how much would it be in ppm?

No, You Need To Know The Atomic Weight Of The Substance

posted by Dave on 19 January 2013 at 5:53 am

No, if you want to know how much lead is in water (for example), you cannot take mg/kg and call that ppm, because lead had a different atomic weight than water!!

note: this forum thread is now closed.