How To Convert mg/kg Into ppm?

Question asked by Edward James:

Hello all,

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



Follow-up responses...

Conversion Of mg/kg Into ppm

posted by Greg:


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:

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:

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!!