ppm to mg/l

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ppm to mg/l

Postby rocky1231 » Tue Nov 01, 2011 6:43 pm

wanna convert 40 ppm to mg/l
Posts: 1
Joined: Tue Nov 01, 2011 6:40 pm

Re: ppm to mg/l

Postby christain » Thu May 03, 2012 11:06 am

Many resources you find show mg/L the same as ppm, but its not exactly true.

Pure water at standard temperature and pressure has a density of 1 kg/L, therefore:

mg/L = mg/kg = ppm

But that is only true when using pure water at standard temperature and pressure. Any other substance will have a different density and will not be a direct conversion between mg/L and ppm.

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