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What is conversion of ppm to percent?

Updated: 8/11/2023

Wiki User

12y ago

To convert ppm to wt%, you need to divide ppm with 1000000 to get to wt%.

For example:

If you have 4000ppm, it is the same as 0.004 wt%.

I dont agree with this answere.

Actually 4000ppm means 4000mg in 1Kg (1000g). Hence a simple solution is as under;

1000g contains 4000mg

or

1000g contain 4 gm. Hence 100g will contains 0.4 grams. This is the answere i.e. 0.4%

because % means amount present in 100 grams.

The first answer above should be:

To convert ppm to wt% (percent by weight), you need to divide ppm by 10,000.

For example:

If you have 4000 ppm, it is the same as 0.4 wt%.

If a lab result for the concentration of lead (Pb) in a paint chip sample is 10,400 ppm, the concentration in percent lead by weight is 1.04. If the result is reported as 1.04 % Pb by weight, then the concentration can be converted to 10,400 ppm.

Wiki User

12y ago

Wiki User

12y ago

Parts per million is going to be ten thousand times more than parts per hundred.