Q:

# What is the best way to convert mg/kg to parts per million?

A:

If you are converting the mass of a substance from milligrams/kilograms (mg/kg) to parts per million (ppm), then the ratio is 1:1, and no conversion is necessary. Therefore, 1 mg/kg is the same as 1 ppm because 1 milligram is equal to 0.001 grams while 1 kilogram is equal to 1,000 grams. So, if you divide 0.001 by 1,000, then the result is 0.000001, which is a millionth of a gram, making it the same as 1 part per million.

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This logic only works for mass conversions. If you are attempting to convert mg/kg of volume or moles to ppm, then the substances being used will change the outcome. In the case of both volume and moles, ppm is found by using the formula c/s where "c" is the volume or moles of the compound divided by "s," which is the volume or moles of the solution.

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## Related Questions

• A:

The ratio of mass to volume of a substance is called density. Units of measure for density include kilograms per meter cubed and grams per centimeter cubed.

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• A:

To convert an amount from milligrams to milliequivalents, convert the amount given into millimoles by calculating the atomic weight and dividing it by the amount of the substance in milligrams. Then, multiply the amount in millimoles by the valence number to get the amount in milliequivalents.