How do you convert grams per liter to parts per thousand?

Answer 1

One milligram per kilogram IS one part per million:

There are 1,000 milligrams in one gram and 1,000 grams in one kilogram.

1,000 mg = 1 g

1,000 g = 1 Kg

1,000 x 1,000 = 1,000,000

Answer 2

If it has the same density as water, the conversion is direct, just multiply the parts per thousand by 1,000. Otherwise, you need to convert the weight in milligrams to volume in milliliters. It takes 1,000,000 milligrams of water to equal a liter.

Answer 3

Since 1000 ml equal to one liter the number of grams will become parts per thosand. For example if there are 98 grams of a solute in one liter of water, the solution may be called as 98 parts per thosand.