We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. This article describes the simple math used to convert between parts per million (PPM) and percentage, such as how we convert a measurement of 800 ppm of CO 2 in air (indicated on our colorimetric gas measurement tube shown at page top) and a percentage concentration of that same gas in air. We have no relationship with advertisers, products, or services discussed at this website.Ĭonvert ppm to percent or percent to ppm: In dilute water solutions, we can assume that 1 mL of water-based solution has a mass of 1 gram, so 1 liter of solution has a mass of 1000 grams.InspectAPedia tolerates no conflicts of interest.

This number is then multiplied by 100 and expressed as a percent. Determine the mass of solute and solution and then divide the mass of the solute by the total mass of the solution. Percent composition is the ratio parts of solute to one hundred parts of solution and is expressed as a percent. In dilute water solutions, we can assume that 1 mL of water-based solution has a mass of 1 gram, so 1 liter of solution has a mass of 1000 grams. This number is then multiplied by 10 6 and expressed as parts per million (ppm). To calculate parts per million, divide the mass of the solute by the total mass of the solution. It is often found in reports of concentration of water contaminants. Parts per million (ppm), is a ratio of parts of solute to one million parts of solution, and is usually applied to very dilute solutions. The units of molarity, mol/L, are usually represented by a scripted capital “ M”. This is the most widely used unit for concentration when preparing solutions in chemistry and biology. Masses of solute must first be converted to moles using the molar mass of the solute. Molarity describes the concentration of a solution in moles of solute divided by liters of solution. This measure of concentration is most often used when discussing the solubility of a solid in solution. Grams per liter represent the mass of solute divided by the volume of solution, in liters. California State Standard: Students know how to calculate the concentration of a solute in terms of grams per liter, molarity, parts per million, and percent composition.

How to calculate ppm solution