# How do you calculate ppm from volume?

Category:
science
chemistry

If

**ppm**is expressed as THE**VOLUME**of particles to a unit**volume**of water, then**ppm**BY**VOLUME**is equal to µl/l. However, if**ppm**is expressed as THE MASS of particles in a unit**volume**of water, then**ppm**BY MASS is equal to mg/l. To**convert**from**ppm**by**volume**to**ppm**by mass, multiply by the density of the particles.

Likewise, how do I calculate ppm?

**Parts Per Million (ppm) Concentration Calculations**

- Write an equation representing the ppm concentration: ppm = mass solute (mg) ÷ volume solution (L)
- Extract the data from the question: mass solute (NaCl) = 0.0045 g.
- Convert the mass in grams to a mass in milligrams: mass NaCl = 0.0045 g = 0.0045 g × 1000 mg/g = 4.5 mg.

**Calculate Fertilizer Amounts**

- List all the variables: Desired concentration = 150 ppm. Injector ratio = 1:200; dilution factor = 200. Fertilizer analysis = 17-5-24 (17-percent nitrogen)
- Perform calculation: X = 150-ppm nitrogen x 200 ÷ 17-percent nitrogen X 75 =30,000 = 1,275 =23.53 or roughly 23 1/2 oz. per gal.
- Answer:

Also know, how do you convert ppm to volume percent?

A. A **percent** is 10,000 **parts per million**. In order to express the results as a **percent**, divide the nutrient content (which is expressed in **ppm**) by 10,000. For example, if the reported value for P_{2}O_{5} is 2,690 **ppm**, the calculation to **convert** to **percent** would be: 2,690 **ppm** ÷ 10,000 = 0.269%.

Just as per cent means out of a hundred, so **parts per million** or **ppm** means out of a million. Usually describes the concentration of something in water or soil. One **ppm** is equivalent to 1 milligram of something per liter of water (mg/l) or 1 milligram of something per kilogram soil (mg/kg).