PPM Calculator

Find concentration in parts per million.

Concentration (ppm) 25

Formula: ppm = mg solute ÷ L solution

Step-by-step with your numbers:

1. Values used:

2. Solute mass = 50 mg

3. Solution volume = 2

5. Concentration = Solute mass / Solution volume = 50 / 2 = 25ppm

Did we solve your problem today?

Parts per million expresses very dilute concentrations.

The math behind it

For water, ppm = mg of solute ÷ L of solution (since 1 L water ≈ 1,000,000 mg).

50 mg in 2 L → 25 ppm.

ppb?

Parts per billion — 1000× smaller than ppm.