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PPM to Molarity Calculator

Chemistry
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Converts parts per million (ppm) to molarity (mol/L) for solutions. This calculation requires the solute's molecular weight and the solution's density.

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How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Concentration (ppm), Solute Molecular Weight, and Solution Density in the units shown.

Step 2

Read Molarity in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

Example calculations

See the inputs and their calculated results.

NaCl in Water (Low)

Concentration (ppm): 50 ppm; Solute Molecular Weight: 58.44 g/mol; Solution Density: 1 g/mL

Molarity: 0.000855578371 mol/L

NaCl in Water (Medium)

Concentration (ppm): 200 ppm; Solute Molecular Weight: 58.44 g/mol; Solution Density: 1 g/mL

Molarity: 0.003422313484 mol/L

Glucose in Water (Low)

Concentration (ppm): 75 ppm; Solute Molecular Weight: 180.16 g/mol; Solution Density: 1 g/mL

Molarity: 0.0004162966252 mol/L

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