Convert PPM to molarity using this simple and accurate calculator. Enter the concentration in parts per million (PPM) and the molar mass (g/mol) to get the equivalent molarity instantly.
PPM to Molarity Calculator
Enter the PPM and molar mass into the calculator to convert it into molarity.
PPM to Molarity Formula
The following equation can be used to convert PPM to molarity:
Molarity (M) = (PPM × 10⁻³) ÷ Molar Mass
Where:
- M is molarity in moles per liter (mol/L)
- PPM is parts per million
- Molar Mass is in grams per mole (g/mol)
To convert from PPM to molarity, multiply the PPM value by 0.001 and then divide by the molar mass.
PPM to Molarity Conversions
Convert 500 PPM with molar mass of 58.44 g/mol
(500 × 0.001) ÷ 58.44 = 0.00856 M
Convert 200 PPM with molar mass of 18.02 g/mol
(200 × 0.001) ÷ 18.02 = 0.01110 M
Convert 1000 PPM with molar mass of 98.08 g/mol
(1000 × 0.001) ÷ 98.08 = 0.01019 M
Convert 250 PPM with molar mass of 34.01 g/mol
(250 × 0.001) ÷ 34.01 = 0.00735 M
PPM to Molarity Conversion Table
(For dilute aqueous solutions at 25°C, assuming density ≈ 1 g/mL)
| Compound | Formula | Molar Mass (g/mol) | 100 ppm → Molarity (M) | 500 ppm → Molarity (M) | 1000 ppm → Molarity (M) |
| Sodium Chloride (NaCl) | NaCl | 58.44 | 0.00171 M | 0.00856 M | 0.0171 M |
| Hydrochloric Acid (HCl) | HCl | 36.46 | 0.00274 M | 0.0137 M | 0.0274 M |
| Sulfuric Acid (H₂SO₄) | H₂SO₄ | 98.08 | 0.00102 M | 0.00510 M | 0.0102 M |
| Glucose (C₆H₁₂O₆) | C₆H₁₂O₆ | 180.16 | 0.000555 M | 0.00278 M | 0.00555 M |
| Calcium Carbonate (CaCO₃) | CaCO₃ | 100.09 | 0.000999 M | 0.00499 M | 0.00999 M |
| Sodium Hydroxide (NaOH) | NaOH | 40.00 | 0.00250 M | 0.0125 M | 0.0250 M |
| Potassium Nitrate (KNO₃) | KNO₃ | 101.10 | 0.000989 M | 0.00495 M | 0.00989 M |
Important Notes
- Density Assumption: For very dilute solutions, water density ≈ 1 g/mL. For concentrated solutions (>1000 ppm), use actual density.
- Temperature Effects: Molarity changes with temperature (unlike molality).
- Ionic Compounds: Values above assume full dissociation (e.g., 1 M NaCl → 1 M Na⁺ + 1 M Cl⁻).
PPM to Molarity Calculator
The PPM to molarity calculator provides an instant and accurate way to convert concentrations for chemistry, laboratory, and environmental science applications.
Just input your values for PPM and molar mass, hit Convert, and view the result in molarity (M).
PPM Definition
PPM (Parts Per Million) is a unit of concentration commonly used to measure very dilute solutions. It represents the number of parts of a substance per million parts of the total solution.
Molarity Definition
Molarity (M) is the measure of the concentration of a solute in a solution, expressed as the number of moles of solute per liter of solution. It is a fundamental unit in chemistry for expressing solution concentration.
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