ppm to molarity (M)
1 ppm in M at common molar masses
| Molar mass (g/mol) | 1 ppm |
| 58.44 (NaCl) | 1.711 × 10⁻⁵ M |
| 180.16 (glucose) | 5.551 × 10⁻⁶ M |
| 342.3 (sucrose) | 2.921 × 10⁻⁶ M |
| 1,000 | 1 × 10⁻⁶ M |
| 5,000 | 2 × 10⁻⁷ M |
| 10,000 | 1 × 10⁻⁷ M |
| 25,000 | 4 × 10⁻⁸ M |
| 66,500 (BSA) | 1.504 × 10⁻⁸ M |
| 150,000 (IgG antibody) | 6.667 × 10⁻⁹ M |
How to convert ppm to molarity (M)
- Enter the value in ppm above. The unit is already set.
- Type the chemical formula (NaCl, C6H12O6) or the molar mass in g/mol. For a protein, use its mass in daltons: 66,500 for BSA.
- The table shows the concentration in molarity (M) and in every other unit.
Frequently asked questions
What is the formula to convert ppm to molarity (M)?
Concentration in g/L = molarity × molar mass, so a mass concentration divided by the molar mass gives moles per litre. Convert the prefixes from there: 1 mg/mL is 1 g/L, 1 µg/mL is 1 mg/L.
What is 1 ppm of NaCl in M?
NaCl has a molar mass of 58.44 g/mol, so 1 ppm is 1.711 × 10⁻⁵ M.
Why do I need the molar mass?
ppm and molarity (M) measure different things: one counts mass, the other counts molecules. The molar mass, in grams per mole, links them, so the same mass of a heavy molecule is fewer moles.
Concentration unit pairs
Concentration Convertermg/mL to molarity (M)molarity (M) to mg/mLmg/mL to mMmM to mg/mLµg/mL to µMµM to µg/mLng/mL to nMnM to ng/mLmolarity (M) to ppmg/L to molarity (M)molarity (M) to g/Lpercent (w/v) to molarity (M)molarity (M) to percent (w/v)µg/mL to nMng/mL to µMmg/mL to percent (w/v)percent (w/v) to mg/mLµg/mL to ppmppm to µg/mLmg/L to ppmppm to mg/Lµg/mL to mg/mLmg/mL to µg/mLg/L to mg/mLmg/mL to g/Lng/mL to µg/mLµg/mL to ng/mL
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