Osmolarity Calculator Pro

Professional-grade osmolarity and osmolality calculator for laboratory, clinical, and research applications

Single Solute Calculation

Calculate osmolarity for a single solute solution

Concentration (g/L)

Molecular Weight (g/mol)

Dissociation Factor

Volume (L)

Formula & Information

Osmolarity = (C × i × 1000) / MW

C = Concentration (g/L)

i = Dissociation factor

MW = Molecular weight (g/mol)

• Normal plasma: 280-320 mOsm/L

• Hypotonic: < 280 mOsm/L

• Isotonic: 280-320 mOsm/L

• Hypertonic: > 320 mOsm/L