Osmolarity measures the total concentration of dissolved particles in a solution — important in biology and medicine because it's the particle count, not the molecule count, that drives osmosis across cell membranes.
Osmolarity measures the total concentration of dissolved particles in a solution — important in biology and medicine because it's the particle count, not the molecule count, that drives osmosis across cell membranes. This calculator finds osmolarity from molarity and the number of particles each molecule breaks into.
A 0.15 M NaCl solution (dissociates into 2 particles: Na⁺ and Cl⁻). Osmolarity = 0.15 × 2 = 0.3 Osm/L.
A measure of solute concentration expressed as osmoles per liter of solution.
Molarity × number of particles the solute dissociates into.
It affects fluid movement across cell membranes, critical for IV fluids and dehydration understanding.