Use our online Percentage Concentration to Molarity Calculator to effortlessly convert weight/weight percentage (w/w) into molarity (mol/L). This essential tool helps chemists, students, and lab professionals quickly find accurate solution concentrations using percentage, density, and molar mass.
Formula:
Formula for Percentage Concentration (w/w) to Molarity Conversion
To convert percentage concentration by weight (w/w) to molarity (mol/L), use the following formula:
Molarity (M) = (P × d × 10) / MM
Where:
- P = Percentage concentration of the solute (weight/weight, as a number, e.g., 25 for 25%)
- d = Density of the solution (in grams per milliliter, g/mL)
- MM = Molar mass of the solute (in grams per mole, g/mol)
The factor of 10 is a combined conversion constant that accounts for converting the percentage to a decimal, the solution's mass to volume (using density), and expressing the final volume in liters rather than milliliters. Specifically, (P/100) * d (g/mL) * (1000 mL/L) / MM (g/mol) = (P * d * 10) / MM.