Composition and Concentration Calculator (ppm | wt% | mol% Interconversion) Chemical formula / sample name Calculation type Mass percent (wt%) composition Mole percent (mol%) composition Mixture composition (by components) ppm ↔ wt% ↔ mg/kg ppm ↔ mol% (requires molar mass/density) Molarity (mol·L⁻¹) Molality (mol·kg⁻¹) Sig figs 642810 Formula (for single-compound calculations) Supports nested parentheses, hydrate dot (· or .), brackets, isotopic notation ^13C (ignored) Sample mass Mass unit gmgkglboz Mixture components Add component For each component provide formula (or name) and mass. The tool computes wt% and mol%. Value Input unit ppmppbwt%mg/Lµg/L Density (kg·m⁻³ or g·mL⁻¹) If density not provided, assumes 1 kg/L (water) for mg/L conversions. Formula (for mol% conversion) Density (kg/L) Formula (solute) Amount (mol or g) Unit molg Volume Volume unit LmLµLft³gal Solvent mass Solvent mass unit kggmg Calculate Copy Results Export CSV
