Mole Calculator

Convert between moles, mass, and number of particles using n = m/M and N = n × N_A. Calculate moles from mass and molar mass, find mass from moles and molar mass, determine number of particles from moles, or calculate molar mass from mass and moles. Features mass units (g, kg, mg, lb), amount units (mol, mmol, µmol), particle types (molecules, atoms, ions, formula units), and molar masses for 28+ common substances (H₂O, CO₂, NaCl, etc.). Perfect for chemistry students.