The Gram-to-Mole Bridge

One mole of any substance — 6.022 × 10²³ particles — weighs a specific number of grams: its molar mass. This molar mass calculator parses a chemical formula, counts every atom, and sums the atomic masses to find that number.

How the Parser Works

Type a formula like H₂SO₄ (as H2SO4): the calculator tokenizes element symbols and subscripts, resolves grouped formulas like Ca(OH)₂ and (NH₄)₂SO₄, and multiplies each atomic mass by its count. It covers the 48 most common elements — hydrogen through uranium.

Why You Need It

Every stoichiometric calculation starts here: dilutions, titrations, empirical formulas, and limiting reactants all convert between grams and moles using molar mass. Get this number right and the rest of the chemistry follows.