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Molar Mass Calculator - Free Chemistry Tool | IconVault

Enter a chemical formula like H2SO4 to get its molar mass and each element's mass share. Free, runs fully in your browser.

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Molar Mass Calculator

Molar mass and element mass share from a formula

5 of 5 free uses left

Use element symbols with subscripts as plain numbers, and parentheses for groups: Ca(OH)2.

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5 of 5 free copies left - everything runs on your device.

Molar mass of H2SO4

98.072 g/mol

Element composition

ElementAtomsMass (g/mol)Mass share
O463.99665.25%
S132.06032.69%
H22.0162.06%

Based on standard atomic weights. Percentages are mass fractions of one mole.

About this tool

IconVault's Molar Mass Calculator parses any chemical formula, including nested parentheses like Ca(OH)2, and returns the molar mass in g/mol plus a full breakdown of every element: its symbol, atom count, mass contribution and percentage of the total. It uses standard atomic weights for all elements.

Everything runs fully in your browser with nothing uploaded. It is free to try (repeated use may prompt for Pro), making it a quick companion for chemistry students, lab work and stoichiometry practice.

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