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Molecular Weight Calculator

Calculate molar mass and elemental mass contributions from chemical formulas in your browser.

v1.0.0

Overview

Molecular Weight Calculator screenshot 1

Features

  • Browser-local molar mass calculation
  • Element counts, atomic weights, mass contributions and mass percentages
  • Positive integer or decimal stoichiometry and nested parentheses
  • Hydrate dot notation is unsupported; ASCII periods denote decimal counts

Version history

v1.0.0Current
Online edition
Open online

Usage examples

Elemental mass contributions for LiFePO4 and its assumed one-electron theoretical-capacity calculation: M=157.755 g/mol and Q=169.893 mAh/g.

LiFePO₄: from formula to theoretical specific capacity

Enter LiFePO4 and n=1 to reproduce 157.755 g/mol and about 169.893 mAh/g.

View case

Updates & usage guides

Follow our WeChat and Xiaohongshu accounts for Molecular Weight Calculator version updates, tutorials and case studies.

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