Free molarity calculator for chemistry students, lab technicians, and researchers. Solves for molarity, mass, or volume instantly. Live PubChem lookup auto-fills molar masses and densities as you type. Built-in unit conversion, Advanced Mode with thermal-expansion correction, interactive graphs, and cited worked examples. Enter any two values and get the third in seconds - ideal for buffers, dilutions, and stock solutions, with formulas straight from the IUPAC Gold Book and Vogel.
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Hi everyone, we built this for a real workflow pain: our team kept losing time to manual molar-mass lookups while prepping buffers and standards.
The two things we're most proud of:
1. The PubChem search: type a chemical name and the molar mass fills itself in. No more alt-tab to a reference table.
2. Answer-first lab math: every calculation shows its formula and cites the source (IUPAC Gold Book, Vogel's). You can check the result by hand.
We'd love feedback on anything: unit coverage, the trend graph, or which calculator you'd want next on the site. Happy to answer questions all day!