Molar Mass Calculator
Compute the molar mass of any chemical formula — H₂O, NaCl, C₆H₁₂O₆…
See how it works
Watch a quick simulation of this tool in action — no file needed.
How to use Molar Mass Calculator
Follow these steps — everything happens instantly in your browser.
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Step 1. Type a chemical formula using element symbols and counts (e.g. H2O, NaCl, C6H12O6).
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Step 2. Use parentheses for groups, e.g. Ca(OH)2 or Fe2(SO4)3.
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Step 3. Use proper capitalization — 'Co' is cobalt, 'CO' is carbon + oxygen.
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Step 4. See the molar mass (g/mol) and element breakdown update instantly.
Why use this tool
Private by design
All processing happens locally in your browser. Open DevTools → Network and you'll see zero file uploads. Ever.
Instant
No upload wait, no queue, no server round-trip. Results appear the moment you drop a file.
Free & unlimited
No accounts, no watermarks, no daily caps. Use it as many times as you like, forever.
Works everywhere
Desktop, tablet or phone — every tool is responsive and installable as a PWA for offline use.
Frequently asked questions
Everything you might want to know about molar mass calculator.
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