Molecular Geometry Calculator

Determine molecular shape using VSEPR theory
Dynamic Formula Parser - Enter ANY Chemical Formula!

Number of atoms bonded to central atom
Number of lone electron pairs
Dynamic Calculator: Enter ANY chemical formula! Supports ions (e.g., NH4+, SO4(2-)). Central atom should be first.
Formula Name BP LP Geometry Bond Angle Action
Dynamic Calculator
Enter ANY chemical formula!
Automatically calculates geometry using VSEPR theory and valence electrons.
Features
  • ✓ Parse any formula (CH4, NH3, etc.)
  • ✓ Support ions (NH4+, SO4(2-))
  • ✓ Auto-detect central atom
  • ✓ Calculate bonding/lone pairs
  • ✓ Show 3D ASCII diagrams
  • ✓ 26 geometries covered
Try These Examples
VSEPR Theory
Notation
AXnEm
A = Central atom
X = Bonding pairs (n)
E = Lone pairs (m)
Common Geometries
  • Linear: 180°
  • Trigonal Planar: 120°
  • Tetrahedral: 109.5°
  • Trigonal Bipyramidal: 90°, 120°
  • Octahedral: 90°
  • Pentagonal Bipyramidal: 72°, 90°
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Support This Free Tool

Every coffee helps keep the servers running. Every book sale funds the next tool I'm dreaming up. You're not just supporting a site — you're helping me build what developers actually need.

500K+ users
200+ tools
100% private
☕ One-time support Buy me a coffee 📚 Learn & support 9-Book Bundle - $9 Stay updated Follow @anish2good
Privacy Guarantee: Private keys you enter or generate are never stored on our servers. All tools are served over HTTPS.
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