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Rafter calculator with live roof diagrams

HammerCalc’s rafter calculator helps roof carpenters and framers work pitch, common rafters and hip math with interactive diagrams — inside the same construction calculator you use for everyday feet-and-inches work.

Try free for 7 days See all features

What this rafter & roof calculator does

Use visual sliders and diagrams to work through roof pitch and rafter lengths instead of hunting through lookup tables. HammerCalc pairs rafter tools with a modern keypad so layout and cut math stay in one app.

  • Interactive rafter and roof pitch tools with live diagrams
  • Built for framing and roof carpentry workflows
  • Works with feet, inches, fractions and mixed metric units
  • Keep plans open in the built-in PDF viewer while you calculate

A framing calculator that doesn’t feel like 1998

Legacy construction calculators bury roof tools in dense key sequences. HammerCalc puts the rafter calculator and roof tools behind clear visuals — without giving up pro-grade dimensional math.

FAQ

Does HammerCalc include a rafter calculator?

Yes. HammerCalc includes interactive rafter and roof tools with diagrams for job-site framing math.

Is there a roof pitch calculator too?

Yes. Work pitch and related rafter values visually inside the same app.

Get this tool on your iPhone, iPad & Mac

Stairs, square footage, feet & inches, metric & imperial — all in HammerCalc.

Download on the App Store ← Back to home