TOW Rafter & Roof Calculator
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Have questions about a roof pitch calculation, suggestions for a new tool feature, or a building code inquiry? Send a message to our engineering team.

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About The Calculator

Part of The Other Way Field Utility network. Engineered for carpenters, framers, and DIY builders to calculate safe, IRC-compliant common roof rafters and bird's mouth cuts.

Master Roof Guides

  • Bird's Mouth Cut Guide
  • Roof Pitch Ratios
  • Ridge Deductions
  • Rafter Tails & Overhangs

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