Rafter Pro
A clean web version of my Rafter Pro IOS app with instant calculations, guided inputs, diagrams, saved values, and a polished mobile-friendly layout.
Inputs
Enter pitch or rise and the app derives the other value.
How it works
Enter the run and centres, then choose whether you want to drive the calculation by roof pitch or total rise. Results update instantly and stay saved in your browser.
Results
Lengths, bevels and derived values for the current roof setup.
Help
Quick Start
- 1. Enter the run of rafter.
- 2. Enter either roof pitch or total rise.
- 3. Enter centres.
- 4. Review the calculated sizes and angles.
Inputs
Roof pitch is the angle to the horizontal. Total rise is the vertical height from wall plate to ridge. Centres are the spacing between rafters. Changing pitch recalculates rise, and changing rise recalculates pitch.
Results
Click any result card to view a focused explanation and diagram. Use Copy Summary to share values with Messages, Mail, or notes apps.