Saltbox Rafter Calculator
Roof Pitch Framing
$1.99 · Designed for iPad. Not verified for macOS.
Build and check saltbox roof layouts in minutes, right from the jobsite.
Saltbox Roof Calculator is made for roof framers, carpenters, builders, contractors, and serious DIY users who need clear roof framing numbers without manual trigonometry or spreadsheet work.
Enter the building size, front span, roof angles, overhangs, wall height, timber sizes, rafter spacing, birdsmouth seats, and optional battens. The app calculates the measurements you need for planning, cutting, layout, and material takeoff.
Key features:
- Metric and inch input modes
- Equal or exact rafter spacing
- Ridge, front rafter, and rear rafter material lengths
- Roof area, wall height, pitch, soffit drop, and spacing results
- Running ridge and wall measurements for mark-out work
- Optional batten layout and linear length
- Native diagrams for plan, profile, front rafter, and rear rafter
- Export a complete PDF with inputs, results, and diagrams
- Copy summaries, material lists, and running measurements
- Works offline with professional jobsite-friendly defaults
Use it when you need a focused saltbox roof tool instead of a generic construction calculator. Get the numbers, review the diagrams, export the PDF, and keep the crew working from the same clear measurements.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Vladislav Zhirnov, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Vladislav Zhirnov
- Size
- 5.6 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later. - iPad
Requires iPadOS 17.6 or later. - Mac
Requires macOS 14.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.3 or later.
- iPhone
- Languages
English and 32 more
- English, Arabic, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Malay, Norwegian Bokmål, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Slovak, Slovenian, Spanish, Swedish, Thai, Traditional Chinese, Turkish, Ukrainian, Vietnamese
- Age Rating
4+
- 4+
- Copyright
- © zhirnov.zsystems

