Roof Framing Calc: 3D Metric
Rafter & Hip Roof Builder App
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
The metric roof framing calculator built for Australian, New Zealand, and UK builders. Enter span, pitch and rafter centres — get rafter length, cut angles, birdsmouth depth and a live 3D animation in seconds. Works completely offline on the job site.
Whether you're framing a gable, a hip roof with jack rafters, a skillion shed, or a gambrel barn — Roof Framing Calc handles it all. Every result calculated to AS1684 (Australian Standard) and NZS3604 (New Zealand Standard).
FREE FEATURES
- Gable roof calculator — span, pitch, rafter centres, ridge thickness, rafter depth
- All results instantly: rafter length, ridge height, plumb cut, seat cut, birdsmouth depth, ridge shortening, total rafters, rafter tail
- Live 3D animated roof frame — tap any rafter to see its measurements
- 2D cross-section engineering diagram — pinch to zoom, all dimensions labelled
- Pitch converter — degrees, X:12 ratio, % slope, mm per metre
- Save up to 3 projects
PRO FEATURES — from $2.08/month
- Hip roof calculator — hip rafter, backing angle, cheek cut, complete jack rafter table
- Skillion (mono-pitch) calculator — rafter length, wall height difference. Sheds, verandahs, carports
- Gambrel (barn) roof calculator — lower/upper rafters, knee height, knee joint bevel
- PDF cut sheet — A4 professional report, diagram included. Share via email, WhatsApp, print on site
- Material estimator — timber lineal metres, roof area m², sheet count, cost estimate
- Unlimited saved projects
- No advertisements. Ever.
BUILT FOR THE JOB SITE
Large inputs designed for work gloves. High contrast for outdoor sunlight. 100% offline — no internet on site needed. AU/NZ standard timber sizes built in: 90, 140, 190, 240mm rafters.
SUBSCRIPTIONS
• Pro Monthly: $4.99/month — 7-day free trial
• Pro Annual: $24.99/year — Save 58% — 7-day free trial — BEST VALUE
• Pro Lifetime: $44.99 one-time
Subscriptions renew automatically. Manage or cancel in App Store Settings at least 24 hours before renewal. Payment charged to your Apple ID.
Privacy Policy: https://mayatechlab.com/rfc_privacy_policy.html
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Bug Fixing and UI Updates
The developer, Maya Patel, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Diagnostics
Data Linked to You
The following data may be collected and linked to your identity:
- Identifiers
- Diagnostics
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Maya Patel
- Size
- 40.6 MB
- Category
- Utilities
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPad
Requires iPadOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Pro Monthly $4.99
- Pro Lifetime $44.99
- Pro Annual $24.99
- Copyright
- © MayaTechLab 2026