RedX Roof - Rafter Calculator

In-app purchases
4.3
741 reviews
100K+
Downloads
Content rating
Everyone
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About this app

RedX Roof Pro is a powerful 3D Roof Builder, Roof Blueprint Generator, and Rafter Calculator built for contractors, framers, and serious DIYers.

Now featuring a full 3D Roof Framing Engine that automatically generates:

• Common rafters
• Hip rafters
• Valley rafters
• Jack rafters
• Gable roofs
• Roof sheathing layouts

Design complete roof systems in interactive 3D, view individual rafters, and instantly generate professional roof blueprints with labeled parts and full cut lists. Print, export, and bring accurate framing plans directly to the job site.

• 3D ROOF BUILDER & BLUEPRINT GENERATOR
• Automatic roof framing layout
• Construction-ready roof blueprints
• Framing plans with labeled rafters
• Detailed cut sheets and material lists
• Roof plan drawings (top view & side view)
• Printable framing diagrams
• Exportable PDF blueprints
• Individual rafter inspection mode

Create accurate roof framing drawings without manual calculations.

CLASSIC ROOF TOOLS (Included)

Common Rafter Calculator
Generate precise rafter lengths, rise, fascia height, tail length, and birdsmouth cuts in 2D and 3D.

Hip Rafter Builder
Create detailed hip roof framing plans with backing angles, jack rafters, bevel cuts, and full measurements.

Valley Builder
Generate ridge length, sleeper board length, valley rafter lengths, and intersecting roof angles with full 3D framing plans.

Plywood Angle Calculator
Calculate plywood bevel and intersection angles with to-scale cutting diagrams.

Gable Truss Builder
Design gable trusses with accurate dimensions and printable truss blueprints.

Also includes tools for gambrel roofs, dormers, turret roofs, bay roofs, and truss hip rafters.

KEY FEATURES
• 3D roof design software
• Roof blueprint generator
• Roof framing plans & drawings
• Construction-ready roof layouts
• Rafter cut list generator
• Material list generator
• Roof pitch calculator

Supports CM, MM, Feet & Inches

All-in-one roof framing and blueprint software designed to save hours of layout and calculation time.

We regularly add new features. View updates inside the app.

Terms Of Use
https://www.redxapps.com/terms-of-service
Updated on
Feb 12, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

4.2
716 reviews
Chris Shaver
December 13, 2020
After watching many youtube vids, everyone has a different method to calculate dimensions, and they all come up with different values which left me guessing. This app takes the guessing out of the equation! It's easy to plug in your info, and the amount of detail you get is awesome. If I were a carpenter or did this work more often, i would definetly buy this app!!
30 people found this review helpful
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Lucas LaMarti
November 14, 2021
The calculations are accurate but when zooming in on the diagram it is extremely difficult to see and there's no way to full screen the diagram. I was hoping that sending it to my email or printing it out would make it more eligible, it doesn't, in fact they remove the function to zoom when sent through email. What good are the calculations if you can't see them?.
13 people found this review helpful
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Amorim Damiao
September 12, 2023
This is a robbery. If they had given people the opportunity to test all the apps' functionality, I swear I wouldn't pay for the Pro version. The 3D doesn't work, the support leaves something to be desired, it even seems like they are trying to guess the solutions. After complaining, they gave me a URL to open the apps in the Browser. Believe me, it doesn't work. Sometimes it opens, sometimes it doesn't. And it's slow as hell. Developers of this app, listen carefully, do you know how much 1
8 people found this review helpful
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What’s new

This update has changes to the cut list and blueprints.