Rafter Tools+ for iPhone-iPad is a rafter calculator for complex roof framing angles that other roof framing calculators don't offer. Calculating common rafters with a construction calculator is fairly easy, but to be a master carpenter you need more roof framing angle information then the construction calculators offers. With the Rafter Tools Plus app you'll be able to calculate all of the complex angles for roof framing.

The calculator displays the hip rafter plumb line shift dimensions to precisely layout hip rafters for equal pitched or irregular hip roofs with any eave angle (0° - 180°). Calculate and layout the witches cut precisely with Rafter Tools Plus (Square Tail Fascia) using the hip rafter plumb line shift dimensions.

Display the hip rafter roof framing angles with easy to use Framing Square Usage. Calculates the lengths of common rafters, jack rafters and hip rafters. With ridge and hip rafter width deductions. Use it to calculate Pentagonal, Hexagonal or Octagonal Roofs.

Timber Framing Angles calculated from Bartok, Hawkindale, Martindale and McKibben-Gray Hip-Valley Roof Ratios Angle Formulas. Timber Framing Angles definition are just a click away in the app.

Standard Rake Walls and Hip Rake Walls rotated into the roof surface plane.
Devers-Canted Hip Rafters

Tréteaux Angles and Claw Line Dimensions for WorldSkill Carpentry Training. tréteau à dévers... Trestles with tilt

What's New

Version 1.1.4

Updated to IOS 11 and fix a bug in the Rafter Lengths calculator for equal overhang lengths.

Customer Reviews

Great Teaching Tool!!!


Hip roof systems are by no means easy and with all the helpful articles and drawings that are included in this app you will be cutting hips in no time! Screen shot of this program does no justice to how many angles and information is given. This app is extremely optimized for timber framing as you are able to change the dimensions of your hip and jack rafters, plus explains all the timber framing angles. If you ever plan on cutting a hip take the guess work out of it and by this app!!

Great app

Kitty bisons

Awesome. It’s about time there was an app for complex roof framing.

Not good for framing in my opinion

Pastor Scott Williamson

I was looking for an app that would give run length for roof framing based on rise and run. This failed to meet my expectations


Sim Ayers
58.7 MB
Requires iOS 11.0 or later. Compatible with iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPhone 8, iPhone 8 Plus, iPhone X, iPad Air, iPad Air Wi-Fi + Cellular, iPad mini 2, iPad mini 2 Wi-Fi + Cellular, iPad Air 2, iPad Air 2 Wi-Fi + Cellular, iPad mini 3, iPad mini 3 Wi-Fi + Cellular, iPad mini 4, iPad mini 4 Wi-Fi + Cellular, 12.9-inch iPad Pro, 12.9-inch iPad Pro Wi-Fi + Cellular, 9.7-inch iPad Pro, 9.7-inch iPad Pro Wi-Fi + Cellular, iPad (5th generation), iPad Wi-Fi + Cellular (5th generation), 12.9-inch iPad Pro (2nd generation), 12.9-inch iPad Pro Wi‑Fi + Cellular (2nd generation), 10.5-inch iPad Pro, 10.5-inch iPad Pro Wi‑Fi + Cellular, and iPod touch.
Age Rating
Rated 4+
© SBE Builders


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

More By This Developer

You May Also Like