# Roof Carpenter - Rafter Calc — Pitched Roof - Length & Angle > Roof and rafter calculator for tradesmen and handymen, with angle calculations. (iPhone/iPad app by David Tucker.) - Source: https://appshunter.io/ios/app/roof-carpenter-rafter-calc/id924855094 (this page in markdown: same URL + `.md`) - Developer: [David Tucker](https://appshunter.io/developer/924855093) - Category: Utilities, Reference - Price: $0.99 - Rating: 1.50/5 from 2 App Store ratings · 3 written reviews indexed - Age rating: 4+ - Requires: iOS 8.0 · 3 MB - Languages: American English - Released: 2014-10-22 - Data updated: 2026-09-06 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/roof-carpenter-rafter-calc/id924855094/reviews.md ## What is Roof Carpenter? Metric and Imperial roof/rafter calculating App including plumb and foot cut angles. For the tradesman and handyman alike. This app takes the hard work out of calculating rafter and hip/valley lengths to build a multi projection roof to a simple back yard pergola. Also use the app to calculate your plumb and foot cut angles with a handy bevel to transfer your angles. The app can also be used for calculating roof areas by multiplying the rafter length by the length of the building for example. To use the app simply select whether your measurement is in imperial or metric before you start and then type in the required roof pitch along with the 1/2 span or half of the width of the building together with the rafter spacing in the blank fields provided and the app will calculate the - Rafter length - Hip and Valley length. - Hip/Valley creeper rafter shortenings. - Roof rise per lineal meter or per 6 feet span. This app also displays the the hip, rafter, Jack rafter and foot cuts and these can be transferred in the following ways - Simply scribe from your smart phone screen to you roofing materials. - Utilise the mitre saw angle displayed on the screen and adjust your saw angle to suit. - Set your bevel from the image on screen - Lay your phone on your mitre saw and adjust it to you displayed angle. ## Key features - Rafter length calculation - Hip and valley length calculation - Plumb and foot cut angles - Roof area calculation - Metric and imperial support - Transferable angles for saws and bevels ## Recent user reviews (3 of 3) All indexed reviews: https://appshunter.io/ios/app/roof-carpenter-rafter-calc/id924855094/reviews.md ### 3/5 — Decimal point *2023-06-30* Very good app just need to be able to add decimal point ### 2/5 — Decimal points *2021-02-11* Unable to do decimal points and therefore inaccurate 5 stars if you were able to do so ### 1/5 — Useless *2020-05-06* This rafter App literally provides NO HELP in planning out the location of plumb and seat cuts in a rafter, the animation showing what angles various cuts should be provides no reference to plumb and level, making it absolutely useless. App FAIL ## Frequently asked questions about Roof Carpenter ### What is Roof Carpenter used for? Roof Carpenter is used to calculate rafter lengths, hip and valley lengths, and plumb and foot cut angles for pitched roofs. It also assists in calculating roof areas and transferring angles for cutting materials. ### Does Roof Carpenter support both metric and imperial units? Yes, Roof Carpenter allows you to select whether your measurements are in imperial or metric before you begin calculations, making it versatile for different project requirements. ### How can I transfer angles from Roof Carpenter? You can transfer angles by scribing directly from the smartphone screen, utilizing the displayed mitre saw angle to adjust your saw, setting your bevel from the on-screen image, or laying your phone on your mitre saw. ### What are the specific calculations Roof Carpenter provides? The app calculates rafter length, hip and valley length, hip/valley creeper rafter shortenings, and roof rise per lineal meter or per 6 feet span. It also displays hip, rafter, Jack rafter, and foot cuts. ### What devices is Roof Carpenter compatible with? Roof Carpenter is supported on iPhone and iPod devices. It is not currently listed for Android or other platforms. ### How often is Roof Carpenter updated? The latest version of Roof Carpenter is 2.2, which was last updated on April 18, 2020. This indicates infrequent updates in recent years. ### What is the price of Roof Carpenter? Roof Carpenter is a paid application, priced at $0.99. There are no in-app purchases or advertisements mentioned. ### What is the user sentiment for Roof Carpenter based on ratings? Based on 2 ratings, Roof Carpenter has an average rating of 1.5 stars. This suggests a generally negative user sentiment or significant issues reported by users. ## Version history (last 4 releases) ### 2.2 — 2020-04-18 Support for newer iOS versions ### 2.1 — 2016-03-23 This is a must have App for easy roof calculations. - Metric and imperial calculations. - Displayed mitre saw cut. - Re designed with larger text. - Helpful Tips screen for using the bevel. - Included foot or seat cut. The foot or seat cut is on the lower end of the rafter and enables the rafter to sit on the wall and forms part of the birds mouth cut. The cut is 90 degrees off the plumb cut of the hip or rafter to which you are cutting. If you are cutting a birdsmouth the rule of thumb is to leave 2/3 of the rafter on and measure from the top af the rafter down to achieve an even roof plane after the roof is constructed. ### 2.0 — 2016-01-19 This is a must have App for easy roof calculations. - Metric and imperial calculations. - Displayed mitre saw cut. - Re designed with larger text. - Helpful Tips screen for using the bevel. - Included foot or seat cut. The foot or seat cut is on the lower end of the rafter and enables the rafter to sit on the wall and forms part of the birds mouth cut. The cut is 90 degrees off the plumb cut of the hip or rafter to which you are cutting. If you are cutting a birdsmouth the rule of thumb is to leave 2/3 of the rafter on and measure from the top af the rafter down to achieve an even roof plane after the roof is constructed. ### 1 — 2014-10-20 No release notes. ## Apps similar to Roof Carpenter | App | Rating | Price | Category | | --- | --- | --- | --- | | [Carpentry Calculator](https://appshunter.io/ios/app/carpentry-calculator/id1586739365) | 5.0 (1) | Free | Utilities | | [Baluster Calculator Elite](https://appshunter.io/ios/app/baluster-calculator-elite/id689888381) | 4.9 (359) | $8.99 | Utilities | | [RoofNG PRO](https://appshunter.io/ios/app/roofng-pro/id6749808323) | 5.0 (1) | Free | Utilities | | [RoofCalc - Roofing Calculator](https://appshunter.io/ios/app/roofcalc-roofing-calculator/id1014237429) | 4.0 (9) | Free | Utilities | | [Roofing Calculator Pro](https://appshunter.io/ios/app/roofing-calculator-pro/id1637848178) | 3.8 (37) | Free | Utilities | | [Roof Guide - Carpentry Calc](https://appshunter.io/ios/app/roof-guide-carpentry-calc/id920670842) | 4.1 (16) | Free | Utilities | ## Related topics [rafter help](https://appshunter.io/ios/topics/rafter-help) · [rafter home](https://appshunter.io/ios/topics/rafter-home) · [hip roof framing calculator](https://appshunter.io/ios/topics/hip-roof-framing-calculator) · [red x roof](https://appshunter.io/ios/topics/red-x-roof) · [roof angle](https://appshunter.io/ios/topics/roof-angle) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-06.*