--- title: Protractor description: Determine angle of a surface --- [Skip to content](https://help.scanifly.com/protractor#main-content) English Show submenu for translations ![SCANIFLY-LOGO-Color-2022.jpg\]](https://help.scanifly.com/hs-fs/hubfs/SCANIFLY-LOGO-Color-2022.jpg?height=40&name=SCANIFLY-LOGO-Color-2022.jpg) Open main navigation Close main navigation - English Show submenu for translations Hi, how can we help you? - There are no suggestions because the search field is empty. 1. [Help Center](https://help.scanifly.com/?hsLang=en) 2. [Scanifly PV System Design](https://help.scanifly.com/scanifly-pv-system-design?hsLang=en) 3. [Site Assessment Tools](https://help.scanifly.com/scanifly-pv-system-design?hsLang=en#site-assessment-tools) # Protractor ## Determine angle of a surface ### 1. Locate the protractor tool in the menu on the right side of the Scanifly window ![](https://help.scanifly.com/hubfs/a083d3e-Protractor_2-png.png) **If you need to reset the protractor tool...** Use the ESC key to exit the tool. ### 2. Left click  to place an anchor point for the protractor A good anchor point is typically a ridge, eave or a spot on a roof surface where you can easily place the tool to go perpendicular to the tilt of the roof. ![](https://help.scanifly.com/hubfs/71f40c1-first_click_protractor-png.png) Left click on the node of the ridge. ### 3. Left click to place your second anchor point ![](https://help.scanifly.com/hubfs/9a2c6dd-2nd_click_protractor-png.png) Move the line so it is parallel with the ridge/perpendicular to the roof pitch then right click. ### 4. Left click at the 90 degree point to set your level ![](https://help.scanifly.com/hubfs/813fa5f-3rd_click_protractor-png.png) Left click at the 90 offset point. ### 5. Use your mouse to go up/down see the tilt angle of the roof surface you are measuring You want to make sure that you are careful to notice when the blue line fades into the roof. You want to go just above that point to get the most accurate roof pitch measurement using the protractor tool. ![](https://help.scanifly.com/hubfs/4a63214-protractor-JPG.jpeg) Tilt angle value. **Helpful Tip** For roof planes with no ridge, you can also measure the tilt using the eave.   - [Getting Started](https://help.scanifly.com/getting-started?hsLang=en#main-content) - [Start Here](https://help.scanifly.com/getting-started?hsLang=en#start-here) - [Technical Requirements](https://help.scanifly.com/getting-started?hsLang=en#technical-requirements) - [Scanifly PV System Design](https://help.scanifly.com/scanifly-pv-system-design?hsLang=en#main-content) - [Individual Features / Design Tools](https://help.scanifly.com/scanifly-pv-system-design?hsLang=en#individual-features-design-tools) - [Design Tools & Project Info](https://help.scanifly.com/scanifly-pv-system-design?hsLang=en#design-tools-project-info) - [Site Assessment Tools](https://help.scanifly.com/scanifly-pv-system-design?hsLang=en#site-assessment-tools) - [Exports](https://help.scanifly.com/scanifly-pv-system-design?hsLang=en#exports) - [FAQ's](https://help.scanifly.com/scanifly-pv-system-design?hsLang=en#faqs) - [Design Services](https://help.scanifly.com/scanifly-pv-system-design?hsLang=en#design-services) - [Customer Portal Admin](https://help.scanifly.com/customer-portal-admin?hsLang=en#main-content) - [Managing Projects](https://help.scanifly.com/customer-portal-admin?hsLang=en#managing-projects) - [Sharing Projects](https://help.scanifly.com/customer-portal-admin?hsLang=en#sharing-projects) - [User Settings](https://help.scanifly.com/customer-portal-admin?hsLang=en#user-settings) - [My Projects](https://help.scanifly.com/customer-portal-admin?hsLang=en#my-projects) - [Team Management](https://help.scanifly.com/customer-portal-admin?hsLang=en#team-management) - [Drone FAQs](https://help.scanifly.com/drone-faqs?hsLang=en#main-content) - [FAA Part 107 & Airspace](https://help.scanifly.com/drone-faqs?hsLang=en#faa-part-107-airspace) - [Photo Acquisition](https://help.scanifly.com/drone-faqs?hsLang=en#photo-acquisition) - [Drones](https://help.scanifly.com/drone-faqs?hsLang=en#drones) - [On-Site Photo FAQs](https://help.scanifly.com/on-site-photo-faqs?hsLang=en#main-content) - [Drone Training](https://help.scanifly.com/on-site-photo-faqs?hsLang=en#drone-training) - [Solar FAQs](https://help.scanifly.com/solar-faqs?hsLang=en#main-content) - [Weather Data](https://help.scanifly.com/solar-faqs?hsLang=en#weather-data) - [Production Factors](https://help.scanifly.com/solar-faqs?hsLang=en#production-factors) - [Request Services](https://help.scanifly.com/request-services?hsLang=en#main-content) - [Service Request Pricing](https://help.scanifly.com/request-services?hsLang=en#service-request-pricing) - [Service Requests Design Stages](https://help.scanifly.com/request-services?hsLang=en#service-requests-design-stages) - [Service Request Offerings](https://help.scanifly.com/request-services?hsLang=en#service-request-offerings) - [Scanifly iOS and Android App](https://help.scanifly.com/scanifly-ios-and-android-app?hsLang=en#main-content) - [Mobile Upload Troubleshooting](https://help.scanifly.com/scanifly-ios-and-android-app?hsLang=en#mobile-upload-troubleshooting) - [Mobile Device Requirements](https://help.scanifly.com/scanifly-ios-and-android-app?hsLang=en#mobile-device-requirements) - [Mobile App Training](https://help.scanifly.com/scanifly-ios-and-android-app?hsLang=en#mobile-app-training) - [Scanifly Remote Design](https://help.scanifly.com/scanifly-remote-design?hsLang=en#main-content) - [Remote Design Training](https://help.scanifly.com/scanifly-remote-design?hsLang=en#remote-design-training) - [Scanifly Proposal Tool](https://help.scanifly.com/scanifly-proposal-tool?hsLang=en#main-content) - [Getting Started](https://help.scanifly.com/scanifly-proposal-tool?hsLang=en#getting-started) - [Building a Proposal](https://help.scanifly.com/scanifly-proposal-tool?hsLang=en#building-a-proposal) - [Setup and Global Settings](https://help.scanifly.com/scanifly-proposal-tool?hsLang=en#setup-and-global-settings) - [Equipment and Variables](https://help.scanifly.com/scanifly-proposal-tool?hsLang=en#equipment-and-variables) - [Template Builder](https://help.scanifly.com/scanifly-proposal-tool?hsLang=en#template-builder) - [Integrations](https://help.scanifly.com/integrations?hsLang=en) - [Release Notes](https://help.scanifly.com/release-notes?hsLang=en#main-content) - [2026](https://help.scanifly.com/release-notes?hsLang=en#2026) - [2025](https://help.scanifly.com/release-notes?hsLang=en#2025) - [2024](https://help.scanifly.com/release-notes?hsLang=en#2024) - [2023](https://help.scanifly.com/release-notes?hsLang=en#2023) [![Chill listening crop-3](https://help.scanifly.com/hs-fs/hubfs/SCANIFLY-LOGO-2022.png?width=79&height=24&name=SCANIFLY-LOGO-2022.png "Chill listening crop-3")](http://scanifly.com) Scanifly, Inc. 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