Roof area and square footage
Trace individual roof facets and calculate their pitch-adjusted surface areas. Work with flat or pitched roofs, multiple buildings, and roof layers in the same measurement.
Free roof measurement studio
Free roof measurement tool.
3D previews & PDF reports.
Measure a roof online for free with Vertex CRM. Start with satellite imagery or an uploaded roof photo, trace the roof, and set its pitch to calculate roof area and edge lengths. Explore your drawing in 3D and download a PDF roof measurement report.
No account required. Free to measure, edit, and export.
Live 3D preview
Example 1
Building your roof preview…
Built from the example’s traced facets, scale, and pitches. Drag to orbit; release to keep it turning. Right-drag to pan. Scroll to zoom.
01Trace roof facets
02Set pitch & scale
03Inspect in 3D
04Export a PDF report
Roof measurement tool
Learn by exploring
A roof for every practice run.
21 completed examples, ready to explore. Open a roof in 3D to orbit, inspect its facets, and explore its layers and pitches.
Showing 6 of 21 examples · Property and client names removed
Examples are for exploring the tools. Their measurements and roof heights are sample inputs, not verified site surveys. Roof tracing works best on a desktop or laptop.
How to measure a roof online
- 01
Choose your roof image
Click Create new Measurement, then search for a property and capture satellite imagery or upload a top-down roof photo. For uploaded images, set the scale against a distance you know.
- 02
Trace, classify, and set pitch
Outline each roof facet. Label eaves, ridges, hips, valleys, rakes, and flashing, then assign the pitch for each facet to calculate its sloped area.
- 03
Review and download
Check the drawing and 3D preview, finish any missing inputs, then generate and download your PDF report.
What can you measure with the free roof tool?
Use the browser-based drawing tools to document a roof for an estimate, compare roof sections, or understand a project before discussing it with a roofing contractor.
Ridges, hips, valleys, and eaves
Classify roof edges to organize their lengths in your report. Identify eaves at the lower roof boundary, ridges at the top, hips at outward intersections, and valleys where slopes meet inward.
Interactive 3D roof models
Inspect how roof facets and layers fit together. Rotate the model, zoom in, and review pitch inputs. Try the completed examples before creating your own roof drawing.
Downloadable PDF roof reports
Finish a drawing and export roof diagrams, facet pitches, areas, and classified edge lengths. Create a free account to save the measurement and add your company branding.
Roof area, pitch, and roofing squares explained
Why roof pitch changes the area
An overhead image shows the horizontal footprint of a roof. A sloped facet has more surface area than its footprint. A 6/12 pitch rises 6 inches for every 12 inches of horizontal run, giving an area multiplier of about 1.118.
For example, a facet with a 1,000 sq ft horizontal footprint and a 6/12 pitch has roughly 1,118 sq ft of roof surface. For roofs with different pitches, calculate each facet separately and add the areas.
Convert square feet to roofing squares
A roofing square is 100 square feet of roof area. Divide your measured square footage by 100 to convert it into squares. A 2,500 sq ft roof is 25 squares before waste.
Measured area is the starting point for a material estimate. Cuts, valleys, starter courses, ridge caps, and product coverage affect what you order. Verify the scale, pitch, and important dimensions before using a report for purchasing.
Roof area, edge lengths, and a report you can use
Use the same drawing and reporting tools available in Vertex CRM. Measure multiple buildings and roof layers, inspect facets in 3D, and download your work as a PDF.
Get the inputs right
This is an interactive measurement tool: you trace the roof and supply its pitch. An overhead image alone does not establish pitch. Image resolution, scale, perspective, and your tracing affect the result. Check critical dimensions on site before ordering materials.
Roof measurement questions
Can I calculate roof square footage online?
Yes. Trace each roof facet over a scaled overhead image and enter its pitch. The tool calculates pitch-adjusted roof area in square feet and combines the facets into a roof measurement. Your home’s floor area alone is not enough to determine its roof area.
How do I convert roof square feet to roofing squares?
One roofing square equals 100 square feet. Divide measured roof area by 100: a 2,500-square-foot roof is 25 roofing squares before any allowance for waste. Material quantities also depend on roof layout and product coverage.
Can I try the 3D roof viewer before measuring my own roof?
Yes. Explore the live preview or open a completed example directly in the 3D viewer. Orbit, pan, zoom, and inspect roof facets, pitches, and layers without signing in. The preview reconstructs the roof from the drawing and pitch inputs; it is not a site survey.
Does an address automatically generate a roof measurement?
No. An address helps you find satellite imagery. You still trace the roof, classify edges, and supply the roof pitch. Uploaded photos also need scale calibration using a known distance.
Is the roof measurement tool free without signing in?
Yes. You can start a measurement, edit roof facets and edge types, assign pitches, preview the roof in 3D, and generate PDF roof reports without creating an account. Measurements made without an account are not saved; create a free account to keep them.
How do I measure a roof from an address?
Select Create new Measurement to open the editor. Enter the property address, select the matching location in the satellite picker, and frame the roof. Capture the imagery, trace each roof facet, classify its edges, and enter the pitch. Satellite captures include a ground scale calculated from the map position and zoom.
Can I upload a drone photo or a top-down roof image?
Yes. Upload a clear overhead image and calibrate its scale using a known real-world distance. Perspective, lens distortion, image quality, tracing, and pitch inputs affect the measurements. Verify important dimensions on site before ordering materials.
What is included in the roof measurement PDF?
Completed drawings produce a report with roof diagrams, pitch-adjusted areas, facet pitches, and classified edge lengths such as eaves, ridges, hips, valleys, and rakes. Manually entered quantities can be downloaded as a summary PDF. When every step is finished, select Generate PDF report in the editor.
Where are my roof measurements saved?
Without an account, they are not saved anywhere, not even in your browser. Your measurement exists only while the editor is open, so download the PDF report before you close it. Create a free account to save measurements, reopen them on any device, and brand reports with your company details and logo. Address searches and satellite captures use the mapping provider.
Can I use the tool on my phone?
You can browse the page and enter measurements manually on mobile. Roof tracing needs a desktop or laptop with a larger screen and a mouse or trackpad. The tool explains this when you open the drawing editor on a phone.
Take your measurements into your roofing workflow
Explore Vertex CRM for managing roofing jobs, proposals, and customer records, or learn about the done-for-you roof report service.