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For roofers and contractors
Get roof measurements for quotes and job planning without a ladder, and share reports with customers and crews.
Free for roofers & DIY homeowners
Free Roof Measurement App
Measure roof area, pitch and dimensions from aerial maps. Trace every section, view a wireframe, and share professional roofing reports, all without climbing a roof.
Free to use100% ad-freeiOS & Android
Roof measurement software
Roof Measurement Software in Your Pocket
Roofs turns your phone or tablet into a roof measurement tool. Pick a property on a high-resolution aerial map, trace the roof, and get the numbers you need for quotes, repairs, replacements and planning.
Roof area and square footage
Trace the outline and get the total roof area in square feet, square meters or roofing squares.
Roof pitch and dimensions
Get pitch and dimensions along with area, so your numbers reflect the real roof surface and not just the footprint.
Ridge, hip, valley, rake and eave tracing
Trace each roof element with different colors to easily identify different edges and get their lengths.
Multi-section and complex roofs
Break complicated roofs into sections and measure each one. Use multiple layers to keep large projects organized.
2D Wireframe roof view
See your traced roof as a wireframe to check that every section and edge looks right before you rely on the numbers.
3D wireframe roof view
See your traced roof in 3D to check that every section and edge looks right before you rely on the numbers.
Multiple map views
Switch between satellite, hybrid, terrain and standard map types to get the clearest view of the roof.
Shareable PDF reports
Export clean measurement reports to share with clients, your team, or your own records.
GeoJSON Export
Export your traced roof as a GeoJSON file for use in GIS software or other mapping applications.
Simple roof measurement workflow
How to Measure a Roof from an Aerial Map
Measure a roof from the map, add the details you need, review the result, and create a report without getting on the roof.
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Find the property
Open Roofs and search or zoom to the roof on the aerial map.
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Trace the roof
Tap the corners of each roof section to outline it.
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Add roof elements
Mark ridges, hips, valleys, rakes and eaves.
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Apply the pitch
Set or review the roof pitch so the area reflects the sloped surface.
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Review the wireframe
Check the sections and edges before you finalize.
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Export your report
Share the area, pitch and dimensions as a clean report.
See it in action
Measure a Roof from an Aerial Map
See how Roofs makes it easy to trace roof sections, measure area and dimensions, check the roof wireframe, and create a report.
Roof area
Measured surface area
Roof pitch
Slope and dimensions
Roof elements
Ridge, hip, valley, rake & eave
Color-coded edges
Each roof element is easy to identify
Built for real roof measurement work
Roof Measurement for Pros and Homeowners
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For estimators and inspectors
Measure remotely, document each roof section, and keep your measurements organized across projects.
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For DIY homeowners
Find out how big your roof is before you buy shingles, ask for quotes or plan a repair. No account-heavy tools and no paid reports.
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For solar and property professionals
Check roof size and sections when planning installations or assessing a property.
Roof measurement guide
Roof Area Calculator: Square Footage and Roofing Squares
Roof area is not the same as the footprint of the house. A sloped roof has more surface area than the flat area beneath it, and the steeper the pitch, the bigger the difference. Roofs accounts for this when it calculates area.
Quick reference
To estimate roof surface area from the footprint, multiply by a pitch factor:
| Roof pitch | Multiplier |
|---|---|
| 3:12 | 1.03 |
| 4:12 | 1.05 |
| 6:12 | 1.12 |
| 8:12 | 1.20 |
| 9:12 | 1.25 |
| 12:12 | 1.41 |
What is a roofing square?
One roofing square equals 100 square feet (about 9.3 square meters) of roof. Contractors quote shingles and metal roofing by the square, so Roofs lets you view area in squares as well as square feet and square meters.
Want the full formulas for gable, hip and flat roofs?
Learn how roof type and pitch affect the total roof surface area.
Made for roof measurement
Why Choose Roofs?
Roofs gives you the tools to measure roofs from aerial maps without adding unnecessary complexity, subscriptions or ads.
Free · Ad-free · Built for roofing
Free to use
Many roof measurement services charge per report or require a subscription. Roofs is free.
100% ad-free
No ads or pop-ups interrupting your work.
Built for measurement
One focus: accurate aerial roof measurements, not a bundle of unrelated tools.
Works for pros and homeowners
Detailed enough for contractors, simple enough for first-time users.
Multiple area units
Square feet, square meters, squares, acres, hectares and more.
On iOS and Android
Measure from your phone or tablet.
Measurement accuracy
How Accurate Are Aerial Roof Measurements?
Roofs measures from high-resolution aerial imagery, so results depend on image quality, how carefully you trace the roof, and the pitch you apply. Aerial measurements are excellent for estimates, planning and quoting.
When exact construction dimensions are required, verify them on-site before ordering materials.
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Imagery quality
Results depend on the resolution and clarity of the available aerial imagery.
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How you trace
Carefully placing points around each roof section helps produce more reliable measurements.
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Roof pitch
Applying the correct pitch helps account for the sloped surface rather than measuring only the roof footprint.
Frequently asked questions
Roof Measurement App FAQs
Get answers to common questions about measuring roofs with aerial maps, calculating roof area, checking pitch, and sharing reports.
What is the Roofs app?
Roofs is a free aerial roof measurement app from Mapulator. It measures roof area, pitch and dimensions from high-resolution maps, with wireframe views and exportable reports.
Is Roofs really free?
Yes. Roofs is free to use and has no ads.
Can I measure my own roof without climbing on it?
Yes. Roofs works from aerial maps, so you can trace and measure a roof from the ground.
How do I calculate roof square footage?
Trace the roof outline in Roofs and the app calculates the area. You can view the result in square feet, square meters or roofing squares.
Does Roofs measure roof pitch?
Yes. Roofs calculates pitch along with area and dimensions.
Can I measure complex roofs with several sections?
Yes. Trace each section separately and use layers to organize larger projects.
Can I share or export my measurements?
Yes. Export a clean report and share it with clients or your team.
Is Roofs for professionals or homeowners?
Both. Contractors and estimators use it for quotes and job planning, and homeowners use it to size a roof before a repair or replacement.
How is Roofs different from the Mapulator app?
Mapulator measures land, distance and area. Roofs is a dedicated app for roof measurement, with pitch, roof element tracing and roof reports.
Is the measurement exact?
Aerial measurements are accurate for estimates and planning. Verify dimensions on-site when exact construction measurements are required.
Start measuring today
Measure Your Roof Today
Download Roofs free and get roof area, pitch and dimensions from an aerial map in minutes.