Satellite roof measurement tool
Type an address. The roof is traced on the satellite photo in a few seconds, and you get its real surface area, the squares to order and the perimeter. Drag a corner if the outline misses something.
What a satellite can and can't measure
From straight above, a roof looks flat. The outline on the photo is the footprint, and a pitched roof is always bigger than its footprint: 5% bigger at 4/12, 12% at 6/12, 41% at 12/12. That is why the tool asks for the pitch. If you're not sure, the roof pitch visualizer draws each one to scale.
What it doesn't give you is the facet-by-facet breakdown (ridges, hips, valleys and their lengths) that a paid aerial report or a tape measure does. For budgeting, checking a quote, or ordering roughly, the area and squares are what matter; for the final order, a roofer measures on site.
Already have the footprint from plans? The roof size calculator takes it directly, and the shingles calculator turns squares into bundles.
Ads stop the day you stop paying. Your website doesn't.
Paid clicks are rented. The homeowners who find your website on their own keep coming every month for free, and they already chose you before they clicked.
- You pay for every click, whether they call or not.
- Turn them off and the phone goes quiet the same week.
- Most clicks land on a contact form, and a lot of people leave right there.
- Google search, your Google Business listing, referrals, your truck and yard signs.
- They keep coming whether you run ads or not.
- With the instant quote they price their own job on your site and leave their name, phone and email, instead of leaving.
Every homeowner it turns into a lead is one you didn't pay an ad platform for. Put the same quote link on your Google Business listing and Facebook page, and those free visitors get a price too.
It doesn't replace your ads or bring visitors by itself: it makes the ones you have count, so you can lean on paid clicks less over time. A homeowner who found you and priced their own job is ready to talk to a roofer.
Satellite roof measurement questions
How do you measure a roof from satellite?
We find the building at the address in public building-outline datasets (Microsoft's machine-learned footprints, FEMA USA Structures and OpenStreetMap) and draw it on the satellite photo. That outline is the roof seen from straight above, the footprint. You pick the pitch, and the footprint times the pitch multiplier gives the sloped surface you actually cover.
How accurate is it?
In our own test on 112 Austin homes against the city's surveyed footprints, Microsoft's outlines came out at a median 99% of the surveyed area and 95% of the perimeter. Trees over the roof, covered porches and recent additions are where outlines go wrong, so look at the map and drag a corner if it misses something. The pitch is the bigger unknown: picking 4/12 on an 8/12 roof undercounts by about 12%.
Is it really free? Do I need an account?
Free, no account, no email. Print the sheet or save it as a PDF.
What if the house isn't found or the outline is wrong?
Draw it yourself: tap each corner of the roof on the map and close the shape. You can drag any corner of a detected outline too. The numbers follow the outline as you change it.
How is this different from an EagleView or RoofSnap report?
Paid reports measure every facet, ridge, hip and valley from oblique imagery, and cost money per report. This gives the overall roof area, squares and perimeter in seconds, which is what you need to budget, check a quote or price a job before the site visit. A roofer still measures on site before a final price.
I'm a roofer. Can my customers use this on my website?
Yes. The same map runs on your site with your rates, so homeowners see their roof measured and a price range, and you get their name, phone and the measured roof. Free for 15 days.
Let homeowners measure their own roof on your website.
The same satellite map, with your prices. They see a range, you get their name, phone and the measured roof, and you still visit and close in person.
- No card to start
- Your own rates
- One line to install, or we do it
- Homeowners see a range, never your final price