Getting a realistic roofing estimate and free local quotes takes about a minute. Here’s exactly how FlatRoofCalculator.com works, from your first click to comparing quotes.
Pick the tool that matches your project — a specific material like metal or asphalt shingle, a service like repair or coating, or a measurement tool like the pitch or area calculator.
Add your roof size, material and a few options such as pitch, tear-off and access. Everything updates instantly — there is nothing to download and no sign-up.
Get an instant low-to-high cost range with a full breakdown, adjusted to labor rates in your city. Drill into your state and city for pricing that reflects your local market.
When you are ready, request quotes and we match you with up to three licensed, insured local roofers. Compare their prices side by side — there is no cost and no obligation to hire anyone.
Behind each tool is a real cost model, not a flat per-square-foot number. Our calculators estimate the individual line items of a roofing job — material and waste, underlayment or insulation, drainage, tear-off and disposal, and labor — then combine them into a total range. Material calculators use rates specific to that product, and geometry calculators use standard roofing math (rise over run, slope factor, and squares).
Every estimate is then multiplied by a local cost factor for your city, so the number you see reflects labor where you live, not a national average.
Requesting quotes is optional and only happens when you choose it. When you do, we pass your project details to up to three licensed, insured roofers who serve your area. They contact you directly with their own quotes, and you decide who — if anyone — to move forward with.
Yes. The calculators are free for homeowners, and so is being matched with local roofers. We are paid by the roofing companies in our network when we connect them with a homeowner — which is how we keep the tools free and up to date. Read more on our About page.
No. Every calculator is free to use on its own with no sign-up. Requesting quotes is a separate, optional step.
Up to three, from licensed and insured roofers who serve your area, so you can compare prices side by side.
We share your project details only with the roofers we match you with so they can quote your job. See our Privacy Policy for the full details.