Roof Replacement Cost Estimator

Estimate what a new roof will cost from your roof area — or your home's footprint and pitch — with editable material, tear-off, and labor rates.

📖 How it works & FAQ

How do you want to size the roof?

Roof area (sq ft)

Home footprint (ground-floor sq ft)

Roof pitch

Roofing material

Material price low ($ per sq ft)

Material price high ($ per sq ft)

Tear-off & disposal ($ per sq ft)

Labor ($ per sq ft)

— Estimated total (low – high)

— Roof area used

— Installed cost per sq ft

What drives roof replacement cost

Three numbers decide most of a roofing bill: how big the roof is, what it is covered with, and what it costs to get the old roof off and the new one on. This calculator multiplies your roof area by an editable price per square foot for the material you pick, then adds tear-off and labor per square foot, and shows the total as a low–high range. Asphalt shingles usually land around $3.50–$5.50 per square foot for materials, metal around $8.50–$11.50, and tile around $10–$14 — but every rate in the tool is editable, so you can plug in the numbers from a local quote. If you only know your home's footprint, choose the footprint option and the tool applies a pitch factor: a steeper roof has more surface than the floor plan below it. Everything runs in your browser; nothing is uploaded or saved. Estimates only — not professional or financial advice; material prices, labor rates & local permit fees vary widely, so always compare several written quotes.

How to use it

Choose whether you know your actual roof area or want to estimate it from your home's footprint.
Enter the square footage. For footprint mode, pick the roof pitch that best matches yours — 4/12 to 6/12 is typical for most houses.
Pick a roofing material. The low and high price per square foot fill in automatically, and you can edit both.
Adjust the tear-off and labor rates to match your area or a quote you have received.
Read the low–high total, your roof area in squares, and the installed cost per square foot — results update live as you type.

FAQ

What is a roofing square?: One square is 100 square feet of roof surface. Roofers quote in squares; the tool shows both units.
Do I always need tear-off?: Usually yes — most codes allow at most two shingle layers. Set tear-off to $0 for new construction or an approved overlay.
How accurate is the footprint method?: Footprint × pitch factor approximates a simple gable roof; hips, dormers, and overhangs add area, so pros also add roughly 10–15% for waste.
Which material is cheapest over time?: Asphalt costs the least upfront but lasts 15–30 years. Metal and tile cost two to three times more but can last 50+ years, so the per-year cost gap is smaller than it looks.