Roof Replacement Cost Calculator
Estimate what a new roof costs — enter your roof size, pitch, material and whether you need a tear-off to get a low-to-high total, the cost per square, and a materials-versus-labor breakdown.
How much does a roof replacement cost?
A new roof is priced by the square — one square covers 100 sq ft of finished roof — and the total is driven by four things: your roof's true sloped area, its pitch, the material you pick, and whether the old roof is torn off and hauled away. For a typical single-family home, an asphalt-shingle replacement runs about $5,500–$12,000 installed, or roughly $4.50–$11 per square foot. Premium materials multiply that several times over. These are 2026 planning figures and vary widely by region, roof complexity and local labor rates.
On a finished re-roof, labor and disposal usually make up about 60% of the bill and materials about 40%, so the price is far more sensitive to how hard your roof is to walk and detail than to the shingle brand on the truck. Steep pitches, multiple tear-off layers, and complex roofs with dormers, valleys, skylights and chimneys all add labor and push you toward the high end.
The roof replacement cost formula
Every estimate starts from the same chain. You convert the footprint your roof covers into the real sloped area, divide by 100 to get squares, then apply an installed per-square (or per-sq-ft) rate and add tear-off:
sloped area = footprint area × slope factor · squares = sloped area ÷ 100 · cost = sloped area × installed $/sq ft (+ tear-off $/sq ft)
The slope factor is the multiplier that turns the flat footprint you can measure on the ground into the steeper surface a roofer actually shingles. A 4:12 roof has a slope factor of about 1.054, a 6:12 about 1.118, an 8:12 about 1.202, and a 12:12 about 1.414. If you don't know your pitch, the roof pitch calculator gets it from a simple rise-and-run measurement and gives you the exact factor.
Worked example: a 2,000 sq ft footprint, 6:12 pitch, asphalt
Say your home's roof footprint is 2,000 sq ft and the pitch is 6:12 (slope factor 1.118):
- Sloped area: 2,000 sq ft × 1.118 = 2,236 sq ft
- Squares: 2,236 ÷ 100 = 22.4 squares
- Material + install at $7.50/sq ft (mid-range architectural asphalt): 2,236 × $7.50 = $16,770 — or, more conservatively at $5.50/sq ft, about $12,300
- Tear-off of one layer at $1.25/sq ft: 2,236 × $1.25 = $2,795
- Estimated total: roughly $12,300–$19,600 depending on shingle grade and region
That spread is normal — it is why you collect three quotes rather than trusting one number. The widget above runs this same math for your size, pitch, material and tear-off choice and returns a low-to-high band with the cost per square broken out.
New roof cost by material (2026 estimates)
Material sets the floor on price and the ceiling on lifespan. The installed ranges below bundle shingles, underlayment, flashing, fasteners and labor — the all-in number, not just the material on the pallet.
| Material | Installed $/sq ft | Per square (100 sq ft) | Typical life |
|---|---|---|---|
| Asphalt shingle | $4.50 – $11 | $450 – $1,100 | 15–30 years |
| Flat / low-slope membrane | $5 – $12 | $500 – $1,200 | 15–30 years |
| Cedar shake | $7 – $14 | $700 – $1,400 | 25–40 years |
| Metal (standing seam) | $9 – $16 | $900 – $1,600 | 40–70 years |
| Clay or concrete tile | $12 – $25 | $1,200 – $2,500 | 50+ years |
| Natural slate | $15 – $30 | $1,500 – $3,000 | 75–100+ years |
Figures are 2026 national planning estimates and vary by region, roof complexity and supplier; copper and other specialty metals run well above the standing-seam range.
Cost by roof size
Once you know your sloped area, asphalt-shingle replacement scales roughly with it. The table shows typical installed totals for asphalt, including a standard one-layer tear-off; premium materials run two to four times higher.
| Roof size (sloped) | Squares | Asphalt total (installed) |
|---|---|---|
| 1,000 sq ft | 10 | $4,500 – $11,000 |
| 1,500 sq ft | 15 | $6,800 – $16,500 |
| 2,000 sq ft | 20 | $9,000 – $22,000 |
| 2,500 sq ft | 25 | $11,300 – $27,500 |
| 3,000 sq ft | 30 | $13,500 – $33,000 |
Remember these are sloped areas. A 2,000 sq ft footprint at a 6:12 pitch is about 2,236 sloped sq ft, so it lands a step higher than the 2,000-row above. To size the actual material list — squares, bundles, underlayment and nails — use the roofing material calculator.
Tear-off and the line items that add up
The headline per-square rate hides several add-ons that show up on a real quote. Knowing them helps you read a bid and spot what a lowball estimate left out.
| Line item | Typical cost | Notes |
|---|---|---|
| Tear-off & disposal (1 layer) | $1 – $2 / sq ft | $100–$200 per square; more for tile or multiple layers |
| Deck / sheathing repair | $2.20 – $3 / sq ft | Only for rotted or soft sections found after tear-off |
| Underlayment | $0.15 – $2 / sq ft | Synthetic vs. felt; usually folded into the per-square rate |
| Ice-and-water shield | $1 – $2 / sq ft (eaves/valleys) | Code-required in cold climates along eaves and valleys |
| Drip edge & flashing | $2 – $4 / linear ft | Around chimneys, walls, skylights and edges |
| Permit | $100 – $500 | Varies by municipality; often pulled by the contractor |
Going over the existing shingles (a "roof-over") skips tear-off and saves roughly $1–$2 per sq ft, but most building codes allow only one extra layer, it hides deck rot, and it shortens the new roof's life — so it is generally a short-term fix, not a true replacement.
Waste factor: order a little over
Roofing is cut to fit, so you always buy more than the bare sloped area. A simple gable roof needs about 10% extra for cuts, starter course and ridge caps; a complex roof with several hips, valleys and dormers can need 15% or more. Cost calculators bake this into the rate, but if you are pricing materials directly, add the allowance before you multiply — a short delivery mid-job costs far more than a few leftover bundles.
Common mistakes when estimating a new roof
- Pricing the footprint, not the sloped area. Skipping the slope factor underestimates a steep roof by 10–40%. Always multiply by the pitch factor first.
- Forgetting tear-off and disposal. On a re-roof this is $100–$200 per square — a real, separate line, not part of the shingle price.
- Ignoring deck repair. Rotted sheathing is only found after the old roof is off; budget a contingency so a surprise doesn't blow your number.
- Comparing bids on price alone. A cheap quote may use 15-year 3-tab shingles and felt; a higher one may include synthetic underlayment, ice shield and a workmanship warranty. Compare the scope, not just the total.
- Treating an online estimate as a quote. Calculators give a planning range; only an on-roof inspection produces a binding price.
When to hire a pro
A full roof replacement is rarely a DIY job. Steep-slope work, tear-off of a whole roof, proper flashing and ice-shield detailing, and safe disposal all require fall protection, crew labor and code knowledge — and a botched roof leaks where you can't see it until the deck is wet. Hire a licensed, insured roofer when: your roof is above about 6:12 (where most people need roof jacks or a harness, per the pitch guide), there are multiple existing layers, the deck shows soft spots or sagging, or a manufacturer warranty requires certified installation. DIY makes more sense for a small, low-slope shed or a single-section repair. Either way, get at least three written quotes and confirm the contractor's license, insurance and warranty terms before signing.
These are 2026 planning estimates only and vary by region, roof complexity, material grade and labor market — verify with a local roofer or supplier before you budget. Sources for cost ranges include NerdWallet's 2026 roof-replacement guide and Calculator.net's slope-correction data; figures here are rounded for planning.
Prices vary by location. Verify with local suppliers.
How much does a new roof cost?
A new roof is priced by the square (100 sq ft) and driven by four things: your roof size, its pitch, the material you choose, and whether the old roof gets torn off. For a typical home, an asphalt-shingle roof runs about $5,500–$12,000 installed, or roughly $4.50–$11 per square foot. Premium materials cost more — metal, tile and slate can multiply the price several times over.
cost = roof area × material rate (× complexity) + tear-off · roof area = footprint × slope factor
The estimate above splits the midpoint into roughly 40% materials and 60% labor and disposal, which is typical for a re-roof. Steep pitches, multiple tear-off layers, and complex roofs with dormers, valleys and skylights all add labor and push the figure toward the high end.
New roof cost by material
| Material | Installed $/sq ft | Typical life |
|---|---|---|
| Asphalt Shingle | $4.50 – $11 | 15–30 years |
| Metal | $9 – $16 | 40–70 years |
| Tile | $12 – $25 | 50+ years |
| Slate | $15 – $30 | 75–100+ years |
| Flat / Low-Slope | $5 – $12 | 15–30 years |
| Cedar Shake | $7 – $14 | 25–40 years |
Use these ranges as a planning guide, then get matched with local roofers to compare real quotes. To size the materials for a DIY job instead, the roofing material calculator gives you squares, bundles and a shopping list, and the roof pitch calculator gets your slope factor if you don't know your pitch.
Frequently asked questions
How do I estimate roof replacement cost from my house size?
Start with the footprint area the roof covers, then multiply by the slope factor for your pitch to get the true sloped area — a 2,000 sq ft footprint at 6:12 (factor 1.118) is about 2,236 sloped sq ft. Multiply that by an installed rate of about $4.50–$11 per sq ft for asphalt, then add tear-off at roughly $1–$2 per sq ft. For the 2,236 sq ft example, that's about $12,000–$19,000 installed. The calculator above runs this exact chain for your inputs.
What is the labor cost to replace a roof?
On a finished asphalt re-roof, labor and disposal usually account for about 60% of the total — materials are the other 40%. With roofing crews billing roughly $40–$90 per hour and a standard home taking one to three days, labor on a typical replacement often runs $4,000–$10,000. Steep pitch, multiple tear-off layers and complex roofs raise the labor share because the work is slower and needs fall protection.
Is replacing a roof cheaper in the off-season?
Often, yes. Spring and fall are peak roofing season, so crews are booked and quotes run higher. Late fall and winter are slower in many regions, and contractors may discount to keep crews working — though cold weather can limit which days shingles seal properly. If your roof isn't an emergency, getting quotes in the off-season can shave a meaningful amount off the price.
Will my homeowners insurance pay for a new roof?
Insurance generally covers roof replacement when the damage comes from a sudden covered peril — a storm, hail, fallen tree or fire — minus your deductible, and often pro-rated for the roof's age on older policies. It typically will not pay to replace a roof that has simply worn out from age or lack of maintenance. Document storm damage with photos and get a contractor's inspection before filing a claim.
How often does a roof need to be replaced?
It depends on the material. Asphalt shingles last about 15–30 years, cedar shake 25–40, metal 40–70, tile 50-plus, and natural slate 75–100 years or more. Watch for curling or missing shingles, granules in the gutters, daylight in the attic or repeated leaks — those signs mean it's time to budget, regardless of the calendar. Use the material table above to match expected life against replacement cost.
How much does a new roof cost?
For a typical single-family home, a new asphalt-shingle roof usually runs about $5,500 to $12,000 installed, or roughly $4.50 to $11 per square foot depending on size, pitch, tear-off and region. Premium materials cost more: metal often $9–$16 per sq ft, and tile or slate $12–$30+ per sq ft. Enter your roof size and material above for a low-to-high estimate.
How much does a new roof cost per square?
Roofers price by the square (100 sq ft). Installed asphalt shingles commonly run about $450–$1,100 per square, standing-seam metal $900–$1,600, and tile or slate $1,200–$3,000+. The per-square figure bundles materials, labor, underlayment, flashing and disposal — this calculator shows your estimated cost per square based on the inputs.
Does the price include tearing off the old roof?
Tear-off and disposal of the existing roof typically adds about $1–$2 per square foot, or $100–$200 per square. Going over the existing layer (a roof-over) saves that cost but is only allowed for one extra layer and is generally a short-term fix. The calculator lets you toggle tear-off on or off so you can see the difference.
What makes a roof cost more?
The biggest cost drivers are roof size, pitch (steep roofs are slower and need fall protection), the material you choose, the number of layers to tear off, and complexity — hips, valleys, dormers, skylights and chimneys all add labor. Local labor rates and permit fees also vary widely by region. The estimate here covers a standard job; unusual features can push it higher.
How long does a roof replacement take?
A standard asphalt-shingle roof on an average home is usually a one-to-three-day job for a full crew. Larger, steeper or more complex roofs, or premium materials like tile and slate, take longer. Weather, tear-off of multiple layers and any deck repairs can extend the timeline.