Cost estimate · Roofing
Roofing Cost Calculator
Free roofing calculator for square feet and squares — asphalt, metal, cedar, or tile. Get a low / typical / high installed range with tear-off, underlayment, and steep-pitch uplift. No signup.
Roof details
Estimated roofing cost
$13,018–$22,855
Typical ~$17,937 · $6–$11/sq ft roof
- Roof area
- 2,012 sq ft
- Squares (raw)
- 20.1
- With waste
- 22.1 sq
Pitch 6/12 · 26.6° · area multiplier ×1.118
Cost breakdown
- Architectural asphalt shingle (installed)22.1 squares × $450–$750/sq$9,961–$16,602
- Tear-off (1 layer)20.1 sq × 1 × $100–$200$2,012–$4,025
- Underlayment22.1 squares × $30–$60$664–$1,328
- Ridge & starter40 lf × $2–$5/lf$80–$200
- Disposalper job$300–$700
Not included
- Structural repairs, sheathing replacement, and dry rot
- Gutters, skylights, and solar work
- Permit fees and HOA requirements
- Asbestos / specialty tear-off handling
Price data updated . National US ranges from published supplier and contractor averages. Not a bid. Local quotes vary.
How this roofing calculator works
Footprint alone understates roof area. Pitch stretches the surface; waste covers hips, valleys, and starter courses.
multiplier = √(1 + (rise ÷ 12)²) roof area = footprint_sq_ft × multiplier squares = roof area ÷ 100 order sq = squares × (1 + waste %) installed = order sq × $/square (by material) + tear-off, underlayment, ridge/starter, disposal + story uplift / steep-pitch uplift when applicable
Worked example. An 1,800 sq ft footprint at 6/12 (×1.118) is about 2012 sq ft of roof — 20.1 squares. With 10% waste you plan roughly 22.1 squares. Architectural shingles at $450–$750/square are only the install line — tear-off and disposal still stack on top.
Installed roofing cost per square (US)
One square = 100 sq ft of roof surface. Ranges are national planning figures, not local bids.
| Material | Installed $/square |
|---|---|
| 3-tab asphalt shingle | $350–$550 |
| Architectural asphalt shingle | $450–$750 |
| Metal, standing seam | $1,000–$1,800 |
| Cedar shake | $900–$1,500 |
| Tile, clay or concrete | $1,000–$2,000 |
| Tear-off (per layer) | $100–$200/square |
| Underlayment | $30–$60/square |
Pitch multipliers used in this calculator
Same multipliers as the roof pitch calculator, which also covers angle conversion and walkability.
| Pitch | Angle | Area × |
|---|---|---|
| 1/12 | 4.76° | 1.003 |
| 2/12 | 9.46° | 1.014 |
| 3/12 | 14.04° | 1.031 |
| 4/12 | 18.43° | 1.054 |
| 5/12 | 22.62° | 1.083 |
| 6/12 | 26.57° | 1.118 |
| 7/12 | 30.26° | 1.158 |
| 8/12 | 33.69° | 1.202 |
| 9/12 | 36.87° | 1.250 |
| 10/12 | 39.81° | 1.302 |
| 12/12 | 45.00° | 1.414 |
Roofing calculator FAQ
- Is this a free roofing calculator?
- Yes. No signup, no email gate, and it works on phones in the driveway. Enter footprint, pitch, and material to get a low / typical / high installed range in US dollars.
- How do I convert square feet to roofing squares?
- One roofing square is 100 square feet of roof surface. Multiply your building footprint by the pitch area multiplier, then divide by 100. A 1,800 sq ft footprint at 6/12 (×1.118) is about 2,012 sq ft of roof — roughly 20.1 squares before waste. Use the roofing square calculator for bundles and waste.
- Does the roofing cost calculator include tear-off?
- Yes when you select existing layers. Tear-off is priced per square per layer. New construction should use zero layers. Disposal is a separate job-level range.
- Why is steep pitch more expensive?
- Above about 8/12, crews need more staging, slower production, and higher safety overhead. This tool adds a 15–30% steep-pitch uplift on top of the running subtotal when pitch is steeper than 8/12.
- Is this a quote I can hire from?
- No. It is a planning estimate from national US installed ranges. Local labor, access, tear-off condition, and material grade move the number. Use the range to budget and compare bids.
- Can I use this as a roofing calculator app on my phone?
- Yes — it is a mobile-first web tool. Add it to your home screen if you want app-like access; there is nothing to install from an app store.
Need squares first — or a concrete pour?
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