Enter your roof area in square feet (one roofing square = 100 sq. ft., so 20 squares = 2,000 sq. ft.), pick a material, and adjust for pitch, stories and the number of old layers to remove. The result is a price range based on published 2026 cost-guide data, not a quote.
Don't know your roof size? Multiply your home's floor area by about 1.1–1.2 for a moderate pitch, or check a past estimate or aerial measurement report. For full price tables by material, size and pitch, see our roof replacement cost guide; for a specific material, read the shingle roof replacement or metal roof replacement guides.
Calculator
Typical results
For reference, these are typical totals for a 20-square (2,000 sq. ft.) single-story roof with one layer removed, average-cost area:
| Scenario | Typical range | Notes |
|---|---|---|
| Architectural asphalt shingles | $8,000–$14,000 | Most common choice; national averages near $9,600–$10,800 |
| Standing-seam metal | $18,000–$32,000 | Steel panels; aluminum, zinc and copper cost more |
| Concrete or clay tile | $20,000–$40,000 | Heavier roof; structure may need checking |
What goes into the estimate
- Roof size in squares. Roofers price by the square (100 sq. ft. of roof surface), not by your home's floor area. A 1,750 sq. ft. house typically has about 2,000 sq. ft. (20 squares) of roof on a moderate pitch.
- Pitch. Roofs steeper than about 8:12 need harnesses, roof jacks and slower work. The calculator adds 8% for moderately steep roofs, 20% for steep and 30% for very steep or complex ones, in line with the 15–25% (and up to 30%) premiums reported for steep roofs.
- Material. Installed prices per sq. ft. come from the national ranges in our pillar guide: asphalt $3–$7, metal $5–$16, tile $10–$20 and slate $15–$30.
- Tear-off layers. The base prices assume one layer of old roofing is removed. A second layer adds roughly $1–$2 per sq. ft., which the calculator models as +15%; an overlay skips that cost (−15%) but is only allowed by some codes.
- Region. A regional selector adjusts the result from 0.85 (lower-cost rural areas) to 1.35 (the most expensive metros), because labor makes up most of a roofing bill.
How we built the ranges
Installed unit prices come from published 2026 data: Angi (updated March 2026), HomeAdvisor (updated June 2026), HomeGuide's roof replacement, metal roof and flat roof guides, and Fixr (updated February 2026), and match the ranges in our roof replacement cost guide. Tear-off pricing ($1–$2 per sq. ft. for an extra layer) and steep-roof premiums (15–25%, up to 30%) come from RoofingCalc and Roofing Observations. The exact pitch, story and layer multipliers, and the minimum job charge, are WhatHomeCosts estimates that apply those reported ranges.
The calculator does not include structural repairs or truss work ($5–$14 per sq. ft. where needed), full deck replacement ($2–$5 per sq. ft.), gutters, skylights, chimney rebuilding or insulation upgrades. Real quotes depend on an on-site inspection, local codes and the product line you choose.
FAQ
How do I measure my roof in squares?
Multiply your home's floor area (including the garage if it shares the roof) by about 1.1–1.2, then divide by 100. A 1,800 sq. ft. home with a garage under the same roof often has 22–25 squares; steep roofs have more.
Is the calculator result a quote?
No. It is a budgeting range to help you check whether bids are reasonable. Get at least three written quotes based on an on-site inspection.
This tool gives a rough estimate only. Get at least three written quotes for your project.
For a full breakdown of prices, read our complete roof replacement cost guide.
Sources
- Angi — How Much Does Roof Replacement Cost? [2026 Data] (updated Mar 5, 2026). Checked October 8, 2026.
- HomeAdvisor — How Much Does Roof Replacement Cost? (updated Jun 17, 2026). Checked October 8, 2026.
- HomeGuide — How Much Does a Roof Replacement Cost? (2026) (Nov 7, 2025). Checked October 8, 2026.
- HomeGuide — How Much Does a Metal Roof Cost? (2026) (Nov 21, 2025). Checked October 8, 2026.
- Fixr — How Much Does a Roof Replacement Cost in 2026? (updated Feb 4, 2026). Checked October 8, 2026.
- RoofingCalc — Average Cost to Tear Off & Replace a Roof of Any Size in the US (updated Mar 31, 2025). Checked October 8, 2026.
- Roofing Observations — Roof Replacement Cost Guide: 2026 Average Prices (updated Jan 7, 2026). Checked October 8, 2026.
Prices are estimates and vary by location and provider. See our methodology and editorial policy. Browse all tools & calculators cost guides.