WheelbarrowMath

Roof Cost Calculator

Estimate what a new asphalt shingle roof costs, including tear-off, from your house's size and pitch.

House footprint
  1. Area 1
    ft
    ft

For an odd shape, split it into rectangles, circles, and triangles; they're added together.

in

How far the eaves stick out past the walls.

A 6/12 roof rises 6 in for every 12 in across. If you're not sure, use the roof pitch calculator.A 6/12 roof rises 50 cm for every 1 m across. If you're not sure, use the roof pitch calculator.

Roof shape
%

GAF says contractors typically add 10–15%, more for hips, valleys, and dormers.

Most asphalt shingles are 3 bundles per 100 sq ft. Some heavy designer shingles need 4 or 5.Most asphalt shingles take 3 bundles to cover 9.29 m². Some heavy designer shingles need 4 or 5.

sq ft

Check the roll label; coverage varies a lot by product.

Prices (typical US prices; edit for your area)
Shingles
/square

About $80–$130 a square for 3-tab and $100–$250 for architectural.About $8.60–$14 a m² for 3-tab and $10.80–$26.90 for architectural.

/square

Typically $150–$300 a square.Typically $16–$32 a m².

/sq ft

It's $1–$5 a sq ft; shingle roofs are at the low end. Set 0 for new construction.It's $11–$54 a m²; shingle roofs are at the low end. Set 0 for new construction.

Your Results

Calculating …

What a New Roof Costs

HomeGuide gives these costs for roof replacement:

Typical cost
3-tab shingles$80–$130 a square
Architectural shingles$100–$250 a square
Labor$150–$300 a square
Tear-off$1–$5 a sq ft (shingles at the low end)
Asphalt shingle roof, installed$3–$6 a sq ft of roof

A square is 100 sq ft of roof surface, not of floor space. A steeper roof has more of it.

Worked example. A 50 × 40 ft house with 1 ft overhangs and a 6/12 roof has about 2,442 sq ft of roof. With 10% waste that’s 26.9 squares:

Cost
Architectural shingles, 26.9 squares at $175$4,700
Labor, 26.9 squares at $200$5,372
Tear-off, 2,442 sq ft at $1$2,442
Total$12,514 ($5.12 a sq ft of roof)

What Drives the Price

  • Pitch. A steeper pitch means more surface to cover, and steep roofs are slower to work on.
  • Complexity. Hips, valleys, dormers, and skylights mean more cutting, flashing, and waste.
  • Layers to remove. Tearing off more than one layer, or heavy materials, costs more.
  • Decking repairs. Rotten sheathing found during tear-off is extra.
  • Material. Architectural shingles cost more than 3-tab but last longer; metal, tile, and slate cost much more.

Getting Quotes

Use this estimate to sanity-check quotes, not replace them. Ask each roofer for the number of squares they’re pricing, what’s included (underlayment, ice-and-water shield, drip edge, ridge vent, flashing), how decking repairs are charged, and the warranty. The roofing calculator shows the squares and bundles behind this estimate.

Frequently Asked Questions

How Much Does a New Roof Cost?

HomeGuide puts asphalt shingle roofs at about $3–$6 per sq ft of roof installed. For a 2,000 sq ft house with about 2,235 sq ft of roof, that’s roughly $6,700–$13,400.

How Much Does a Roof Cost per Square?

Shingles themselves run about $80–$130 a square for 3-tab and $100–$250 for architectural, and labor $150–$300 a square, per HomeGuide. Tear-off adds $1–$5 a sq ft.

Does a Steeper Roof Cost More?

Yes. A steeper roof has more surface over the same house, and it’s slower and more dangerous to work on, so many roofers charge more for steep pitches.

Sources

Prices are national ballparks checked October 2026. Local prices vary.