Roofing Calculator Free Online brings you the ease of estimating the area of your roof, as well as how much roofing material you will need to construct a roof of given area. These calculations are estimated based on averages and you need to consult with a professional roofer or roofing company in your area before considering any roofing estimate as final. Also use roof cost calculator for estimating the cost of a roof.
Roofing Area Calculator
Roof Material Calculator
Roofing Cost Calculator
Estimate your roofing project costs in minutes
Enter your details to see cost estimate
When a roof has a complex shape, it is essential measure the dimensions and areas of each part of the gable or shed roof to calculate total area of your area with more accurate measurement. Our free roofing calculator cannot exactly estimate for such complex shapes based on the measurement of square footage. You can also use any area calculator to calculate the area of various simple shapes that make up the total area of a commercial or residential roof. When you use the aggregate area of these simple or complex shapes of a roof, our Roofing Area Calculator shows more accurate roof area that you can later use with Roofing Material Calculator.
In United States, most common roofing materials are shingles, membrane roofing and ceramic tile, all of which may have different ages. Some may last longer than others. On average, shingle roofs have a life span of 13 to 32 years, whereas membrane roofs may last around a decade. Ceramic tile roofs are generally expensive roofs in USA and they have an average life span of over 100 years. Using our Roof Area Calculator tool, you will never say again "how do I calculate roof area".
What is Roof Pitch?
When it's about a roofing replacement or roofing installation project, a roof pitch is something you will hear about. When you divide a roof's vertical rise by its horizontal run, the result is known as Roof Pitch. Usually, compared with slope, but roof pitch is not exactly the same. In the United States, roof pitch is measured using a 12-inch horizontal run (1 foot), with the pitch expressed as the vertical rise over those 12 inches. For example, a 7/12 roof pitch indicates the roof rises 7 inches for every 12 inches of horizontal distance. In contrast, outside the U.S., roof pitch is usually described using the angle in degrees. Roof pitch determines how much roofing will cost, as well as roof area and types of roofing materials also play a role. It matters for walkability, drainage, and roofs.
Roof pitch can impact what actual area of a roof is. To use in Roofing Material Calculator, you need to multiply the horizontal area by a correction factor corresponding to pitch via taking help from the below table. It's easy, fun and free to estimate the amount of necessary materials. Generally, you may find it difficult to measure the area and pitch of each part of your roof, but multiplying by the correction factor can give you more possible accurate result. Actually, Roofing Calculator Free Online has 3 roof calculators that perform the functions like roofing waste calculator, TPO roofing cost calculator, roof replacement cost calculator, metal roofing cost and material calculator, roofing labor cost per square calculator, and roofing square calculator.
| Roof Pitch (slope) | Roof Angle (degrees) | Slope Factor (multiplier) | Valley & Hip Factor (multiplier) |
|---|---|---|---|
| 1:12 | 4.76° | 1.0035 | 1.4167 |
| 2:12 | 9.46° | 1.0138 | 1.4240 |
| 3:12 | 14.04° | 1.0308 | 1.4362 |
| 4:12 | 18.43° | 1.0541 | 1.4530 |
| 5:12 | 22.62° | 1.0833 | 1.4743 |
| 6:12 | 26.57° | 1.1180 | 1.5000 |
| 7:12 | 30.26° | 1.1577 | 1.5298 |
| 8:12 | 33.69° | 1.2019 | 1.5635 |
| 9:12 | 36.87° | 1.2500 | 1.6008 |
| 10:12 | 39.81° | 1.3017 | 1.6415 |
| 11:12 | 42.51° | 1.3566 | 1.6853 |
| 12:12 | 45.00° | 1.4142 | 1.7320 |
How much does roof replacement cost?
See the below table for easy understanding for how much will it cost you if you replace your roof by type and per square foot. In table below, you can see roof replacement cost ranges along with cost per square of materials. One roofing square equals 100 square feet. Instead, you can also try our roofing cost estimator above to see roofing services prices in your specific case.
| Roofing Material | Average Cost per Sq. Ft. | Average Total Replacement Cost* | Typical Lifespan (Years) | Key Benefits |
|---|---|---|---|---|
| Asphalt Shingles | $3.40 – $5.95 | $5,840 – $10,100 | 15 – 30 | Affordable, easy to install, widely available |
| Metal Roofing | $6.00 – $24.50 | $10,245 – $41,640 | 40 – 70 | Durable, low maintenance, energy-efficient |
| Tile Roofing (Clay/Concrete) | $6.30 – $20.00 | $10,665 – $34,000 | 50 – 100 | Fire-resistant, long-lasting, aesthetically appealing |
| Wooden Shakes / Shingles | $6.00 – $15.00 | $10,230 – $25,500 | 25 – 50 | Natural look, good insulation, eco-friendly |
| Slate Roofing | $10.00 – $31.77 | $17,000 – $54,020 | 60 – 150 | Extremely durable, elegant, fire-resistant |
| Copper Roofing | $15.00 – $30.00 | $25,500 – $51,000 | 70+ | Very long-lasting, corrosion-resistant, premium look |
| Zinc Roofing | $6.00 – $12.00 | $10,200 – $20,400 | 100+ | Long lifespan, self-healing properties, eco-friendly |
| Composite Roofing | $7.75 – $15.50 | $13,175 – $26,350 | 15 – 50 | Versatile styles, durable, often made from recycled materials |
| Rubber Roofing (EPDM) | $3.00 – $14.00 | $5,100 – $23,800 | 30 – 50 | Affordable, durable for flat/low-slope roofs, eco-friendly |
| Green Roofing (Vegetated) | $10.00 – $25.00 | $17,000 – $42,500 | 30+ | Sustainable, energy-efficient, aesthetic, requires specialized installation |
Asphalt Shingles
To replace asphalt shingles, you will need to bear a cost of anywhere between $4400 to $1100. 3-tab shinges cost an average of $4 per square foot in USA.
Metal Roofing
For metal roofing cost calculation, your estimate should be between $10000 to $45000 to replace your old roof with a new metal roof. Standing seam metal roofing materials cost anywhere from $18 to $25 per square foot
Tile Roofing
You can expect to pay between $9,665 and $19000 to replace a tile roof. Concrete tiles cost between $5.28 and $7.43 per square foot while Clay tiles cost between $9 and $12 per square foot.
Wooden Shakes and Shingles
In comparison with other roofing materials, this can be a bit affordable, costing around $9000 to $14500 for a wooden roof replacement.
Slate Roofs
You can prepare yourself to spend between $39,915 and $54,030 for slate roof replacement cost.
Roof Replacement Labor Costs
In USA, the labor cost for roof replacement is around 57% of the total cost for replacing a roof, no matter what type and material. Each roofing contractor or a roofing company may have a different pricing structure, affecting roof replacement labor cost as well.
Roof Replacement Costs by House Sizes in USA
| House Size (Square Feet) | Typical Roof Area (Sq. Ft.)* | Average Roof Installation Cost Range** | Average Roof Replacement Cost Range** |
|---|---|---|---|
| 1,200 | 1,500 | $6,000 – $9,000 | $4,200 – $7,200 |
| 1,600 | 2,000 | $8,000 – $12,000 | $5,600 – $9,600 |
| 2,000 | 2,500 | $10,000 – $15,000 | $7,000 – $12,000 |
| 2,233 (Median US home) | 2,791 | $11,164 – $16,746 | $7,815 – $13,397 |
| 2,500 | 3,125 | $12,500 – $18,750 | $8,750 – $15,000 |
| 3,000 | 3,750 | $15,000 – $22,500 | $10,500 – $18,000 |
| 3,500 | 4,375 | $17,500 – $26,250 | $12,250 – $21,000 |
Country Wise Roofing Service Average Costs
| Country | Roofing Installation Cost (per sq. ft.) | Roofing Repair Cost (per sq. ft.) | Roofing Replacement Cost (per sq. ft.) | Notes / Key Factors |
|---|---|---|---|---|
| United States | $4.00 – $7.50 | $3.00 – $6.00 | $5.40 – $19.80 | Wide range due to material choice, labor, roof complexity |
| Canada | CAD 5.00 – 10.00 | CAD 4.00 – 8.00 | CAD 6.00 – 15.00 | Costs higher in remote areas; cold climate affects materials |
| United Kingdom | £40 – £70 per sq. m | £30 – £60 per sq. m | £50 – £100 per sq. m | Labor intensive; older housing stock increases repair needs |
| Australia | AUD 40 – 80 per sq. m | AUD 30 – 70 per sq. m | AUD 50 – 110 per sq. m | High UV exposure affects material durability |
| Germany | €40 – 80 per sq. m | €30 – 60 per sq. m | €50 – 120 per sq. m | Strict building codes; high labor costs |
| France | €35 – 75 per sq. m | €25 – 55 per sq. m | €45 – 110 per sq. m | Regional variations; slate roofing common in some areas |
| Japan | ¥500 – 1,200 per sq. ft. | ¥400 – 900 per sq. ft. | ¥600 – 1,500 per sq. ft. | High seismic standards; premium materials common |
| South Korea | ₩5,000 – 12,000 per sq. ft. | ₩4,000 – 9,000 per sq. ft. | ₩6,000 – 15,000 per sq. ft. | Urban density impacts labor costs |
| United Arab Emirates | AED 40 – 90 per sq. ft. | AED 30 – 70 per sq. ft. | AED 50 – 120 per sq. ft. | Extreme heat requires specialized materials |
| Switzerland | CHF 50 – 100 per sq. m | CHF 40 – 80 per sq. m | CHF 60 – 130 per sq. m | High labor costs; premium materials common |
Signs You Need Roofing Replacement or Installation Service
- Light shining through your attic, indicating holes or gaps in the roof structure.
- Shingles that are curling, buckling, or cracking, which compromises the roof’s protective layer.
- Missing shingles exposing the underlying roof deck to water damage.
- Bald spots on shingles where granules have worn off, reducing waterproofing.
- Visible water stains or leaks inside the home, especially in the attic or ceilings.
- Moss, algae, or other vegetation growing on the roof, which can trap moisture and cause damage.
- Valleys in the roof that are sagging or weakened by water accumulation, increasing risk of collapse.
- Deteriorated or damaged flashing around chimneys, vents, or skylights leading to leaks.
- Sagging rooflines or uneven roof ridges indicating structural issues requiring replacement.
- Damage from severe weather events such as hail, wind, or fallen trees causing visible roof covering damage.
Roofing Related Topics:
Types of roofing, roofing companies, DIY Roofing, Roofing Tips, Decking, Underlayment, Fascia and soffit replacement, Ice and water barrier, pipe boots, damaged roof flashing, roof leaks, roof scuffing and scratching, and faulty roofing materials, damaged or missing shingles and common roofing problems.
FAQs
Can roofing shingles calculator give an exact price for installation or repairs?
Our free roofing service cost calculator may not give exact price that any roofing company may quote you because there might be small miscalculations or the area you live in may have different roofing service pricings than average costs for roofing service.
Is this a roofing pitch calculator?
No, this does not work like that. You will need to calculate height and width of your roofing system to calculate the accurate area of your roof, no matter what style or size.
What is a Roofing Costs Calculator?
A roofing costs calculator is an online tool that gives you an estimated roofing installation, roofing repair, and roofing replacement service pricing.
How much roofing do I need calculator?
Use our free online roofing calculator to see how much roofing you need.