Flat or Very Low (1/12 – 3/12)
Standard Walkable (4/12 – 6/12)
Moderately Steep (7/12 – 9/12)
Very Steep / Non-Walkable (10/12+)
None (New Construction)
1 Layer of Shingles
2 Layers of Shingles
Estimated Replacement Cost
Estimated Range: $0.00
*Includes labor, materials, and disposal.
How to Estimate Your Roofing Costs
Replacing a roof is one of the most significant investments a homeowner will make. The cost varies wildly based on geographic location, local labor rates, and the specific materials chosen. Our calculator uses industry averages to provide a baseline for your budgeting needs.
Key Factors Affecting Roof Pricing
Square Footage: Roofing contractors measure in "squares." One square is a 10×10 foot area, or 100 square feet. A 2,500 sq. ft. roof equals 25 squares.
Material Choice: Asphalt shingles are the most affordable and common. However, metal and slate offer much longer lifespans (50-100 years) but come with a higher upfront price tag.
Pitch and Slope: Steeper roofs require more safety equipment, more specialized labor, and take longer to install, which increases the labor cost significantly.
Removal and Disposal: If your contractor needs to strip two layers of old shingles before installing the new roof, expect to pay more for labor and dump fees.
Example Calculation
If you have a 2,000 square foot roof with a standard pitch and you choose Architectural Shingles:
Material & Labor: 2,000 sq ft x $7.00 = $14,000
Pitch Adjustment: $14,000 x 1.15 = $16,100
Layer Removal: 2,000 sq ft x $1.50 = $3,000
Total Estimated Cost: $19,100
Maintenance Tips
To extend the life of your new roof, ensure your attic has proper ventilation. Excessive heat and moisture buildup in an attic can "bake" shingles from the inside out, causing premature grain loss and curling.
function calculateRoofCost() {
var area = document.getElementById('roofArea').value;
var materialPrice = document.getElementById('materialType').value;
var pitchMultiplier = document.getElementById('roofPitch').value;
var removalPrice = document.getElementById('removalLayers').value;
if (area === "" || area <= 0) {
alert("Please enter a valid roof area.");
return;
}
var areaNum = parseFloat(area);
var materialNum = parseFloat(materialPrice);
var pitchNum = parseFloat(pitchMultiplier);
var removalNum = parseFloat(removalPrice);
// Base calculation: (Area * Material Cost * Pitch Multiplier) + (Area * Removal Cost)
var baseCost = (areaNum * materialNum * pitchNum);
var removalCost = (areaNum * removalNum);
var totalCost = baseCost + removalCost;
// Create a range (plus or minus 10% for local variations)
var lowEnd = totalCost * 0.9;
var highEnd = totalCost * 1.1;
var formatter = new Intl.NumberFormat('en-US', {
style: 'currency',
currency: 'USD',
maximumFractionDigits: 0
});
document.getElementById('priceRange').innerHTML = formatter.format(lowEnd) + " – " + formatter.format(highEnd);
document.getElementById('roofResult').style.display = 'block';
// Smooth scroll to result
document.getElementById('roofResult').scrollIntoView({ behavior: 'smooth', block: 'nearest' });
}