Free calculator
Roof Cost Calculator
Free Roof Cost Calculator with instant browser-based results and a clear calculation breakdown.
🏠 Roof Cost Calculator
Calculate the estimated cost to replace or install a new roof. Enter your roof dimensions, select materials, and include any additional features to get a comprehensive cost estimate.
Length of the roof surface
Please enter a valid length greater than 0
Width of the roof surface
Please enter a valid width greater than 0
Steeper roofs require more material and labor
Cost per square foot installed
Removal cost: $1.50/sq ft per layer
Chimneys, skylights, valleys, etc.
Additional cost per square foot
Extended warranty coverage
Estimated Total Roof Cost:
$0
Roof Area:
0 sq ft
Material & Installation:
$0
Tear-off & Disposal:
$0
Underlayment:
$0
Complexity Adjustment:
$0
Warranty Package:
$0
Total Estimated Cost:
$0
How this is calculated:
1. Roof Area = Length × Width × Pitch Factor (accounts for slope)
2. Material Cost = Roof Area × Material Price per sq ft
3. Removal Cost = Roof Area × $1.50 × Number of Layers
4. Underlayment = Roof Area × Underlayment Cost per sq ft
5. Complexity = (Material + Removal + Underlayment) × (Complexity Factor - 1)
6. Total = Sum of all costs + Warranty
Note: This is an estimate only. Actual costs vary by location, contractor, season, and specific site conditions. Always obtain multiple quotes from licensed contractors.
1. Roof Area = Length × Width × Pitch Factor (accounts for slope)
2. Material Cost = Roof Area × Material Price per sq ft
3. Removal Cost = Roof Area × $1.50 × Number of Layers
4. Underlayment = Roof Area × Underlayment Cost per sq ft
5. Complexity = (Material + Removal + Underlayment) × (Complexity Factor - 1)
6. Total = Sum of all costs + Warranty
Note: This is an estimate only. Actual costs vary by location, contractor, season, and specific site conditions. Always obtain multiple quotes from licensed contractors.
Want to understand the calculation?
Read the guideSee examples, formula notes and limitations.