Planning a new roof or repair? Our free online roofing calculator helps you accurately estimate materials like shingles, tiles, and metal, along with labor costs. Get a precise budget for your roofing project, whether it's an asphalt shingle, metal, or tile roof. Quickly calculate area, squares, and total expenses to save time and money.
Formula:
This calculator estimates the total cost of your roofing project based on roof dimensions, pitch, material costs, labor costs, and a waste factor.
- Roof Area (sq ft) = Roof Length (ft) × Roof Width (ft) × Pitch Multiplier
- Number of Roofing Squares = (Roof Area (sq ft) / 100) × (1 + Waste Factor Percentage)
- Estimated Material Cost = Number of Roofing Squares × Material Cost Per Square
- Estimated Labor Cost = Number of Roofing Squares × Labor Cost Per Square
- Grand Total Cost = Estimated Material Cost + Estimated Labor Cost
Variable Explanation:
- Roof Length: The length of the primary roof section in feet.
- Roof Width: The width of the primary roof section in feet.
- Pitch Multiplier: A factor accounting for the roof's slope. Higher pitches mean more surface area. (e.g., 1.0 for flat, 1.054 for 4/12 pitch, 1.118 for 6/12 pitch)
- Material Cost Per Square: The cost of roofing materials needed for one "square" (100 square feet) of roof.
- Labor Cost Per Square: The labor cost to install one "square" (100 square feet) of roofing.
- Waste Factor: An additional percentage (e.g., 10-15%) added to account for material waste during installation.