Roofing Calculator
Roofing Calculator estimates material quantities and costs for roof replacement projects, helping homeowners and contractors plan budgets accurately.
Roofing Material Calculator
House Dimensions
Roof Specs
Estimating
* A standard "Square" is 100 sq ft, which requires 3 bundles of asphalt shingles.
Total Roof Area
Roofing Squares
100 sq.ft per square
Shingle Bundles
3 bundles per square
Estimated Material Cost
Estimating Roofing Materials
Roofing materials are typically measured and sold by the "Square". One roofing square equals 100 square feet of roof area.
For standard 3-tab or architectural asphalt shingles, it usually takes 3 bundles to cover one square (100 sq ft).
Understanding Roof Pitch
The "pitch" is the slope of your roof, expressed as a ratio of rise over run. A "6/12" pitch means the roof rises 6 inches for every 12 inches of horizontal run. The steeper the pitch, the greater the actual surface area of the roof compared to the flat footprint of the house.