Roof Calculator
Estimate roof surface area, pitch multiplier, roofing squares, shingle bundles, underlayment, ridge caps and material cost.
Hit Calculate to see your result
Set pitch and waste to calculate
Metrics appear after calculation
Your explanation appears here
Roof shape, valleys, dormers, penetrations and local product coverage can change the final order.
Your plan appears after calculation
Test a different pitch and waste allowance without changing your main inputs.
Calculate your roof baseline first
It multiplies the building footprint by a pitch factor based on rise over 12, then adds your selected waste allowance and rounds roofing materials up to purchasable units.
A roofing square is 100 square feet of roof surface. In metric mode, the calculator still converts to roofing squares for common shingle estimating.
Simple roofs often use about 5–10% waste, while hip roofs, valleys, dormers, steep pitches or patterned installation may need 12–20% or more. Always verify with your roofer or supplier.
Results are local browser estimates for planning purposes only, not supplier, structural, code, safety or professional roofing advice. Verify measurements, pitch, slope, roof penetrations, local code, ventilation, flashing, product coverage and installation requirements before buying or building. VisionVix accepts no liability for decisions based on this output.