Roofing
Roofing Squares Calculator
Your measurements : area. Your estimate : roofing squares.
How the calculation works
Roofing Squares Calculator
Area × (1 + Waste allowance / 100) ÷ 9.290304 m²; 100 ft² = 9.290304 m²Before you order
- A simple roof with one uniform pitch is assumed. Length and width are horizontal plan dimensions; overhang is horizontal on every side. Valleys, hips, dormers and overlaps need separate allowances.
- Planning estimate only. This is not a structural design, a safety approval or a local code check.
Worked example
- Area
- 20 m²
- Waste allowance
- 10 %
Roofing squares 2.37 square