Roofing Calculator Metric (m) Imperial (ft) Calculation method Enter roof dimensions Enter plan area directly Roof length (m) — ridge Horizontal span (m) — eave to ridge Roof sections 1 — Lean-to / mono-pitch 2 — Gable roof 4 — Hip roof Plan area / footprint (m²) Roof pitch Flat (0°) 15° 22° 30° 45° Custom angle: ° Roofing material Concrete Tiles Clay Tiles Metal Sheeting (corrugated / Colorbond) Asphalt Shingles Flat Membrane / Felt Roof Paint / Coating Tile format Standard interlocking (10.2 tiles/m²) Large format tile (9 tiles/m²) Small plain tile (13 tiles/m²) Sheet length 1.8 m 2.4 m 3.0 m 3.6 m 4.2 m 4.8 m 6.0 m Number of coats 1 coat 2 coats Coverage (m² per litre) Calculate Roofing 🏠 Roof Estimate — Plan area (footprint) — Pitch factor — Actual roof area — Est. material weight Material needed
