Guides
Roofing guides
What people ask before they order shingles or tiles: how many bundles make a square, what a 6:12 pitch is in degrees, how much roof sits on a given footprint, how many Marley or Redland tiles cover a square metre, and what a new roof costs in the US and the UK. Each guide is grouped under the calculator it belongs to, quotes the data sheet or cost guide behind its figures, and ends with that calculator so you can run your own roof.
Roof shingle calculator
Open the tool- How many bundles of shingles per square? (with roof size chart)Three bundles per square for standard shingles (Owens Corning, IKO); squares and bundles for 1,000 to 3,000 sq ft footprints at 4:12 to 10:12; UK tiles per m2.Roof shingle calculator
- How much does a new roof cost for a 1,500 square foot house?Installed cost for a 1,500 sq ft footprint at 6:12 by material, from the HomeAdvisor 2026 ranges per square; charts for 1,000 to 3,000 sq ft and UK cost per m².Roof shingle calculator
- How many shingles do I need for a shed? (8x8 to 12x16 chart)Bundles, underlayment, ridge cap, nails and drip edge for 8x8 to 12x16 ft gable sheds at 4:12 and 6:12 (Owens Corning, IKO); a 10x10 shed takes 4 bundles.Roof shingle calculator
- How much does a metal roof cost? (per square foot and by house size)$7 to $13 per sq ft of roof installed (HomeAdvisor 2026): $15,652 to $29,069 for a 2,000 sq ft footprint at 6:12. Charts by size, pitch and material.Roof shingle calculator
Roof pitch calculator
Open the toolRoof tile calculator
Open the tool- Roof tiles price per m² in the UK: types, price per tile and the cost to tile a roofRoof tiles cost £80 to £150 per m² fitted for concrete, £120 to £230 clay, £150 to £300 slate (MyJobQuote 2026); price per tile and tiles £/m² by type.Roof tile calculator
- How to calculate roof area in square metres (UK pitched and hip roofs)Roof area = plan area x pitch factor: 1.221 at 35°, so 12 x 9 m is 131.8 m² of roof. Chart for 8 x 6 to 15 x 10 m at 25° to 45°, gable vs hip, tiles.Roof tile calculator
- How many roof tiles per m²? Tiles per square metre by type (Marley, Redland, plain clay, slate)Roof tiles per m² by type from the data sheets: Marley Modern 9.9, Redland 49 17.7, plain clay 60, slate 20; gauge, battens and the tiles for 50 to 150 m².Roof tile calculator