5 calculators
Roofing
Roof area, pitch, coverings, gutters, ventilation.
Roof Tile CalculatorRoof area, tiles, battens, sarking and ridge cappingRoof Pitch CalculatorConvert rise/run, x/12, degrees and percentRoof Sheeting CalculatorPanels, trim, closures and screwsGutter CalculatorGutter lengths, downspouts, hangers and fittingsRoof Space Ventilation CalculatorEaves and high-level vents to NCC 10.8.3
Guides for this trade
Roofing
Roof estimating: true area, tiles, sheets and sarking
Turn a building footprint into true roof area with the pitch factor, then count every material from the eaves to the ridge.
3 min readRoofingRoof pitch explained: x/12, degrees and percent
Why Australian roofers quote degrees and US product data says 6/12, how to convert between them, and how to measure an existing roof.
3 min readRoofingGutters: sizes, downpipes and brackets
How much gutter a roof needs, where to put the outlets, and the fittings that make up a complete run.
3 min read