5 calculators
Roofing
Roof area, pitch, coverings, gutters, ventilation.
Roof Tile & Slate CalculatorRoof area, tiles, battens, membrane and ridgeRoof Pitch CalculatorConvert rise/run, x/12, degrees and percentMetal Roof Sheet CalculatorPanels, trim, closures and screwsGutter CalculatorGutter lengths, downspouts, hangers and fittingsRoof Ventilation CalculatorEaves and high-level vent requirements
Guides for this trade
Roofing
Roof estimating: true area, tiles, battens and membrane
Turn a building footprint into true roof area with the pitch factor, then count every material from the eaves to the ridge.
8 min readRoofingRoof pitch explained: x/12, degrees and percent
Why US roofers say 6/12 and UK roofers say 26.5°, how to convert between them, and how to measure an existing roof.
4 min readRoofingGuttering: sizes, outlets and brackets
How much gutter a roof needs, where to put the outlets, and the fittings that make up a complete run.
4 min read