Roof & timber: calculators
Roofing Calculator, Stair Calculator, Roof Pitch Calculator, Rafter Length Calculator, Roof Shingle Calculator.
Roofing Calculator
Calculate sloped roof area with waste allowance from footprint dimensions and roof pitch.
Stair Calculator
Calculate the number of risers, actual riser height and tread depth from total rise and available run.
Roof Pitch Calculator
Convert roof rise and horizontal run into angle, percentage slope and roof area multiplication factor.
Rafter Length Calculator
Calculate common rafter length and rise to ridge from building span, roof angle and horizontal overhang.
Roof Shingle Calculator
Calculate sloped roof area, cutting allowance and whole shingle bundles from footprint and coverage.
Metal Roof Panel Calculator
Calculate the number of full-length metal roof panels, total panel length and covered area for one roof slope.
Gutter Calculator
Calculate gutter length with allowance, whole stock sections and a planning count of downspouts.
Wall Stud Calculator
Calculate regular wall studs plus additional framing at door and window openings, corners and wall ends.
Lumber Volume Calculator
Calculate total linear length and solid timber volume from piece count, length, width and thickness.
Plywood Sheet Calculator
Calculate covered area and whole plywood or OSB sheets from project dimensions, sheet size and cutting allowance.
Siding Calculator
Calculate net facade area, installation allowance and whole siding panels after subtracting openings.
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From measurements to a shopping list
Open a tool, enter your measured dimensions, then save an estimate. Keep another version if you want to compare products or allowances.
Planning estimate. Check product specifications and local requirements before purchasing.