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Roofing Calculator

Enter the building size, overhang and roof slope to get the sloped roof area and the number of sheets or tiles to cover it.

Enter your details

°
A 1:3 rise-to-run is about 18°, 1:2 is about 27°.
sq ft
Net coverage after overlaps, from the supplier's data.
%
Allowance for spillage, cutting and breakage.
Rs.

SARZAMEEN Tools | Roofing Calculator

Estimate generated 19 Oct 2026 | https://property.candletrack.pro/public/buildcraft/tool/roofing-calculator

Results

Enter your values and press Calculate. Results will appear here and update as you change inputs.

    Results are estimates, not quotations. Confirm quantities and prices with your contractor or supplier.

    How this calculator works

    • Sloped area = plan area (with overhang) ÷ cos(slope angle).
    • Pieces = sloped area × (1 + wastage) ÷ effective coverage per piece.

    Frequently asked questions

    Divide rise by run (for example 4 ft over 12 ft) and use arctan(rise ÷ run), or measure with a phone inclinometer.

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