Roof Sheet Quantity Calculator
Use your roof surface area, the sheet’s effective cover width (not overall width) and typical sheet length to estimate order quantities.
Don’t know the m²? Measure the roof on the satellite map →
Results
- Coverage per sheet
- —
- Sheets (net)
- —
- Order quantity
- —
Effective cover width varies by profile (corrugated, trimdek-style, etc.). Confirm with your supplier’s data sheet.
Sheet lengths are often custom-cut. Ridge, barge and valley flashings are ordered separately. Need supply & install? Colorbond roofing.
Common cover widths
- Many corrugated-style sheets: ~760–775 mm effective cover
- Trapezoidal / decking profiles: check manufacturer (often 700–820 mm)
- Always use effective cover, not overall sheet width including side lap
Planning a roof in Brisbane or on the Coast?
Use the calculators for ballparks, then get a site measure for materials that fit your home.
Call 0411 510 699