Estimate roofing sheets, ridge caps, nails and preliminary timber allowances from your dimensions and the current coverage width on the selected product.
Roofing is one of the most expensive components of building construction in Africa. Whether you're using long-span aluminium roofing (the most popular choice in Nigeria), stone-coated step tiles, or traditional corrugated iron sheets, accurately calculating the number of sheets needed saves money and prevents delays.
The basic formula is: Roof Area / Sheet Coverage Area = Number of Sheets. However, you must account for the roof pitch (which increases the actual roof area compared to the floor area), eave overhangs, and overlapping between sheets. This calculator handles all these factors automatically.
Long-span aluminium (0.55mm or 0.7mm gauge) is the most popular roofing material in West Africa due to its durability and rust resistance. It comes in custom lengths, reducing waste. Stone-coated step tiles are premium options that mimic clay tiles at lower weight. Corrugated iron sheets remain common for budget builds and rural construction.
Enter the building dimensions, roof type, pitch, overhang and effective coverage width from the current product sheet. The result is a planning estimate, not a structural design.
No. A licensed engineer or roof professional must verify loads, wind uplift, spans, members, connections, drainage and local code requirements.
No. Prices, effective sheet widths and fixing requirements change by product, supplier, location and date. Confirm the current product sheet and written supplier or contractor quotation.
Enter your measurements, pitch and effective sheet width to get a planning estimate of roofing sheets and preliminary accessories.
Reviewed 2026. Results are a guide — always confirm current local material prices and site specifics before acting.
Enter your measured dimensions, roof type, pitch, overhang and current effective sheet width.
It is a geometry-based planning estimate. Confirm current product dimensions and all structural and fixing decisions with a licensed professional.
No. It contains no live price, stock, labour or contractor data.