Calculate the exact number of roofing sheets, ridge caps, nails, and accessories needed for your building project. Supports long-span aluminium, step tiles, and stone-coated materials.
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.
A typical 3-bedroom bungalow (12m x 10m) with a gable roof at 25 degrees pitch needs approximately 42-48 long-span aluminium sheets, plus 12-14 ridge caps. The exact number depends on roof complexity and overhangs.
0.55mm is standard residential grade — lighter and cheaper. 0.7mm is heavier duty, better for commercial buildings or areas with high wind/rain. Price difference is about 30-40% more for 0.7mm.
As of 2025, long-span aluminium (0.55mm) costs NGN 4,500-6,000 per metre length. A full 3-bedroom bungalow roofing (sheets + accessories + labour) ranges from NGN 1.5M-3M depending on material choice and location.
Not sure how to get the most from the Roofing Material Calculator? Enter your measurements and quantities and it returns a costed material and labour estimate — built for all 54 African countries.
Reviewed 2026. Results are a guide — always confirm current local material prices and site specifics before acting.
Enter your measurements and quantities in the fields above. The Roofing Material Calculator then gives you a costed material and labour estimate you can use straight away.
It is as accurate as the values you enter and shows the assumptions behind the result. Always confirm current local material prices and site specifics before you rely on it.
Yes — it is completely free, works on any phone or computer with no signup, and is built for all 54 African countries.