Roof area calculator

Find the area of a sloping (gable) roof from the building size, overhang and pitch, and count the sheets or tiles needed.

How it works

For a gable roof, each slope length = half the span ÷ cos(pitch), roof area = 2 × slope length × roof length, and ridge height = half the span × tan(pitch). Span and length include the overhang. The sheet count uses the sheet size and the overlap you enter.

Always confirm measurements for a purchase or registration with official records.

More calculators

Plot area calculatorArea of any plot, in every local unit Acre, gunta and cent calculator2 acres 20 guntas? Get the exact total Jewellery price calculatorGold value, wastage, making and GST in one bill Brick and mortar calculatorBricks, cement and sand for a wall Concrete and cement calculatorCement bags, sand and aggregate by grade Steel weight calculatorWeight of TMT bars by diameter and length Tile calculatorNumber of tiles for a room, with wastage Paint calculatorLitres of paint for walls and ceiling Plaster calculatorCement and sand for plastering Excavation calculatorVolume to dig and loads to remove Water tank capacity calculatorTank litres and days of supply Gold purity (karat) calculatorKarat, percentage and hallmark, side by side