ToolPebConstruction & Trades tools
Choose the task you need. Each tool explains its inputs, supported options and result.
Concrete slab quantityVolume = L × W × thickness/1000 × (1 + allowance/100)Wall paint quantityLitres = area × coats / coverageTile purchase quantityTiles = ceil(area / tile area × (1 + allowance/100))Brick count from net wall volumeBricks = ceil(net volume / module volume × (1 + allowance/100))Roof rise from pitch angleRise = run × tan(angle)Grade / slope percentSlope = rise / run × 100Equal stair riser heightRiser height = total rise / riser countSteel bar mass from diameterMass = π(d/1000)² / 4 × length × densityRectangle second moment of areaI = b h³ / 12Elastic beam bending stressσ = M / ZRectangle elastic section modulusZ = b h² / 6Cantilever tip deflection from point loadδ = PL³ / (3EI)