Home & construction calculators

Calculate floor area ratio from lot size and floor area, or find the maximum floor area zoning allows.

Find the number of steps, riser height, run, stringer length and angle for a staircase or deck stairs.

Find how much mulch you need for garden beds in cubic yards and bags, with coverage and cost.

Find the cubic yards and tons of gravel needed for a driveway, path or base, with compaction and cost.

Find the cubic yards of concrete or bags of mix needed for a slab, patio, footing or post hole.

Find how many tiles you need for a floor, wall or backsplash with grout lines, waste, boxes and cost.

Calculate square footage of a room, house or lot for rectangles, triangles, circles, trapezoids and L-shapes.

Estimate roof area, roofing squares and shingle bundles from size, pitch and overhang.

Find roof pitch, angle, slope and rafter length from rise and run, with a roof pitch chart.