Estimate the concrete volume of a slab in cubic yards, the number of 60 lb or 80 lb bags needed, and the material cost.

Estimate the volume, weight, bag count and cost of gravel needed to cover an area at a chosen depth.

Work out how much mulch you need for any garden or flower bed, in cubic feet, cubic yards, cubic meters or bags, plus the cost.

Estimate roof area, roofing squares and material cost from footprint, eave overhang and pitch — with bundle counts per square.

Plan a comfortable, code-friendly staircase: compute the number of steps, riser height, tread depth, total run and stringer length from your total rise and target riser.

Find how many tiles and boxes you need for any room, with floor area, waste allowance and total cost from length, width, tile size and price per box.