Calculate your project before you buy materials.

Gallons for walls and ceilings by room size, coats and paint coverage — doors and windows deducted.

Sheets of drywall for walls and ceilings, plus screws, tape and joint compound to finish the job.

Rolls of wallpaper from wall dimensions, roll coverage and pattern repeat — matched patterns included.

Linear feet of baseboard, casing and crown moulding, converted to standard board lengths.

Cubic yards for slabs, footings and posts — plus the 80 lb bag count if you are mixing it yourself.

CMU block count for a wall, with mortar bags and core-fill concrete included.

Bricks and mortar for veneer walls, garden walls and patios, by brick size and joint width.

Bags of mortar for block, brick and stone work, matched to mortar type and joint size.

Deck boards, joists and fasteners from deck size and board width — in lumber or composite.

Posts, rails and pickets for a privacy or picket fence, with concrete per post hole.

Cubic yards and bag counts for garden beds at the depth your plants actually need.

Cubic yards and tons of gravel, crushed stone or sand for driveways, paths and drainage.

Cubic yards of topsoil for lawns, raised beds and grading, with settling allowance.

Roofing squares and shingle bundles from your home footprint and pitch — measured from the ground.

Convert rise and run to pitch, angle and slope percentage — and back again.

Square footage for quartz, granite and laminate counters, including backsplash and overhang.

Tile count for a kitchen or bath backsplash, net of outlets, windows and range openings.

Area of any room or surface in square feet, square yards and square metres — with waste allowance and material cost.

Board feet from lumber thickness, width and length — and the price for the stack.

Cubic yards from length, width and depth for soil, mulch, gravel and concrete orders.