Free Construction Calculators
Free online tools for stairs, concrete, lumber, tile, drywall, roofing, paint, and remodel costs. No login required.
BuildCalc offers free DIY construction calculators for contractors, builders, and homeowners. Estimate stair rise and run, concrete volume and bag count, lumber board feet and weight, tile quantity and layout, drywall sheet count, roofing materials, paint coverage, deck materials, grout coverage, solar panel count, and kitchen or bathroom remodel costs — all in your browser with no account needed.
Construction calculators
- Stair Calculator — rise, run, riser count, stringer length, and IRC code check
- Concrete Calculator — cubic yards, bag count for 40/60/80 lb bags, waste factor
- Lumber Board Feet Calculator — board feet, linear feet, lumber weight by species
- Tile Calculator — tile count, layout, overage, and box count
- Drywall Calculator — sheet count, joint compound, tape, and screws
- Roofing Calculator — squares, shingle bundles, underlayment, drip edge
- Paint Calculator — gallons by room area, coats, doors, and windows
- Deck Calculator — boards, joists, posts, tube form footings, fasteners
- Grout Calculator — grout bag count by tile size, joint width, and area
- Remodel Cost Estimator — kitchen and bathroom remodel budget by finish level
- Solar Panel Calculator — panel count, system kW, annual kWh output, savings