All 20 Calculators

Enter total rise and run. Get riser count, tread depth, stringer length, cut angle, and an automatic IRC 2021 compliance check. Adjusts for headroom clearance.

Room dimensions to a full drywall material list: sheet count, screws, joint tape, joint compound, and corner bead — with cost estimates.

Roof area, pitch, and regional rainfall intensity feed SMACNA sizing tables to output gutter size, downspout count, and hanger spacing.

Select climate zone and assembly type (attic, wall, floor, crawlspace) to get IRC 2021 minimum R-value requirements and common material options.

Deck footprint dimensions generate a complete BOM: decking boards, joists, rim boards, posts, concrete footings, hardware, and optional railing. Cost estimate included.

Pour type, dimensions, and bar spacing yield total bar count, lap splice allowance, chair count, cut list summary, and total weight in lbs.

Fireplace opening dimensions and BTU input. NFPA 211 sizing tables output flue liner size, flue area, and minimum chimney height for proper draft.

Bedroom count and soil percolation rate determine tank size, drain field length, and absorption area. Outputs state-level code references.

Searchable reference for UNC, UNF, Metric, and NPT thread standards. Shows drill size, tap drill, clearance drill, and thread pitch. Save favorites.

Application speed, nozzle spacing, and target GPM yield gallons per acre (GPA), tank load count, and coverage area for agricultural or landscape spray equipment.

Calculate board feet from thickness, width, and length. Works in nominal or actual dimensions. Multiple boards, multiple species — total cost estimate included.

Wall length, stud spacing, and opening count (doors/windows) yield total stud count with corner and king stud allowances. Plate count and cost included.

Slabs and piers: enter length, width, and depth to get cubic yards and bag counts for 40 lb, 60 lb, and 80 lb bags. Also handles round piers.

Enter run and pitch to get rafter length, ridge board length, and slope angle. Also works in reverse — enter rafter and run to find pitch.

Building footprint and pitch yield true roof area in squares (100 sq ft). Waste factor adjustable. Outputs shingles, underlayment, and ridge cap needed.

Every calculation is automatically saved so you can reference or re-run it later. Tap any item to load it back into the calculator.

Manually save any result with a custom label. Pull it up later on the job or share it with your crew.

Pro tools are clearly labeled. Tap to unlock the Carpentry Pack with a one-time purchase — no subscription.