Woodworking & construction toolkit
Woodworking & Construction Calculators
Free lumber, framing and finishing calculators for woodworking, carpentry and DIY construction. Start with board feet and material cost, then open stairs, rafters, drywall and the rest of the toolkit.
Carpentry & framing
Board feet, stairs, rafters, wall studs and deck spans for structural carpentry.
Carpentry & framing
Lumber Board Foot & Cost Calculator
Convert actual lumber thickness, width, length and quantity into board feet or cubic metres, add waste, and estimate material cost in imperial or metric units.
Carpentry & framing
Deck Joist & Beam Span Calculator
Estimate maximum joist span, joist count and whether a mid-span beam is needed from species, 2x size and spacing. Educational spans, not a code table.
Carpentry & framing
Roof Pitch & Rafter Length Calculator
Calculate common rafter length, pitch angle, rise and overhang from building span and a rise-per-12 pitch.
Carpentry & framing
Stair Rise and Run Calculator
Size stair risers, treads and stringer length from total rise and a target step height. Works in inches or millimetres.
Carpentry & framing
Wall Framing Stud Estimator
Estimate studs, extra jack/king pairs for openings, and triple-plate lumber for a wall of given length and on-center spacing.
Fine woodworking & cabinetry
Crown moulding, shelf sag, cabinet doors, balusters, wood movement and segmented rings.
Fine woodworking & cabinetry
Baluster / Spindle Spacing Calculator
Evenly space balusters or pickets between posts so the gap stays at or under the 4-inch (102 mm) sphere rule.
Fine woodworking & cabinetry
Cabinet Door Sizing Calculator
Size overlay or inset cabinet doors and rail/stile cut lengths from the opening, overlay or gap, and stile width.
Fine woodworking & cabinetry
Crown Molding Angle Calculator
Get compound-saw miter and bevel angles from crown spring angle and wall corner. Defaults match 52° spring on a 90° inside corner.
Fine woodworking & cabinetry
Polygon & Segmented Ring Calculator
Miter angle, outside face length and chord for regular polygons and segmented turning rings from side count and diameter.
Fine woodworking & cabinetry
Shelf Sag (Load Bearing) Calculator
Estimate shelf deflection from span, thickness, depth, material and load, and check a simple L/360 stiffness rule.
Fine woodworking & cabinetry
Wood Movement / Expansion Estimator
Estimate seasonal width change of a board from species, flatsawn vs quartersawn cut, and the change in moisture content.
Masonry & site work
Concrete bags, retaining-wall blocks and gravel, soil or mulch volume.
Masonry & site work
Concrete Volume & Bag Estimator
Convert slab or footing dimensions into cubic yards or cubic metres and 60 lb / 80 lb bag counts, with optional waste.
Masonry & site work
Gravel / Soil / Mulch Volume Calculator
Convert a rectangular bed into cubic yards or cubic metres of gravel, soil or mulch from length, width, depth and waste.
Masonry & site work
Retaining Wall Block Estimator
Estimate face blocks, capstones and gravel backfill for a retaining wall from wall size, block size and backfill depth.
Finishing & materials
Drywall, paint or stain coverage, and flooring or tile with waste.
Finishing & materials
Drywall / Sheetrock Estimator
Estimate 4×8 drywall sheets, joint tape and compound for a room from length, width, height, openings and optional ceiling.
Finishing & materials
Flooring / Tile Calculator
Calculate net floor area, order area with waste, and pack count for laminate, hardwood or tile.
Finishing & materials
Paint / Stain Coverage Calculator
Estimate paint or stain from room size, doors, windows, coats and coverage per gallon or litre.
Clusters
- Carpentry & framingBoard feet, stairs, rafters, wall studs and deck spans for structural carpentry.
- Fine woodworking & cabinetryCrown moulding, shelf sag, cabinet doors, balusters, wood movement and segmented rings.
- Masonry & site workConcrete bags, retaining-wall blocks and gravel, soil or mulch volume.
- Finishing & materialsDrywall, paint or stain coverage, and flooring or tile with waste.