Framing & carpentry calculators

Stairs, studs, joists, rafters, decks, sheets and board feet — layout counts and cut lengths in feet-inches or millimetres. Every one works in feet and inches or in metric — flip the switch at the top and the numbers you have typed convert with it.

• Stairs riser count, riser & tread size, stringer length
• Stair stringer layout every mark and cut on the board, printable
• Board feet board footage of rough or dimensional lumber
• Studs stud count & plate length for a wall
• Joist spacing joist count & spacing to fill an opening
• Deck boards decking rows, boards & linear feet
• Deck footing layout posts, beams and where every footing goes
• Rafter length common rafter cut length from run & pitch
• Hip & valley rafter hip length, hip plumb cut & jack difference
• Crown molding miter & bevel for any corner and spring angle
• Roofing squares & bundles from footprint and pitch
• Wall framing studs, plates, header length & sheathing for a wall
• Shed framing and sheet materials list for a gable shed
• 3-4-5 square diagonal to prove a square corner
• Right triangle solve sides & angle from any two
• Lumber weight weight of a board or stack for handling
• Plywood sheets sheet count for a surface area
• Baluster spacing even spindle layout under your max gap
• Miter angle cut angles for any number of sides or corner
• Linear feet linear ft ↔ board feet ↔ square feet
• Metal roofing panels, lengths & screws from coverage width

Which one do I need?

Layout counts and cut lengths, read the way a tape reads — feet, inches and sixteenths, or millimetres. Lumber sizes stay as their names (2x4, 2x10); spacing and counts only, never a span or a load.

• Laying out a set of stairs? Stair calculator →
• Marking the stringer itself? Stair stringer layout calculator →
• Where do the deck posts go? Deck footing layout calculator →
• A lumber list for a shed? Shed calculator →
• How many studs in a wall? Stud calculator →
• The whole wall — plates, headers, sheathing? Wall framing calculator →
• Rafter cut length from the pitch? Rafter length calculator →
• Squaring up a corner? 3-4-5 square calculator →
• Pricing lumber by the board foot? Board foot calculator →
• Spacing balusters under a railing? Baluster spacing calculator →
• The saw setting for a corner or a frame? Miter angle calculator →

The other drawers

• Concreto y mampostería
• Terreno y jardinería
• Acabados e interiores
• Medición y trazo
• Electricidad
• Plomería y HVAC
• Taller y equipo
• Conversiones
• Todas las herramientas