Construction

Stairs, concrete and roofing, checked against building code limits.

• CAD Drawing Board07·01Draw plans to scale in the browser: lines, arcs and dimensions on a very large canvas, with snapping, layers and DXF export. Nothing is uploaded.
• Stair Stringer Calculator07·02Calculate rise, run, stringer length and tread count from your total floor height. Checks results against building code limits.
• Concrete Slab Calculator07·03Work out how many cubic yards or metres of concrete a slab needs, plus bag counts and a waste allowance.
• Tile & Flooring Calculator07·04How many tiles a room needs, and how many boxes to actually buy — with wastage applied the way a tiler does it.
• Roof Pitch Calculator07·05Convert roof pitch between rise-per-12, degrees and percent, then get rafter length and the true roof surface area.
• Paint Calculator07·06How much paint a room needs and how many cans to buy — openings subtracted first, coats and coverage from the tin, rounded only at the till.
• Brick & Block Calculator07·07How many bricks or blocks a wall needs, plus the mortar volume — counted by the course module with the joint included, the way a mason quotes.
• Laminate Flooring Calculator07·08How many packs of laminate a floor needs — waste applied before rounding, packs rounded once, spare planks reported for future repairs.
• Wallpaper Calculator07·09How many rolls a room takes — drops per roll at your ceiling, the pattern repeat included, which is where every hand estimate goes wrong.
• Plaster Calculator07·10Plaster and putty in bags: area × thickness × the bag's own kg/m²/mm figure, waste before rounding, rounded once at the till.
• Rebar Weight Calculator07·11Rebar mass from diameter and length by the estimator's d²/162 with exact GOST 5781 table masses — kilograms, metres per tonne and 12 m bars to buy.
• Drywall Calculator07·12Sheets, profiles, screws, tape and putty for a wall or ceiling from its area — Knauf consumption figures, waste applied before rounding into whole sheets.