Work it out.
Calculators
Rafter length and roof surface area
Geometri (Pythagoras)
Number of rafters and running metres of battens
Geometri (materialeoptælling)
Stairs - rise, going and stride length
Bygningsreglementet BR18 §57 + skridtmålsreglen
Wood moisture by the weighing method
EN 13183-1 (ovntørringsmetode) / Træ.dk
Concrete for pad foundations and post holes
Geometri + producentdata (tørbeton 25 kg ≈ 12,5 l)
Concrete for slab and floor casting
Geometri + producentdata (tørbeton 25 kg ≈ 12,5 l)
Click and laminate flooring - consumption and expansion gap
Junckers lægningsvejledning (1,5 mm/m, min. 12 mm)
Self-levelling floor compound - consumption
Producentdata (Weber/Alfix gulvspartel, ~1,3-1,8 kg/m²/mm)
Thatched roof - reed and dead load
Tækkefagets materialelære (danskbyggeskik.dk / Tækkelauget)
Thatched roof - fire safety distance to the boundary
Bygningsreglementet BR18, kap. 5 (brand)
Partition wall - timber and plasterboard consumption
Geometri (materialeoptælling, stolpe c/c)
Insulation thickness for the desired U-value
DS 418 / U = λ / d (forenklet énlags-overslag)
Fall on a flat roof
PTM-anvisning / SBi: min. tagfald 1:40 (25 mm/m)
Batten spacing to roof tile
Producentens oplægningsvejledning / TEGL 36
Decking boards - consumption
Geometri (dæklægning, brætbredde + fugeafstand)
Edge profile — free bend profile in thin sheet
Exact flat pattern
Edge-bent panel
Exact flat pattern
Gutter — half-round, quarter-round and box
Exact flat pattern
Chimney flashing, 4-part
Exact flat pattern
Roof collar around a round pipe
Exact flat pattern
Vent cowl
Exact flat pattern
Valley and ridge
Exact flat pattern
Window sill — bottom flashing
Exact flat pattern
Cyclone and dust separator
Exact flat pattern
Spiral staircase
Exact flat pattern
Rafter template
Exact flat pattern
Roof surface covering
Exact flat pattern
Tools that work in all subjects
Whatever your programme is called, these tools calculate the same — Pythagoras, area, percentages and units are not tied to one trade.
- Pythagorasa² + b² = c²Find the missing side, set out a right angle, check whether a room is square, and find the space diagonal.
- Area and perimeterm²Rectangle, triangle, trapezium, circle and composite shapes — area and perimeter.
- Volume and surface aream³ · lBox, cylinder, cone, sphere, pyramid, prism, pipe and frustum — also in litres.
- Percent%Percentage of, how many per cent, percentage change, discount and VAT.
- Scale and ratios1 : 50From drawing to reality, area and volume to scale, the rule of three and dividing in a ratio.
- Unit convertermm ↔ mFrom mm to km, Pa to bar and kB to GB — with the unit staircase.
- Time calculations and the clockt : minTime between two clock times, add time, and 1.75 h = 1 h 45 min for the timesheet.
- Slope and fall% · ° · 1:xFall from level to level, in per cent, per mille, degrees and mm per metre — and the height difference.
- Material consumption including wastem² + %Boards, paint, battens at c/c spacing and packs — for a composite surface or a whole room, with waste.