Work it out.
Calculators
Facade area
Geometry (rectangle + gable triangle)
Wall area for painting
Geometry
Paint consumption
Rækkeevne (m²/l)
Wallpaper — number of rolls
Geometry
Facade paint — consumption
Rækkeevne (Sadolin facademaling — produktdata 2026)
Primer — consumption on absorbent substrates
Producentdata (grunder til puds/beton, typisk 6-10 m²/l)
Filler — consumption at a given thickness
Producentdata (Polyfilla Ekstra Fin Letvægtsfiller, densitet 0,40 kg/l)
Moisture limit before painting
Malerfagets Behandlingsanvisninger (MBA) — fugtgrænser før maling
VOC content and legal requirements (building paint)
EU VOC-direktiv 2004/42/EF, bilag II (bygningsmaling og -lak, fase 2/2010)
Fall protection — working height
Arbejdstilsynet — fald fra højden (bygge- og anlægsarbejde)
Ladder — safe setup (1:4 rule)
Arbejdstilsynet — sikkerhed ved arbejde på stiger (1:4-reglen)
Minimum temperature for application
Producentdata (minimumstemperatur for påføring af bygningsmaling)
Wood protection — consumption for façade timber
Rækkeevne (producentdata, oliebaseret træbeskyttelse ca. 6-10 m²/l)
Wallpaper paste — consumption
Producentdata (Casco tapetklister, ca. 7,5 m²/l opblandet)
Limewashing — consumption of limewash
Bygningsbevaring (SLKS/Bygningsbevaring.dk) — kalkning med hvidtekalk
Masking tape — consumption
Geometry
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.