Work it out.
Calculators
Paint mixing (2K)
Ratio arithmetic
Paint consumption and coverage
Teoretisk dækkeevne
Wet film from dry film
Volumenbevarelse
VOC content and legal requirements
EU VOC-direktiv 2004/42/EF (autoreparationslakering)
Spray booth – required air volume
Arbejdstilsynet, bilag om industriel overfladebehandling (min. 0,2 m/s i kabinen)
Compressor sizing for a spray gun
Branchevejledning (kompressor-dimensionering til sprøjtemaling)
Number of coats of lacquer for the required dry film
Ratio arithmetic
Filler – hardener mix
Producentdata (2K polyester-spartelmasse, typisk 100:2-3 efter vægt)
Spray pass – overlap and coverage time
Sprøjteteknik (branchepraksis 30-50% overlap)
Material economics for a painting job
Prisberegning (danske lakforhandler-listepriser 2026)
UV spot repair – curing time and capacity
Producentdata (UV-hærdende spot-repair-systemer)
Amount of filler for a dent
Geometri (kuglekalot-volumen)
Masking paper consumption
Geometri (produktdata: 60/90 cm-ruller à 280 m)
Dew point margin before lacquering
Branchepraksis (dugpunktsregel, min. 3°C margin over dugpunkt)
Spray can consumption
Producentdata (spraydåse-dækning ca. 1-1,5 m²/400 ml)
Wheel arch repair panel
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.