Work it out.
Calculators
Occupant capacity and escape route width
BR18 (forsamlingslokaler/butik)
CCTV storage requirement
Enhedsomregning (bitrate → bytes)
Lifting limit for manual handling
AT guidance on ergonomic working environment (VEJ no. 10133 of 01/10/2026)
Rest period between two shifts
Arbejdsmiljøloven / AT-vejledning om daglig hvileperiode (5.1.1)
The 48-hour rule (average working time)
Arbejdsmiljøloven / EU-arbejdstidsdirektiv 2003/88/EF
Supplements for evening, night and Sunday/public holiday shifts
Vagttillæg — indtast din egen overenskomsts satser
Battery capacity for emergency lighting
DS/EN 1838 (nødbelysning — minimumsfunktionstid)
Number of portable fire extinguishers along a route
BR18 kap. 7 (drift, kontrol og vedligehold) / DBI-vejledning (varmt arbejde)
Number of PIR motion sensors
Producentdata (PIR-bevægelsessensor, typisk 12×12 m ved 110°)
Escape route distance — within the BR18 limit?
BR18 kap. 2 (Evakuering og redning af personer)
Time spent on a security patrol
Forholdsregning (gangfart)
Response time for callouts to an alarm
Forholdsregning (afstand/hastighed)
Radio coverage — is the distance within range?
Producentdata (PMR446, licensfri, 0,5 W)
Number of first aid kits by number of employees
DIN 13169 (branchevejledende norm for førstehjælpskasser)
Number of defibrillators for full coverage
Dansk Råd for Genoplivning (Hjertesikker Zone)
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.