Work it out.
Calculators
Items in a drink
Standardgenstand · 12 g ren alkohol
Glasses per bottle
Ren division
VAT on the bill
Dansk moms · 25 %
Split the bill
Ren aritmetik
Coffee strength — Golden Cup
SCA Golden Cup-standard · 55 g/l ±10 %
Cocktail dilution from ice
Bartending-praksis · is-fortynding ved shaking/stirring
Table seating capacity in the room
Branchevejledning · ca. 1,0-1,5 m²/gæst
Food quantity for a buffet
Cateringvejledning · 400 g/gæst ved 2 timer
Amount of cheese for the party
Cateringvejledning · 75-150 g ost/gæst
Blood alcohol — Widmark's formula
Widmarks formel · vejledende overslag
Food cost of a dish
Branchenøgletal · vareforbrug typisk 25-35 % af omsætning
Prime cost — cost of goods + wages
Branchenøgletal · prime cost bør holdes under 65 %
Public holiday supplement
3F/HORESTA Restaurantoverenskomst 2025-2028 · helligdagstillæg 150 % (tjener/servering)
Hourly pay from monthly salary
Fuldtidsnorm 37 t/uge · 160,33 t/md
Ice requirement for cooling
Termodynamik · smeltevarme is 334 J/g, varmefylde vand 4,18 J/(g·°C)
Cocktail batching for a party
Ratio arithmetic
Table turnover per evening
Branche-tommelfingerregel (ikke lovkrav)
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.