Work it out.
Calculators
Apprentice pay — estimate
Fuldtidsnorm 37 t/uge · 160,33 t/md
Fluoride varnish consumption (Duraphat)
Medicin.dk · Duraphat 50 mg NaF/ml
Autoclave — cycle time and daily capacity
DS/EN 13060 (min. holdetid 134 °C/3 min. eller 121 °C/15 min.) · cyklustid fra autoklavens brugsanvisning
Sterilisation control — test plan for the autoclave
NIR for tandklinikker (SSI): dagligt kemisk procestjek · biologisk indikator mindst én gang om måneden
Alginate — powder/water mixing ratio
Ren matematik — du indtaster forholdet fra din alginats etiket/doseringsske
Treatment plan — patient capacity per day
Forholdsregning (klinikplanlægning)
Inventory control — reorder point (ROP)
Lagerstyrings-standardformel (reorder point = forbrug × leveringstid + sikkerhedslager)
Patient contribution after public dental care subsidy
Offentligt tandplejetilskud, sygesikringsgruppe 1 (2026-satser)
Radiation dose estimate for intraoral X-rays
Størrelsesorden: ca. 1-1,5 µSv pr. digital intraoral optagelse (rektangulær kollimering) · naturlig baggrundsstråling i DK ca. 3 mSv/år ≈ 8 µSv/dag
Composite filling — number of layers
Klinisk praksis — inkrementel teknik, maks. ca. 2 mm hærdedybde pr. lag
Fluoride intake from toothpaste
Sundhedsstyrelsens/Tandlægeforeningens anbefaling (ppm efter alder) · ppm = mg fluorid pr. 1.000 g
Hand disinfectant consumption
Sundhedsstyrelsen/SSI: 2-5 ml pr. hånddesinfektion, min. 30 sek. indgnidningstid
Sterilisation pouches — consumption from roll
Geometry
Biological indicator tests — annual consumption and price
Producentpris: 3M Attest biologisk indikator, 25 stk (mediqdanmark.dk, 2026-07)
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.