Work it out.
Calculators
Daily feed quantity
Ren matematik — du indtaster selv tallene fra foderposen/foderplanen
Medication dosing by weight
Ren matematik — du indtaster dyrlægens ordination og præparatets styrke
Area and surfacing in an enclosure
Ren geometri — du indtaster selv kravet til areal pr. dyr
Mixing and dilution
Ren matematik — du indtaster selv blandingsforholdet fra produktets vejledning
Daily energy requirement by Kleiber's law
Kleibers lov (biologisk skalering) — brugt i zoologisk/veterinær fodringsplanlægning
Horse stable — minimum area by height at the withers
Bekendtgørelse nr. 1746 af 30/11/2020 om velfærdsmæssige mindstekrav til hold af heste
Rabbit cage for laboratory animals — minimum area (ETS 123, Appendix A)
Europarådets konvention ETS 123, bilag A (revideret 2006) — forsøgsdyrsanlæg
Terrarium — UV-B distance by Ferguson zone
Ferguson-zoner (Ferguson et al., 2010) + omvendt kvadrat-lov for UV-stråling
Aquarium — fish stocking by the litre rule
Erfaringsregel (akvaristik) — ikke en biologisk eller lovmæssig standard
Aquarium — required filter capacity (turnover per hour)
Brancheanbefaling (akvarie-filterproducenter)
Animal transport — driving time and statutory rest
Forordning (EF) nr. 1/2005, bilag I, kapitel V, punkt 1.4-1.5
Hen house — space requirement per hen
Rådets direktiv 1999/74/EF om mindstekrav til beskyttelse af æglæggende høner
A dog's daily water requirement (rule of thumb)
Veterinærfaglig tommelfingerregel (ca. 50 ml/kg/dag, danske dyrlægekilder)
Feed cost per day, month and year
Ren matematik — du indtaster selv dagsration og foderpris
Pool/pond — water volume
Geometry (volume)
Funnel and hopper
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.