Work it out.
Calculators
Medication dosing
Dosing
Fluid infusion rate
IV-infusionssæt-standard (dråbefaktor i gtt/ml)
Maintenance fluid
2013 AAHA/AAFP væsketerapi-guideline (hund ≈60, kat ≈40 ml/kg/døgn)
Resting energy requirement (RER)
WSAVA Global Nutrition Guidelines (RER = 70 × kropsvægt^0,75)
Daily energy requirement (MER)
WSAVA/AAHA ernæringsvejledning (MER = RER × faktor, hund og kat hver for sig)
Body surface area (BSA)
Kirks BSA-formel (animalsk onkologi/kemoterapi-dosering)
Gestation length
Gennemsnitlig drægtighedslængde hund/kat (veterinær reproduktionslitteratur)
Blood transfusion volume
Standard veterinær transfusionsformel (blodvolumen hund ≈90, kat ≈60 ml/kg)
Safe blood sample volume
Retningslinjer for blodprøvetagning (maks. 10% af blodvolumen enkeltvis, 15% med væskeerstatning)
Dilution of disinfectant
Forholdsregning (fortyndingsligning C₁V₁=C₂V₂)
Fresh gas flow (non-rebreathing circuit)
Veterinær anæstesilitteratur (friskgasflow ≈200-400 ml/kg/min på non-rebreathing kredsløb)
Mean arterial pressure (MAP)
Fysiologisk standardformel (MAP = DBP + ⅓×(SBP−DBP))
Urine output
Veterinær væske-/nyreovervågning (normal diurese ≈1-2 ml/kg/time, oliguri <0,5 ml/kg/time)
Feeding plan based on energy requirement
Producentdata (kcal pr. 100 g foder) × energibehov
Tablet dosage
Forholdsregning (dosis ÷ tabletstyrke)
Fluid plan with rehydration
AAHA/AAFP 2013 and AAHA 2024 fluid therapy: deficit (ml) = kg × dehydration-% × 10
Constant infusion (CRI) on syringe pump
Standard conversion for CRI (e.g. BSAVA Small Animal Formulary): ml/hour = dose × kg × time ÷ concentration
Isoflurane consumption
Dion's simplified formula (Dion 1992; Biro 2014): ml fluid per hour ≈ 3 × fresh gas (l/min) × vol%
Tube feeding: start-up over three days
RER = 70 × kg^0.75 (WSAVA); gradual start with approx. ⅓ of RER per day (veterinary nutritional support)
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.