Administration & Infusion 7
- Drug Reconstitution CalculatorCalculatorA powder vial, the diluent you add and the displacement volume the manufacturer states, worked into…
- Fluid Balance Chart CalculatorCalculatorTotals a fluid balance chart over a shift or 24 hours: oral, intravenous, feed and flushes…
- Infusion Pump Rate Calculator (mL/h)CalculatorThe mL/h to set on the pump for a dose already prescribed in mcg/kg/min, mg/kg/h, units/kg/h…
- Infusion Time & Remaining Volume CalculatorCalculatorHow much is left in the bag, how long it has to run, what time it…
- IV Drip Rate Calculator (drops per minute)CalculatorDrops per minute for a gravity infusion from the volume, the time and the giving set’s…
- Oxygen Cylinder Duration CalculatorCalculatorHow long an oxygen cylinder will last at a given flow, worked from the gauge pressure…
- Syringe Driver Rate CalculatorCalculatorA continuous subcutaneous infusion made up to a final volume and run over a set period,…
Everyday Exposure 2
- Caffeine Half-Life Calculator (Several Doses, Named Published Half-Lives)CalculatorFirst-order elimination from up to three doses at different times of day, to a bedtime you…
- Heat Index Calculator (NOAA/NWS Rothfusz Regression, °C and °F)CalculatorThe heat index in °C and °F from air temperature and either relative humidity or dew…
Fitness & Performance 3
- One Rep Max Calculator (7 Formulas, Epley, Brzycki)CalculatorSeven published one-repetition-maximum formulas from one set of inputs — Epley, Brzycki, Lombardi, O’Conner, Wathen, Mayhew…
- Target Heart Rate Zones Calculator (5 Zones, bpm)CalculatorEvery heart rate zone on every watch and every chart rests on two guesses stacked on…
- VO2 Max Calculator (Cooper, Rockport, Uth)CalculatorThree published field estimates of maximal oxygen uptake, computed together from one set of inputs —…
Growth & Paediatrics 2
- Mid-Parental Height Calculator (Target Adult Height, cm)CalculatorFour published versions of the parental-height method for a child's adult height — the Tanner-type 13 cm…
- Paediatric Weight Estimation Calculator (kg, Age-Based)CalculatorWhat six published age-based formulas give for the same child — the traditional APLS (age + 4) × 2, the…
Nutrition Support 5
- Adult Fluid Requirement Calculator (mL/day)CalculatorA baseline maintenance volume for an adult by three named, separately sourced methods — mL per…
- Energy Requirement Calculator (Mifflin, Harris-Benedict, Schofield)CalculatorWhat five published predictive equations yield in kcal/day for one set of inputs — Mifflin-St Jeor…
- Enteral Feed Rate Calculator (mL per hour)CalculatorMillilitres an hour for a tube feed, from the energy target, the feed's energy density and…
- Parenteral Nutrition Macronutrient CalculatorCalculatorEnergy from each macronutrient in a parenteral nutrition bag, the non-protein energy, and the nitrogen-to-energy ratio…
- Protein Requirement Calculator (g per day)CalculatorGrams of protein a day from the published g/kg/day range for a clinical condition, on a…
Pregnancy & Obstetrics 3
- Ovulation & Fertile Window CalculatorCalculatorA predicted ovulation day and a fertile window, counted backwards from the next expected period because…
- Pregnancy Due Date & Gestational Age CalculatorCalculatorGestational age in completed weeks and days, and an estimated due date, by four separately sourced…
- Pregnancy Weight Gain Calculator (kg, by BMI)CalculatorThe recommended total gain for a pre-pregnancy BMI category, from the ranges the Institute of Medicine…
Screening & Risk 5
- Alcohol Units Calculator (UK Units, US Drinks, Grams)CalculatorHow much pure ethanol is in a drink, and what that same amount is called in…
- Blood Pressure Category Calculator (Adults, 3 Guidelines)CalculatorWhere one adult blood pressure reading falls on the 2025 AHA/ACC criteria, the 2024 ESC criteria…
- Metabolic Syndrome Criteria Calculator (4 Definitions, 2 Waist Thresholds)CalculatorCounts how many of the five published criteria your measurements meet, and reports which of four…
- Peak Expiratory Flow Predicted Calculator (L/min)CalculatorWhat four published reference equations give for the same adult — Nunn and Gregg's 1989 UK…
- Smoking Pack-Years Calculator (Cigarettes a Day, Two Periods)CalculatorPack-years from cigarettes a day and years smoked — taking cigarettes rather than packs, because that…
Weight & Body Composition 8
- BMI Calculator (Standard and Asian-Indian Cut-offs)CalculatorBody mass index from height and weight, in metric or imperial, printed to one decimal place…
- BMR and TDEE Calculator (Mifflin-St Jeor)CalculatorBasal metabolic rate from the Mifflin-St Jeor equation, then total daily energy expenditure at every rung…
- Body Fat Percentage Calculator (Navy, Skinfold)CalculatorTwo field methods for estimating the proportion of the body that is fat — the US…
- Calorie Deficit Calculator: What the Linear Rule Gets WrongCalculatorWhat daily intake a given amount of weight change over a given number of weeks implies…
- Daily Water Intake Calculator (And Where 8×8 Came From)CalculatorA drinks-per-day figure built from a published adequate intake, minus the water that comes from food,…
- Macronutrient Split Calculator (Grams From Percentages)CalculatorGrams of protein, carbohydrate and fat from a total energy figure and a split you choose,…
- Waist-to-Height Ratio Calculator (the 0.5 Boundary)CalculatorWaist divided by height, computed from the figures as typed because the ratio is dimensionless, printed…
- Waist-to-Hip Ratio Calculator (No Borrowed Thresholds)CalculatorWaist divided by hip, computed from the figures as typed so no unit conversion enters the…
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