🩺 Health & Medical Calculators
Dosage, fluids and health math — educational tools with cited formulas.
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mg to mL Calculator
Convert a drug dose in milligrams to a volume in millilitres using its concentration.
Open calculator →IV Drip Rate Calculator
Find IV drip rate in drops per minute and mL per hour.
Open calculator →Maintenance Fluid Calculator (Holliday-Segar)
Daily and hourly maintenance IV fluids by the 4-2-1 rule.
Open calculator →Tidal Volume Calculator
Lung-protective tidal volume from ideal body weight.
Open calculator →Steps to Miles Calculator
Convert step count to miles using your height-based stride.
Open calculator →Caffeine Half-Life Calculator
See how much caffeine remains in your body over time.
Open calculator →Dog Chocolate Toxicity Calculator
Estimate theobromine dose from chocolate a dog ate.
Open calculator →ABG Interpreter Calculator
Interpret an arterial blood gas: acidosis, alkalosis and compensation.
Open calculator →Vancomycin Dosing Calculator (Student Reference)
Weight-based vancomycin dose estimate for study and practice.
Open calculator →Breastfeeding Calorie Calculator
Estimate the extra daily calories needed while breastfeeding.
Open calculator →Intermittent Fasting Calculator
Find when your fast ends and your eating window from a method.
Open calculator →Contact Lens Vertex Calculator
Convert a glasses prescription to contact lens power (vertex).
Open calculator →Odds of Having Twins Calculator
A rough twin-probability estimate from common risk factors.
Open calculator →Miscarriage Risk by Week Calculator
See how estimated miscarriage risk falls as pregnancy progresses.
Open calculator →Ovulation Calculator
Estimate your fertile window and ovulation day from your cycle length and period start date.
Open calculator →Ideal Body Weight Calculator
Estimate ideal body weight from height using the Devine formula.
Open calculator →Lean Body Mass Calculator
Estimate lean body mass (LBM) from weight, height and gender using the Boer formula.
Open calculator →Pregnancy Due Date Calculator
Estimate your due date from the first day of your last menstrual period.
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