medicine Calculators
Last updated: May 2026
BMI Calculator
Instantly compute your Body Mass Index from weight and height to screen which WHO weight category you fall in.
Basal Metabolic Rate Calculator
Estimate the calories your body burns at complete rest using the Mifflin-St Jeor equation, then multiply by an activity factor to get Total Daily Energy Expenditure.
Mean Arterial Pressure Calculator
Compute Mean Arterial Pressure (MAP) from a standard systolic/diastolic blood-pressure reading.
Body Surface Area Calculator
Calculate body surface area (BSA) in m² using the Mosteller, Du Bois or Haycock formula from your weight and height.
Creatinine Clearance Calculator
Estimate kidney function as creatinine clearance (CrCl) in mL/min using the Cockcroft-Gault equation.
Ideal Body Weight Calculator
Estimate ideal body weight in kg from height using the Devine formula, returning a single reference weight for a given sex.
Heart Rate Zone Calculator
Compute a target training heart rate using a Karvonen-style formula with resting heart rate, maximum heart rate estimated as 220 minus age, and a combined intensity factor (training zone × fitness level).
Medication Dosage Calculator
Compute a renal-function-adjusted medication dosage using patient weight, the prescribed mg/kg dose, and Cockcroft-Gault creatinine clearance scaled to a reference of 120 mL/min.
Pregnancy Due Date Calculator
Estimate days until estimated due date using Naegele's rule from the date of last menstrual period and cycle length.
BSA-Based Dosage Calculator
Compute a body-surface-area-based medication dose using the DuBois BSA formula multiplied by the per-m² dose.
Daily Fluid Requirements Calculator
Estimates a patient's daily fluid needs using the Holliday-Segar method, a tiered weight-based formula.
Corrected Calcium Calculator
Adjusts a patient's measured serum calcium for low albumin levels, revealing the true physiologically active calcium concentration.
Anion Gap Calculator
Calculates the anion gap from serum sodium, chloride, and bicarbonate to help identify the cause of metabolic acidosis.
Pack Years Calculator
Calculates cumulative smoking exposure in pack-years by multiplying daily cigarette packs by years smoked.
Waist-to-Hip Ratio Calculator
Divides waist circumference by hip circumference to produce a simple index of abdominal fat distribution and cardiovascular risk.
Body Fat Percentage Calculator
Estimate your body fat percentage using the US Navy circumference method.
Glasgow Coma Scale Calculator
Score a patient's level of consciousness using the Glasgow Coma Scale (GCS).
Framingham Risk Score Calculator
Estimate your 10-year risk of a cardiovascular event using key lab and clinical values.
Pediatric Fever Medication Calculator
Calculate the correct acetaminophen or ibuprofen dose for a child based on weight.
BMI & Body Fat Percentage Calculator
Calculate your BMI and estimate body fat percentage using your weight, height, age, and gender.
Daily Calorie Needs Calculator
Estimates your Total Daily Energy Expenditure (TDEE) using the Mifflin-St Jeor equation.
Blood Pressure Category Calculator
Calculates your Mean Arterial Pressure (MAP) from systolic and diastolic readings and classifies your blood pressure category per AHA guidelines.
Kidney Function Calculator (eGFR)
Estimates your glomerular filtration rate (eGFR) using the CKD-EPI equation from serum creatinine, age, sex, and race.
10-Year Heart Disease Risk Calculator
Estimates your 10-year risk of a cardiovascular event using key clinical risk factors including age, blood pressure, cholesterol, HDL, and smoking status.
BMI and Body Fat Calculator
Computes your BMI and estimates body fat percentage from weight, height, age, and sex.
Blood Pressure Risk Calculator
Estimates cardiovascular risk from your blood pressure readings, age, smoking status, and diabetes.
Calorie Deficit & Weight Loss Calculator
Estimates how many weeks it will take to reach your target weight by modeling your calorie deficit as your body weight—and therefore your TDEE—decreases over time.
BMI & Body Fat Calculator
Calculate your BMI and estimated body fat percentage using your weight, height, age, and gender.
Medication Dosage Calculator
Calculate a weight-based medication dose adjusted for patient age and kidney function.
Blood Pressure Risk Assessment Calculator
Assess your cardiovascular risk score based on blood pressure readings, age, smoking status, and family history of heart disease.
Kidney Function (GFR) Calculator
Estimate your glomerular filtration rate (eGFR) using the MDRD equation to assess kidney function and chronic kidney disease (CKD) stage.