Free Medical & Clinical Reference Calculators
BMI, BMR, eGFR, MAP, CHA₂DS₂-VASc score, and other reference calculations used in everyday clinical practice and personal health tracking — instant, and never uploaded.
eGFR Calculator
Estimate kidney function from serum creatinine using the race-free CKD-EPI 2021 equation.
BMI Calculator
Body mass index, weight category, and a healthy weight range for your height.
BMR & Calorie Calculator
Resting metabolic rate and daily calorie needs by activity level.
Pregnancy Due Date Calculator
Estimated due date and current gestational age from your last period or conception date.
Body Fat Calculator
Estimate body fat percentage from height, neck, waist, and hip.
MAP Calculator
Calculate mean arterial pressure from systolic and diastolic blood pressure.
Creatinine Clearance
Estimate creatinine clearance for renal drug dosing.
CHA₂DS₂-VASc Score
Estimate stroke risk in atrial fibrillation from clinical risk factors.
BSA Calculator
Calculate body surface area from height and weight.
Corrected Calcium
Correct total serum calcium for low albumin using the Payne formula.
FIB-4 Index
Screen for advanced liver fibrosis from age and routine labs.
QTc Calculator
Calculate corrected QT interval using Bazett, Fridericia, and other formulas.
ASCVD Risk Calculator
10-year atherosclerotic cardiovascular disease risk (Pooled Cohort Equations).
Reference tools, not medical advice
These calculators reproduce standard clinical formulas for quick reference. They don't replace clinical judgment, a lab result, or a conversation with a qualified healthcare provider — treat every output as a starting point for that conversation, not a diagnosis.