Medical Calculators

Clinical reference scores and indices for education — not for diagnosis.

Cardiology

Fick Cardiac Output Calculator

Estimate cardiac output using the Fick principle.

HEART Score Calculator

Risk stratification for major cardiac events in chest pain.

Revised Cardiac Risk Index (RCRI)

Pre-operative cardiac risk index score.

Killip Classification Calculator

Classify heart failure severity in acute MI.

Renal

FENa Calculator

Fractional excretion of sodium for AKI workup.

FEUrea Calculator

Fractional excretion of urea when diuretics used.

Fitness & Body

Body Surface Area (BSA) Calculator

Calculate BSA from height and weight using Mosteller formula.

Navy Body Fat Calculator

Estimate body fat using US Navy circumference method.

Max Heart Rate Calculator

Estimate maximum heart rate by age.

Karvonen Heart Rate Calculator

Target heart rate from max HR and resting HR.

Ideal Body Weight Calculator

Devine formula ideal body weight estimate.

Macronutrient Split Calculator

Split daily calories into protein, carbs, and fat grams.

Body Fat Skinfold Calculator

Estimate body fat from chest, abdomen, and thigh skinfolds (male).

Bulking Calorie Surplus Calculator

Daily calories for lean bulk from maintenance and surplus.

Macro Magnification Calculator

Microscope magnification from objective and tube focal lengths.

Rowing Weight Adjustment Calculator

Adjust erg time for body weight using Concept2 formula.

Pet Health

Cat Daily Calorie Calculator

Daily calorie needs for cats by weight and activity.

Dog Daily Calorie Calculator

Daily calorie needs for dogs by weight and activity.

Dog Ideal Weight Calculator

Ideal weight range from current weight and body condition score.

Frequently Asked Questions
How to Use

About the Medical Calculators

What it calculates

This medical calculators applies a validated clinical scoring method used in healthcare settings. Browse medical calculators.

When to use it

Use as a clinical decision support aid alongside professional judgment — not as a standalone diagnosis.

Example

Adjust the inputs above to model your specific scenario with the Medical Calculators.

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