Free Medical Calculators – BSA, BMI & More

Free, easy-to-use medical calculators built for patients, doctors, pharmacists, nurses, and paramedical staff — evidence-based and simple to understand.

Body Surface Area (BSA) Calculator

Calculate BSA using the Mosteller formula — for adults and children.

Calorie Calculator (BMR & TDEE)

Calculate your BMR and TDEE using the Mifflin-St Jeor formula — includes daily calorie targets for weight loss or gain.

More calculators coming soon