Accurate, free health calculators used by patients, students, and healthcare professionals. No sign-up. No fees. Just results.
Select any tool below to get instant, accurate medical calculations.
Calculate your Body Mass Index and understand what it means for your health.
Find your ideal body weight range using multiple medical formulas.
Estimate your body fat percentage using the U.S. Navy circumference method.
Find your Basal Metabolic Rate — calories your body burns at rest.
Calculate your daily caloric needs based on activity level and goals.
Calculate how much water you should drink daily for optimal hydration.
Trusted health tools built with medical accuracy in mind.
Real-time calculations as you type. No loading screens, no waiting.
All formulas are based on established medical guidelines and peer-reviewed research.
Each tool includes explanations of what the result means and when to consult a doctor.
Medical Disclaimer: The calculators and tools on Medeeva are for informational and educational purposes only. They are not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider.