Your health deserves more than guesswork. Whether you’re a medical professional, fitness lover, or someone who wants to take better care of yourself, our wide range of free online health & fitness calculators offer expert-backed tools to guide your journey.

From BMI, body fat, and sleep needs to complex scores like MELD or CURB-65, our calculators are built on trusted medical formulas and scientific research. Need help dosing medication for a child or estimating your protein intake? We’ve got that too. These tools are your starting point toward smarter, data-driven health decisions. Always consult your doctor, but start here.