Professional health and fitness calculators with scientifically accurate results. No ads, no registration required - just pure, reliable health calculations.
Choose from our comprehensive suite of ad-free, scientifically accurate health calculators
Calculate your Body Mass Index and health classification
Calculate daily caloric needs based on your lifestyle
Estimate body fat percentage using Navy method
Calculate target heart rate zones for exercise
Calculate running/walking pace and times
Calculate pregnancy due date and milestones
Track healthy pregnancy weight gain
Calculate daily protein requirements
Calculate daily water needs
Total Daily Energy Expenditure
Calculate body surface area using DuBois formula
Calculate lean body mass using Boer formula
Completely ad-free experience with full-width calculators and distraction-free calculations.
All our formulas are based on peer-reviewed medical research and validated calculations.
No personal data is stored. All calculations are performed locally in your browser.
Responsive design that works perfectly on all devices and screen sizes.
Get immediate calculations with color-coded health classifications and recommendations.
Support for both metric and imperial units with automatic conversion capabilities.
Learn what BMI means, its limitations, and how to interpret your results in the context of overall health and body composition.
Discover how calories work in your body and how to use this information for healthy weight management and energy balance.
Understand the difference between weight and body composition, and why body fat percentage matters more than scale weight.
Learn how to use heart rate zones for optimal training, fat burning, and cardiovascular fitness improvement.
Get informed about healthy pregnancy weight gain, prenatal nutrition, and important milestones during pregnancy.
Understand macronutrients, hydration needs, and how to calculate your daily nutritional requirements.