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Weight & Body
Calculate BMI, body fat, ideal weight and more
Calories & Metabolism
BMR, TDEE, calorie deficit and surplus calculators
Nutrition & Diet
Macros, protein, water, fiber and diet planning
Fitness & Exercise
One rep max, VO2 max, heart rate zones and more
Sleep
Sleep cycles, debt, bedtime and nap calculators
Women & Reproductive Health
Pregnancy, ovulation, fertility and period tracking
Medical & Clinical
Blood pressure, sugar, cholesterol and clinical tools
Mental & Lifestyle
Stress, anxiety, mood, screen time and wellness
Age & Longevity
Biological age, heart age, longevity estimators
Baby & Kids
Baby age, child BMI, feeding, vaccines and development
Sports & Performance
Marathon pace, cycling FTP, swim pace and race time
Diabetes & Blood Sugar
Glucose converters, A1C, insulin and diabetes risk tools
Heart & Cardiovascular
Heart risk scores, pulse pressure and cardiac health tools
Men's Health
Testosterone, prostate, fertility and male wellness calculators
Respiratory Health
Lung capacity, peak flow and breathing health calculators
Bone & Joint Health
Fracture risk, calcium, joint pain and bone density tools
Senior Health
Fall risk, sarcopenia, cognitive and grip strength tools
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Built with accuracy, privacy, and simplicity in mind
Science-Backed
Every calculator uses validated medical formulas trusted by clinicians worldwide.
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Works Everywhere
Use on any device, install as an app, and it works offline · health tools wherever you are.
Built for You
Accuracy and simplicity, always
100% Free
Every tool is completely free. No hidden costs, no subscriptions, ever.
Science-Backed
All calculations use validated medical formulas and clinical guidelines.
Mobile Friendly
Optimized for all devices: phone, tablet, or desktop.
Privacy First
No data stored, no accounts needed. Your health data stays with you.
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