⚕️ Science-Backed & 100% Free
Free Health Tools & Calculators
21+ professional-grade tools to understand your body, track your health, and make smarter decisions - zero signup required.
🔮 Medical-Grade Formulas
🔒 No Data Stored
⚡ Instant Results
📱 Works on All Devices
🅾 Always Free
Fitness & Body
5 tools🔥 Most Popular
Calculate your Body Mass Index instantly. Metric and imperial supported with full healthy weight range guidance.
Estimate body fat percentage using the proven U.S. Navy method. See your fat mass, lean mass, and fitness category.
Find your daily calorie needs (TDEE) for weight loss, maintenance, or muscle gain with full macro breakdown.
✨ NewAdvanced Total Daily Energy Expenditure calculator with activity multipliers, BMR, and personalized calorie targets.
✨ NewFind your optimal heart rate zones for fat burn, cardio fitness, and peak workout performance.
Nutrition & Diet
4 toolsFind how much water you need daily based on weight, activity level, and climate conditions.
✨ NewCalculate your daily hydration and electrolyte needs for optimal performance, recovery, and wellness.
✨ NewPersonalized ketogenic diet macro calculator. Get your exact fat, protein, and carb targets for ketosis.
✨ NewDiscover which vitamins and supplements your body needs most based on your lifestyle, diet, and health goals.
Health Monitoring
6 tools🔥 Most Popular
Enter your reading to instantly know if blood pressure is normal, elevated, or high - with personalized action advice.
🔥 Most PopularCheck if your glucose is normal, prediabetic, or diabetic. Fasting, post-meal, and HbA1c values supported.
✨ NewAssess your type 2 diabetes risk based on lifestyle, family history, and health metrics. Includes A1C converter.
✨ NewDiscover your real biological age vs. chronological age and learn how your lifestyle affects how fast you age.
✨ NewEstimate your Blood Alcohol Concentration based on drinks consumed, body weight, and time elapsed.
✨ NewEstimate health insurance and Medicare premium costs based on your age, income, location, and plan type.
Women's Health
3 toolsMental & Lifestyle
3 tools✨ New
Calculate your cumulative sleep debt and discover how many recovery nights you need to feel fully restored.
✨ NewFind out if therapy could help you by answering guided questions about mental health, stress, and wellbeing.
✨ NewAssess your hair loss stage and get personalized treatment recommendations based on your pattern.
Frequently Asked Questions
Are all these health tools really free? +
Yes, 100% free - no signup, no subscription, no hidden fees. Use them as many times as you want.
How accurate are these health calculators? +
Our tools use established medical formulas: Mifflin-St Jeor for metabolic rate, U.S. Navy method for body fat, and WHO standards for BMI - the same formulas used by healthcare professionals worldwide.
Do you store my health data? +
No. Everything runs in your browser. We never collect, store, or transmit your personal health data. Your privacy is 100% protected.
Do these tools work on mobile devices? +
Yes! All 21 tools are fully responsive and optimized for smartphones, tablets, and desktops.
Can these tools replace medical advice? +
No. These tools are for educational purposes only and are not a substitute for professional medical advice, diagnosis, or treatment. Always consult your healthcare provider.
⚠️ Medical Disclaimer: All tools are for educational and informational purposes only and are not a substitute for professional medical advice, diagnosis, or treatment. Results are estimates based on population averages and validated medical formulas. Always consult your qualified healthcare provider for personalized health guidance.