Health calculators help you measure your body stats, track fitness progress, and understand your overall health. Use our free online tools to calculate BMI, body fat, BMR, ideal weight, calories, water intake, heart rate, and more.
All tools are built for fast, accurate results — perfect for fitness tracking, weight management, and improving daily wellness.
Check your Body Mass Index instantly.
Find your healthy weight range based on your height.
Estimate your body fat percentage.
See healthy body fat ranges by age and gender.
Calculate your lean body mass using multiple formulas.
Calculate your body surface area quickly.
Find your max and target heart rate zones.
Calculate your daily water requirements.
Estimate your daily calorie needs.
Calculate your daily protein, carb, and fat targets.
Estimate your cardiovascular fitness level.
Calculate your basal metabolic rate (daily metabolism).
All-in-One Health Calculators
Our health calculators help you measure body composition, track fitness progress, estimate calorie needs, and improve daily wellness. These tools are ideal for athletes, beginners, and anyone looking to monitor their health.
Popular Health & Fitness Categories
- Body Composition: BMI, Body Fat, Ideal Weight, Lean Body Mass
- Health Metrics: BMR, BSA, Heart Rate
- Daily Wellness: Water Intake, Calorie Calculator, Macros
- Performance: VO2 Max Calculator
Why Use Health Calculators?
Health calculators remove guesswork and help you make informed decisions about your body, diet, and fitness goals. They offer instant, accurate results without any complicated formulas.
Fast. Accurate. Easy to Use.
All CalcsLab health tools are mobile-optimized and deliver results in real time.
Health Calculators – FAQs
Are these health calculators free?
Yes. All health calculators on CalcsLab are completely free.
Do these tools work on mobile?
Yes. Every calculator is fully responsive and mobile-friendly.
What can I calculate with health tools?
You can calculate BMI, body fat, BMR, ideal weight, calories, water intake, heart rate, VO2 max, and more.
Do I need an account to use the tools?
No. All health calculators work instantly without signup.