About Fitness Calculator
Free, accurate fitness calculators to help you reach your health goals
Our Mission
At Fitness Calculator, our mission is simple: make health and fitness calculations accessible to everyone, for free. We believe that understanding your body's metrics—like BMI, calorie needs, and body fat percentage—shouldn't require expensive apps or complicated spreadsheets.
Whether you're starting your fitness journey, fine-tuning your nutrition, or just curious about health metrics, our calculators are designed to give you quick, accurate results you can understand.
What We Offer
BMI Calculator
Calculate your Body Mass Index and understand what it means for your health.
Body Fat Calculator
Estimate your body fat percentage using the U.S. Navy method.
Calorie Calculator
Find out how many calories you need daily based on your goals.
Plus: Ideal Weight, Macro Calculator, Protein Intake, and Water Intake calculators!
Why Choose Us?
- ✓100% Free: No subscriptions, no hidden fees, no paywalls. All our calculators are completely free to use.
- ✓Privacy First: We don't store your health data. All calculations happen in your browser, so your information stays private.
- ✓Evidence-Based: Our calculators use scientifically validated formulas like Harris-Benedict, Mifflin-St Jeor, and the U.S. Navy body fat method.
- ✓Easy to Use: Simple, clean interfaces that get you results in seconds. No confusing jargon or complicated steps.
- ✓Mobile-Friendly: Use our calculators on any device—phone, tablet, or desktop.
Our Values
Transparency
We explain the formulas we use and the science behind our calculators. No black boxes, no mystery algorithms.
Accuracy
We use established, peer-reviewed formulas and double-check our calculations to ensure reliable results.
Education
We don't just give you numbers—we help you understand what they mean and how to use them to reach your goals.
No Medical Claims
We're clear that our calculators are educational tools, not medical advice. Always consult healthcare professionals for personalized guidance.
Important Disclaimer
Our calculators provide estimates based on standard formulas. Individual results can vary significantly based on factors like genetics, medical conditions, medications, and lifestyle. Always consult with qualified healthcare providers (doctors, dietitians, certified trainers) before making significant changes to your diet, exercise, or health routines based on calculator results.
Questions or Feedback?
We're always working to improve our calculators and add new features. If you have suggestions, found a bug, or just want to say hi, we'd love to hear from you!