🎯 Our Mission
StaminaCalculator.com was built with one simple goal: give every American free access to the same health assessment tools that fitness professionals and sports medicine clinics charge hundreds of dollars for.
We believe that understanding your body — your stamina, body composition, cardiovascular fitness, and caloric needs — should not require a gym membership, a personal trainer, or a doctor's appointment. It should be free, instant, and private.
Always Free
No subscriptions, no premium tiers, no hidden costs. Ever.
Science-Backed
Every formula sourced from peer-reviewed research and clinical guidelines.
Privacy First
All calculations happen in your browser. We store nothing.
Instant Results
No waiting, no sign-up, no email required. Results in seconds.
🧮 Our Free Health Calculators
We offer 10 science-backed health and fitness calculators, all completely free:
📚 Our Scientific Sources
Every calculator on StaminaCalculator.com is built using formulas and reference ranges from the most respected health and fitness organizations in the United States:
- Centers for Disease Control and Prevention (CDC) — BMI classifications, physical activity guidelines
- American College of Sports Medicine (ACSM) — VO2 max norms, exercise testing guidelines (11th Edition)
- American Heart Association (AHA) — Heart rate zone recommendations, cardiovascular health standards
- National Institutes of Health (NIH) — Hydration guidelines, body composition research
- National Academies of Medicine — Daily water intake reference values
- American Council on Exercise (ACE) — Body fat percentage norms by age and sex
- World Health Organization (WHO) — Waist-to-hip ratio risk thresholds
- Mifflin-St Jeor (1990) — Caloric needs equation, validated in JADA
- Kline et al. (1987) — Rockport Walk Test VO2 max formula
- US Navy Circumference Method — Body fat estimation validation studies
👥 Who We Are
StaminaCalculator.com is an independent health information website based in the United States. We are a small team passionate about making health literacy accessible to everyone.
Our team includes health enthusiasts, fitness researchers, and web developers who believe that good health information should be available to all — not just those who can afford professional consultations.
We are not a medical practice, hospital, or healthcare provider. Our tools are for informational and educational purposes only. Always consult a qualified healthcare professional for medical decisions.
⚠️ Medical Disclaimer
All calculators and content on StaminaCalculator.com are for informational and educational purposes only. They do not constitute medical advice, diagnosis, or treatment. Results are estimates based on general population data and validated scientific formulas.
Individual results may vary based on factors not captured by our calculators. Always consult a qualified healthcare professional, physician, or certified fitness specialist before making health-related decisions, beginning a new exercise program, or changing your diet.
Ready to Discover Your Stamina Score?
Take our free 2-minute stamina assessment and get your personal score out of 100 with a detailed breakdown and improvement plan.
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