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Free Science-Based Health Calculators

Complete collection of professional-grade health assessment tools with instant, scientifically-validated results.

Evidence-based formulas
No email required
Instant results
Completely free
Explore
🔥

Calorie & Macro Calculator

Calculate daily calories and macros using the scientifically-proven Mifflin-St Jeor Equation. Perfect for weight loss, muscle gain, or maintenance goals.

  • Validated Mifflin-St Jeor formula
  • Goal-specific adjustments
  • Complete macro breakdown
  • Activity level calculations
📏

BMI Calculator

Calculate BMI with medical-grade accuracy using WHO standards. Get health category insights and personalized recommendations for your optimal weight range.

  • Metric & imperial units
  • WHO health categories
  • BMI chart visualization
  • Health recommendations
📊

Body Fat Calculator

Estimate body fat percentage using the scientifically-validated US Navy method. Get accurate results without expensive equipment or DEXA scans.

  • US Navy method
  • Gender-specific formulas
  • Body fat categories
  • Health insights included
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Ideal Weight Calculator

Find your ideal weight range using four proven medical formulas: Devine, Robinson, Miller, and Hamwi methods. Compare results to set realistic health goals.

  • 4 proven medical formulas
  • Weight range calculation
  • Formula comparison chart
  • Health goal setting
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Water Intake Calculator

Calculate daily water needs based on weight, activity level, and climate. Get personalized hydration recommendations with helpful timing guidelines.

  • Activity adjustments
  • Climate considerations
  • Daily hydration timeline
  • Bottle/glass conversions
🧬

Protein Calculator

Determine optimal daily protein intake based on fitness goals, activity level, and body composition. Includes meal planning suggestions and protein sources.

  • Goal-based recommendations
  • Meal timing suggestions
  • Protein source guide
  • Sample meal plans
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Stress Level Assessment

Measure perceived stress levels using the scientifically-validated PSS-10 scale. Get personalized stress management recommendations and coping strategies.

  • PSS-10 validated scale
  • Stress category assessment
  • Management recommendations
  • Coping strategy guidance
😴

Sleep Quality Assessment

Evaluate sleep quality using the Pittsburgh Sleep Quality Index (PSQI). Assess 7 components of sleep health and get improvement recommendations.

  • PSQI validated assessment
  • 7-component analysis
  • Sleep efficiency calculation
  • Improvement strategies
🏢

Work-Life Balance Assessment

Assess work-life balance across 8 key dimensions. Get personalized recommendations for achieving better life harmony and reducing burnout risk.

  • 8-dimension assessment
  • Burnout risk evaluation
  • Balance recommendations
  • Wellbeing strategies

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