Health & Wellness

Health Calculators

Calculate BMI, ideal weight, pregnancy due date, ovulation, water intake, and body type instantly.Track your wellness journey — 100% free, no sign-up required

✓ Trusted by 200,000+ users✓ Used in 80+ countries✓ WHO standard formulas✓ No data storage
🩺 9+ health calculators available — all free, all accurate

Why Use Numrexo Health Calculators?

Our health calculators are designed for health-conscious individuals, expecting mothers, fitness enthusiasts, and medical professionals. Each tool uses standard formulas from WHO (World Health Organization) and leading medical research.

The BMI Calculator uses WHO standards to assess weight status (underweight, normal, overweight, obese). This helps you understand if your weight falls in a healthy range for your height.

Our Pregnancy Due Date Calculator estimates your baby's arrival date based on the first day of your last menstrual period or conception date. Perfect for expectant mothers planning prenatal care and preparations.

The Ovulation Calculator helps track fertile days for family planning. Enter your cycle length and last period date to identify your most fertile window.

The Water Intake Calculator recommends daily hydration needs based on weight, activity level, and climate. The Ideal Weight Calculatorgives healthy weight ranges using multiple formulas (Devine, Robinson, Miller).

100% free, no registration, no data collection. All calculations happen in your browser — your health data stays private and secure.

Popular Health Calculations

  • BMI Calculator: Body Mass Index per WHO standards
  • Pregnancy Due Date: Estimate baby's arrival (Naegele's Rule)
  • Ovulation Tracker: Identify fertile days for family planning
  • Ideal Weight: Healthy weight range for your height
  • Water Intake: Daily hydration needs based on lifestyle
  • Body Type Calculator: Determine body shape (pear, apple, hourglass)
  • Sleep Timing: Optimal bedtime based on wake-up time
  • Nutrition Facts: Track calories and nutrients

Medical Standards Used

WHO BMI ClassificationNaegele's Rule (Due Date)Devine Formula (Ideal Weight)Robinson FormulaMiller Formula

💡 Pro Tip: Track your BMI and water intake together for better health outcomes. Even small improvements in hydration can boost energy, skin health, and digestion. For pregnancy planning, use our Ovulation Calculator consistently for 2-3 months to understand your unique cycle pattern.

Disclaimer: These calculators provide estimates based on standard medical formulas. Individual results may vary. Always consult a qualified healthcare provider for medical advice, especially during pregnancy.

Related:All Calculators •Fitness Calculators •Nutrition Tools

🏥 WHO & Naegele's Rule standards | Results are estimates — consult your doctor