Understand Your Body Mass Index

Our BMI calculator uses the standard WHO formula and is accurate to within 0.1 BMI points. All calculations are performed locally in your browser - we never store or transmit your personal data. The calculator supports both metric (cm/kg) and imperial (inches/lbs) units.

BMI Calculator: Uses only height and weight to estimate body fat. Quick and easy but doesn't distinguish between muscle and fat.

Body Fat Calculator: Uses the U.S. Navy Method with neck, waist, and hip measurements to provide a more accurate body composition estimate. This is better for athletes and fitness enthusiasts.

Our calorie calculator uses three scientifically validated formulas:

• Mifflin-St Jeor: Most accurate for general population
• Harris-Benedict: Traditional formula, good for reference
• Katch-McArdle: Most accurate if you know your body fat %

It calculates your BMR (Basal Metabolic Rate) and TDEE (Total Daily Energy Expenditure) based on your activity level and goals.

No, never! We take your privacy seriously:

• All calculations happen in your browser - we never see your data
• No accounts required to use calculators
• We don't track or store your height, weight, or age
• Cookie usage is only for site functionality and anonymous analytics

Read our Privacy Policy for details.

We use minimal cookies:

• Essential: Remember your unit preference (metric/imperial)
• Analytics: Anonymous usage data to improve the site
• AdSense: For showing relevant ads (you can opt-out via Google)

You can disable cookies in your browser settings, though some features may not work properly.

Absolutely! Our site is fully responsive and works great on all devices. You can also install it as a PWA (Progressive Web App):

• iPhone: Share menu → "Add to Home Screen"
• Android: Menu → "Install App"
• Desktop: Install button in browser address bar

Once installed, it works offline and feels like a native app!

Yes! Our Articles section links directly to:

• CDC (Centers for Disease Control)
• Mayo Clinic
• World Health Organization (WHO)
• Harvard Health
• NHS UK
• American Heart Association
• Johns Hopkins Medicine
• National Institutes of Health (NIH)

We don't write our own articles - we curate the best content from trusted medical institutions.

Ads help us keep all our calculators free for everyone. We use Google AdSense which:

• Shows relevant, non-intrusive ads
• Respects your privacy (no personal data shared)
• Allows you to customize ad preferences

You can learn more about how Google uses data at Google's Privacy Policy.

Our calculators are updated regularly:

• Formulas: Based on latest medical research (WHO guidelines)
• Code: Continuous improvements for accuracy
• Content: Articles curated monthly for freshness
• Last major update: January 2025

We're here to help! You can reach us through:

• 📧 Email: support@bmicalculator.example.com
• 📝 Contact Form: Visit our Contact Page
• 🐛 Report Issues: Technical problems? Let us know!

Response times: Typically within 24-48 hours on business days.

Key points from our Terms of Service:

• Free to use for everyone
• Tools are for informational purposes only
• Not a substitute for professional medical advice
• We're not liable for health decisions based on our tools
• You must be 13+ to use this site

No! BMI is just one screening tool. For a complete health picture, consider:

• Our Body Fat Calculator: More accurate body composition
• Waist circumference: Measures abdominal fat
• Blood tests: Cholesterol, blood sugar, etc.
• Fitness level: Strength, endurance, flexibility
• Mental wellbeing: Stress, sleep, mood

Always consult healthcare providers for personalized advice.