🧮 BMI Calculator
Calculate your Body Mass Index with instant health insights
Measurement Unit
Calculate Your BMI
Body Mass Index (BMI) is a simple measure to assess if you have a healthy body weight for your height.
About BMI Calculator
Common Use Cases
- Calculate your Body Mass Index
- Track health metrics
- Monitor fitness progress
Tips & Best Practices
- Instant calculation
- Health insights included
- Track your progress
Why Use Our BMI Calculator?
- Free and instant: No registration or sign-up required
- Privacy-focused: All processing happens in your browser - your data never leaves your device
- Fast and reliable: Works on all devices, even with slow internet connections
- No ads or tracking: Clean interface without distractions
- Mobile-friendly: Optimized for use on smartphones and tablets
How It Works
Our BMI Calculator runs entirely in your web browser using modern JavaScript. This means:
- No data is sent to our servers
- All calculations and processing happen locally on your device
- Your information remains completely private
- The tool works even when offline (after first load)
Frequently Asked Questions
Is this tool free to use?
Yes, absolutely! All tools on TinkerHub are completely free. No registration, no subscriptions, no hidden fees.
Do you store my data?
No. All processing happens in your browser. We don't collect, store, or transmit any of your data. Your privacy is our priority.
Can I use this on mobile?
Yes! Our tools are fully responsive and work perfectly on smartphones, tablets, and desktop computers.
Understanding BMI (Body Mass Index)
What is BMI?
BMI (Body Mass Index) is a measure of body fat based on height and weight. It's calculated by dividing your weight in kilograms by your height in meters squared (kg/m²). BMI is a widely used screening tool to identify potential weight problems in adults.
BMI Categories
- Underweight: BMI less than 18.5
- Normal weight: BMI 18.5 to 24.9
- Overweight: BMI 25 to 29.9
- Obese: BMI 30 or higher
How to Use This BMI Calculator
- Select your preferred measurement unit (Metric or Imperial)
- Enter your height in the appropriate unit
- Enter your weight in the appropriate unit
- Click "Calculate BMI" to get your result
- Review your BMI category and health insights
Important Notes
While BMI is a useful screening tool, it doesn't directly measure body fat. It may not be accurate for:
- Athletes with high muscle mass
- Older adults who have lost muscle mass
- Pregnant or breastfeeding women
- Children and teenagers (different BMI charts apply)
Always consult with a healthcare provider for personalized health advice.
Why Use Our BMI Calculator?
- Free and instant: No registration required
- Accurate calculations: Supports both metric and imperial units
- Health insights: Get detailed BMI category information
- Mobile-friendly: Works perfectly on all devices
- Privacy-focused: All calculations are done locally, no data stored