BMI Calculator & Health Tracker
Calculate your Body Mass Index, track your progress, and get personalized health insights
Normal range: 140-220 cm
Normal range: 30-200 kg
• Formula: BMI = weight (kg) / height² (m²)
• Results based on WHO guidelines
• Calculations are saved to your history
Congratulations! You're in the healthy weight range. Maintain your current lifestyle.
High health risk
Some health risk
Minimal health risk
Increased health risk
High health risk
Very high health risk
Extremely high health risk
• BMI is a screening tool to categorize weight status
• Calculated using height and weight measurements only
• Widely used by healthcare professionals worldwide
• Most accurate for adults aged 18-65 years
• Should be used alongside other health assessments
• Not a direct measure of body fatness
• Doesn't distinguish between muscle and fat mass
• May not be accurate for athletes or muscular individuals
• Not suitable for pregnant women or children
• May be less accurate for elderly adults
• Doesn't account for bone density variations
• Individual body composition differences exist
• Maintain a balanced, nutritious diet
• Engage in regular physical activity
• Stay hydrated throughout the day
• Get adequate sleep (7-9 hours nightly)
• Manage stress through healthy activities
• Consult healthcare providers for personalized advice
Understanding your body mass index (BMI) is the first step in health assessment and weight management. Our calculator provides instant, accurate BMI calculations with detailed category explanations and health recommendations, helping you make informed decisions about your wellness journey.
⚡ Instant results - Calculate BMI in real-time as you type
🌍 Dual units - Supports both metric (kg/cm) and imperial (lb/in) systems
📊 Health categories - Clear classification with color-coded ranges
📈 Healthy weight range - Shows your ideal weight targets
💡 Health insights - Personalized recommendations based on results
📱 Mobile friendly - Track BMI on any device
BMI Limitations
BMI doesn't account for muscle mass, bone density, or body composition. Athletes may have high BMI despite low body fat. Use BMI as one indicator among many, not a definitive health measure.
Track Trends, Not Single Values
Monitor BMI changes over time rather than obsessing over one reading. Monthly tracking reveals meaningful trends while daily variations from water retention, food intake, and time of day are normal.
Combine with Waist Measurement
Measure waist circumference alongside BMI for better health assessment. Waist measurement indicates visceral fat distribution, which impacts health risks more than BMI alone. Men >102cm, women >88cm indicates increased risk.
Healthy Weight Loss Pace
Aim for 0.5-1kg (1-2lbs) weight loss per week for sustainable results. Rapid weight loss often leads to muscle loss and rebound. Calculate target BMI, then work backward to set realistic timelines.
Consult Professionals
BMI calculators provide screening, not diagnosis. Consult healthcare providers for comprehensive assessment including body fat percentage, blood work, and personal health factors before major lifestyle changes.
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Free BMI Calculator & Healthy Weight Chart
Our comprehensive BMI (Body Mass Index) calculator helps you assess your weight status and provides personalized health insights. Calculate your BMI instantly, discover your healthy weight range, and track your progress over time with our advanced health tracking features.
What is BMI and Why is it Important?
Body Mass Index (BMI) is a widely-used health assessment tool that estimates body fat based on height and weight measurements. Developed by Belgian statistician Adolphe Quetelet, BMI provides a quick screening method to categorize individuals into weight status categories that may indicate health risks.
BMI Categories and Health Risk Assessment
| BMI Range | Category | Health Risk | Recommendations |
|---|---|---|---|
| Below 16 | Severely Underweight | High Risk | Immediate medical consultation required |
| 16.0 - 18.4 | Underweight | Some Risk | Nutritional counseling, weight gain plan |
| 18.5 - 24.9 | Normal Weight | Minimal Risk | Maintain current healthy lifestyle |
| 25.0 - 29.9 | Overweight | Increased Risk | Diet modification, increased physical activity |
| 30.0 - 34.9 | Obesity Class I | High Risk | Medical consultation, structured weight loss program |
| 35.0 - 39.9 | Obesity Class II | Very High Risk | Medical supervision, consider weight loss interventions |
| 40.0+ | Obesity Class III | Extremely High Risk | Immediate medical intervention, potential surgical options |
Frequently Asked Questions About BMI
What is BMI and how is it calculated?
BMI (Body Mass Index) is calculated by dividing your weight in kilograms by the square of your height in meters (kg/m²). For imperial units, the formula is: (weight in pounds / (height in inches)²) × 703. Our calculator automatically handles both metric and imperial conversions for your convenience.
Is BMI an accurate measure for everyone?
BMI is a useful screening tool but has limitations. It doesn't distinguish between muscle and fat mass, so athletes or people with high muscle mass may have elevated BMI scores despite being healthy. It's also less accurate for elderly adults, pregnant women, and growing children. Always consult healthcare professionals for comprehensive health assessments.
What are the limitations of BMI?
BMI doesn't account for muscle mass, bone density, body composition, or fat distribution. It may incorrectly classify muscular individuals as overweight, and doesn't distinguish between subcutaneous and visceral fat. Additional measurements like waist circumference, body fat percentage, and overall health markers provide a more complete picture.
How often should I calculate my BMI?
For general health monitoring, calculating BMI monthly or quarterly is sufficient. If you're actively working on weight management, weekly calculations can help track progress. Our BMI calculator includes a history feature to help you monitor trends over time, which is more valuable than single measurements.
What should I do if my BMI indicates health risks?
If your BMI falls outside the normal range, consult with a healthcare provider for personalized advice. They can assess your overall health, consider your medical history, and recommend appropriate interventions. Remember, BMI is just one health indicator among many, and should be evaluated alongside other factors.
Can BMI be used for children and teenagers?
BMI calculations for children and teens (ages 2-19) use age and sex-specific percentiles rather than standard adult categories, as body fat changes with age and differs between boys and girls during growth. Pediatric BMI should always be interpreted by healthcare professionals familiar with childhood development patterns.
Achieving and Maintaining a Healthy Weight
Healthy Weight Management Tips
- • Eat a balanced diet rich in fruits, vegetables, and whole grains
- • Control portion sizes and practice mindful eating
- • Stay hydrated with adequate water intake
- • Engage in regular physical activity (150+ minutes weekly)
- • Get 7-9 hours of quality sleep each night
- • Manage stress through healthy coping strategies
- • Limit processed foods and added sugars
- • Monitor progress with tools like our BMI calculator
When to Seek Professional Help
- • BMI consistently outside normal range
- • Rapid weight changes (gain or loss)
- • Difficulty maintaining healthy habits
- • Underlying health conditions affecting weight
- • Eating disorders or unhealthy relationships with food
- • Need for personalized nutrition or exercise plans
- • Family history of weight-related health issues
- • Questions about appropriate weight goals
Health Disclaimer
This BMI calculator is provided for educational and informational purposes only. Results should not replace professional medical advice, diagnosis, or treatment. Always consult qualified healthcare providers for personalized health assessments and recommendations. Individual health needs vary significantly, and BMI is just one of many health indicators.