BMI Calculator - Calculate Your Body Mass Index Online
Free BMI calculator to calculate your Body Mass Index instantly. Check your weight category (underweight, normal, overweight, obese) based on WHO standards. Works with kg/lbs and cm/ft/in units worldwide.
How to Use
Use Cases
- Health Monitoring: Calculate BMI to monitor your body weight and health status regularly.
- Fitness Goals: Track BMI as part of your fitness journey and weight management goals.
- Medical Screening: Use BMI as a screening tool to assess body fat (consult healthcare professional for diagnosis).
- General Use: Calculate BMI for personal health awareness and wellness tracking.
Accuracy Disclaimer
This BMI calculator provides results based on standard BMI formulas. BMI is a screening tool and not a diagnostic tool. Results may not be accurate for athletes with high muscle mass, pregnant women, or elderly individuals. Always consult a healthcare professional for medical advice and personalized assessment.
Frequently Asked Questions
Related Tools
Common BMI Calculations
70 kg, 175 cm
Answer: BMI = 22.9 (Normal weight)
Calculation: 70 / (1.75)² = 22.9
80 kg, 170 cm
Answer: BMI = 27.7 (Overweight)
Calculation: 80 / (1.70)² = 27.7
60 kg, 165 cm
Answer: BMI = 22.0 (Normal weight)
Calculation: 60 / (1.65)² = 22.0
55 kg, 160 cm
Answer: BMI = 21.5 (Normal weight)
Calculation: 55 / (1.60)² = 21.5
90 kg, 180 cm
Answer: BMI = 27.8 (Overweight)
Calculation: 90 / (1.80)² = 27.8
50 kg, 165 cm
Answer: BMI = 18.4 (Underweight)
Calculation: 50 / (1.65)² = 18.4
BMI Limitations
While BMI is a useful screening tool, it has limitations and may not accurately reflect body composition for everyone:
- Athletes: High muscle mass can result in a higher BMI, even with low body fat
- Elderly: Age-related muscle loss may affect BMI accuracy
- Pregnant women: BMI calculations are not applicable during pregnancy
- Children and teens: Requires age and sex-specific percentile charts
- Body composition: BMI doesn't distinguish between muscle and fat
For a comprehensive health assessment, consider additional factors like waist circumference, body fat percentage, muscle mass, and overall fitness level. Always consult healthcare professionals for personalized medical advice.
Tips for Maintaining a Healthy BMI
Balanced Diet
Eat a variety of nutritious foods in appropriate portions
Regular Exercise
Engage in physical activity for at least 150 minutes per week
Adequate Sleep
Aim for 7-9 hours of quality sleep per night
Stay Hydrated
Drink plenty of water throughout the day
Note: These are general tips. Consult healthcare professionals for personalized health and fitness advice.
About BMI Calculator
Our free online BMI calculator helps you calculate your Body Mass Index instantly. BMI is a measure of body fat based on height and weight, commonly used as a screening tool to assess health risks associated with weight.
This BMI calculator follows WHO standards and works for users worldwide. It supports multiple units: weight in kilograms (kg) or pounds (lbs), and height in centimeters (cm), feet (ft), or inches (in). The calculator automatically converts all units to the standard metric system for accurate BMI calculation.
All calculations happen locally in your browser, ensuring complete privacy. No data is stored or transmitted. The tool is completely free to use with no registration required. Works perfectly on mobile devices, tablets, and desktops.
Important Disclaimer: BMI is a screening tool, not a diagnostic tool. It provides a general indication of weight status but does not account for individual variations in body composition, muscle mass, bone density, or other health factors. Always consult a healthcare professional for comprehensive health assessments and personalized medical advice.