BMI Calculator
Compute Body Mass Index and see your category.
Notes
BMI is a general guideline and may not reflect body composition for athletes or certain populations.
About this BMI Calculator
Calculate Body Mass Index (BMI) and view your category with support for both metric and imperial units. Our BMI calculator provides accurate BMI calculations along with category classifications (underweight, normal weight, overweight, obese). Perfect for tracking health metrics, understanding weight status, or monitoring fitness progress. The tool supports easy unit switching between metric (kg, cm) and imperial (lbs, ft/in) measurements.
Key Features
Calculate BMI using weight and height
Support for metric (kg, cm) and imperial (lbs, ft/in) units
BMI category classification (underweight, normal, overweight, obese)
Easy unit switching
Visual BMI category indicators
Accurate calculations based on standard BMI formula
Real-time BMI updates
Works entirely in your browser for privacy
How to Use
Select your preferred unit system (metric or imperial)
Enter your weight in the weight field
Enter your height in the height field
View your calculated BMI automatically
Check your BMI category classification
Review health recommendations if provided
Switch units to compare measurements
Popular Use Cases
Track health and fitness metrics
Monitor weight status and changes
Understand BMI categories for health awareness
Calculate BMI for health assessments
Track fitness progress over time
Understand weight-related health indicators
Calculate BMI for medical or insurance purposes
Monitor BMI for health and wellness goals
Tips & Best Practices
Use accurate weight and height measurements for best results
BMI is a screening tool, not a diagnostic measure
Consider consulting healthcare professionals for health advice
BMI categories are general guidelines
Track BMI over time to monitor changes
Use consistent units for accurate comparisons
Remember that BMI doesn't account for muscle mass or body composition
Frequently Asked Questions
What is BMI?
BMI (Body Mass Index) is a measure of body fat based on height and weight. It's calculated as weight divided by height squared (kg/m² or lbs/in² × 703).
What do BMI categories mean?
BMI categories: Underweight (<18.5), Normal weight (18.5-24.9), Overweight (25-29.9), Obese (≥30). These are general guidelines and may vary by individual factors.
Is BMI accurate for everyone?
BMI is a screening tool but doesn't account for muscle mass, bone density, or body composition. Athletes with high muscle mass may have higher BMI despite being healthy.
Can I switch between metric and imperial units?
Yes, the calculator supports easy switching between metric (kg, cm) and imperial (lbs, ft/in) units for your convenience.