BMI Calculator
How to use BMI Calculator
Select metric (kg/cm) or imperial (lbs/ft-in) units. Enter your weight and height, then see your BMI result instantly with the category and healthy weight range. A visual scale shows where you fall.
Features
- Metric and imperial unit support
- Instant BMI calculation
- BMI category classification (underweight, normal, overweight, obese)
- Healthy weight range for your height
- Visual BMI scale indicator
- 100% client-side — no data sent to any server
Frequently Asked Questions
How is BMI calculated?
BMI is calculated by dividing your weight in kilograms by your height in meters squared (kg/m2). For imperial units, the formula is (weight in lbs x 703) / (height in inches)2.
What are the BMI categories?
Underweight: below 18.5, Normal weight: 18.5-24.9, Overweight: 25-29.9, Obese: 30 and above.
Is BMI accurate for everyone?
BMI is a useful screening tool but does not account for muscle mass, bone density, age, or body composition. Athletes may have a high BMI due to muscle. Consult a healthcare professional for a complete assessment.