Calculator Tools/BMI Calculator
BMI Calculator
Calculate Body Mass Index (BMI) and Basal Metabolic Rate (BMR)
Input
cm
kg
Result
Enter your height and weight
BMI Calculator Guide
Learn how to understand and use BMI and health metrics
What is BMI?
BMI (Body Mass Index) estimates body fat based on height and weight. Formula: BMI = weight(kg) / height(m)². Widely used for health screening, obesity assessment, and health risk evaluation.
How to Use
- Select unit system (Metric or Imperial)
- Enter your height and weight
- Optionally enter age and gender for BMR calculation
Important Notes
- BMI doesn't distinguish muscle mass - athletes may show high values
- Asian populations have different BMI thresholds due to metabolic risks
- BMI is just a reference - consult a healthcare professional
FAQ
My BMI is normal but I have belly fat
This could be 'skinny fat'. BMI doesn't account for fat distribution. Check your waist circumference (men >90cm, women >85cm is concerning).
I'm an athlete but my BMI shows overweight
BMI can't distinguish between muscle and fat. High muscle mass can result in elevated BMI while being healthy. Consider body fat percentage measurement.
What is BMR (Basal Metabolic Rate)?
BMR is the minimum calories needed for survival at complete rest. It's used for breathing, temperature regulation, and cellular activity. Total daily needs (TDEE) = BMR × activity factor.