BMI Calculator
Calculate your Body Mass Index (BMI) easily using metric or imperial units.
Your BMI
22.9
Normal weight
What is this tool?
The BMI & TDEE Calculator determines your Body Mass Index (BMI) using standard World Health Organization (WHO) classifications, and calculates your Total Daily Energy Expenditure (TDEE) and Basal Metabolic Rate (BMR). It supports both Metric (kg/cm) and Imperial (lbs/ft/in) measurement units with visual health category gauges.
How to calculate your BMI and daily caloric needs
- Select your preferred measurement unit: Metric (kilograms & centimeters) or Imperial (pounds & feet/inches).
- Enter your current weight and height in the respective fields.
- Review your instant BMI calculation and health category status (Underweight, Normal, Overweight, Obese).
- Examine your healthy weight target range based on WHO recommendations.
Key Features
- Dual unit support: Metric (kg, cm) and Imperial (lbs, feet, inches)
- Instant categorization into WHO weight ranges: Underweight, Normal, Overweight, and Obese
- Visual status indicator with color-coded health badges
- Calculates recommended healthy weight ranges for your specific height
- Real-time reactive calculation without page refreshes
Frequently Asked Questions
What is Body Mass Index (BMI)?
Body Mass Index (BMI) is a screening formula that assesses whether an individual has a healthy body weight relative to their height, calculated as weight in kilograms divided by height in meters squared (kg/m²).
What are the standard WHO BMI categories?
Underweight is below 18.5, Normal weight is 18.5 to 24.9, Overweight is 25.0 to 29.9, and Obese is 30.0 or higher.
Does BMI account for muscle mass or body fat percentage?
No. BMI does not differentiate between muscle mass, bone density, and body fat. Athletes or bodybuilders with high muscle mass may be classified as overweight despite having low body fat.
How do I convert between metric and imperial BMI formulas?
The metric formula is weight (kg) / height (m)². The imperial formula is [weight (lbs) / height (inches)²] × 703. The calculator handles these conversions automatically.
Privacy First
All health and body metric calculations are performed locally in your browser. No health data or measurements are stored or transmitted.
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