BMI Calculator
Metric + Imperial BMI Calculator
Calculate your Body Mass Index with instant health categories, visual gauges, and seamless metric/imperial switching. Get step-by-step calculations and WHO health classifications in seconds.
BMI is a screening tool for weight status. Combine with waist circumference and fitness metrics for a complete health picture. See our comprehensive BMI vs BMR guide for details.
Read comparison guide ↓BMI category: Healthy
Healthy weight range: 54.7 kg - 73.7 kg
Maintain balanced macros plus weekly strength/cardio mix.
- Convert height to meters: 172 cm → 1.72 m
- Use kg directly: 70.0 kg
- BMI = weight ÷ height² = 70.0 ÷ 1.72²
- BMI = 23.66
For most accurate health assessment, also calculate your body fat percentage and check waist circumference. These metrics together give a complete picture.
Track your BMI changes over time to monitor progress toward health goals. Record measurements monthly for best trends.
How to use this calculator
Tap metric or imperial. The calculator keeps both states so you can flip instantly during coaching calls.
Enter centimeters/kilograms or feet/inches + pounds. Presets help you benchmark common personas.
Copy the step-by-step output or print the page for onboarding packets, health funnels, or client reports.
FAQ
BMI divides weight in kilograms by height in meters squared. Imperial inputs are converted behind the scenes for identical accuracy.
Use BMI as a quick screening metric alongside waist circumference, Dexa scans, or body-fat measurements to capture nuance.
Yes. This calculator is available as a standalone tool and can be referenced in articles or health content. Always provide proper attribution to ToolsHub.