Using this tool is fast and intuitive:

1. Enter Measurements: Input your current Weight and Height. You can mix and match units (e.g., input weight in lbs and height in cm)—the tool automatically normalizes the data for the calculation.¹
2. Add Profile Details: Enter your Age, Sex, and Activity Level. While the core BMI formula relies on height and weight, these details adjust the guidance notes and interpretation of your results.
3. Calculate: Click the button to apply the standard formula: ²$BMI = \frac{weight_{kg}}{height_{m}^2}$.³
4. Visualize Results: A results panel will appear featuring:
   • Numeric Score: Your exact BMI to one decimal place.
   • Interactive Gauge: A color-coded bar (Blue/Green/Yellow/Red) showing exactly where you fall on the spectrum.
   • Target Range: A calculated weight range (in kg and lbs) that would place you in the “Normal” category for your height.
5. Review Guidance: Read the “Guidance Notes” for context regarding muscle mass, age factors, and medical advice.

Note: BMI is a general indicator and may not account for muscle mass, age, or other factors. Consult a healthcare professional for personalized advice.