Bmi Calculator By Age
Calculate your Body Mass Index (BMI) based on your weight, height, age, and gender. This tool provides your BMI value, category, and a visual indicator.
Published by:
isCalculator Editorial Team
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How to use this tool?
How to Use the BMI Calculator by Age
- Select Gender: Choose "Male" or "Female" from the dropdown.
- Enter Age: Input your age in years (range: 2–120).
- Enter Height: Input your height in centimeters (range: 50–300 cm).
- Enter Weight: Input your weight in kilograms (range: 10–500 kg).
- Click "Calculate": Your BMI value, category (Underweight, Normal, Overweight, Obese), and a color-coded progress bar will appear.
Important Notes:
- All measurements must be in metric units (cm and kg).
- Age is used for reference only; BMI categories may differ for children and older adults.
- If you see a red error message, check that your inputs are within the allowed ranges.
Previous Results
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Frequently Asked Questions
BMI is calculated by dividing your weight in kilograms by the square of your height in meters. Formula: BMI = weight (kg) / (height (m))^2.
Yes, BMI categories are generally for adults. For children and older adults, different percentiles or considerations may apply. This calculator provides standard adult categories.
Underweight: <18.5, Normal: 18.5–24.9, Overweight: 25–29.9, Obese: ≥30. These are standard WHO classifications.
