Health tool
BMI Calculator
Calculate body mass index using weight in kilograms and height in centimeters.
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The BMI Calculator gives a quick body mass index estimate from height and weight. BMI is widely used as a simple screening number to understand broad weight ranges for adults.
The result can be useful as a starting point, but it should be read with context because BMI does not directly measure body fat, muscle mass, or overall health.
Example BMI Calculation
Input: Weight 70 kg and height 170 cm.
Result: BMI is about 24.2, which is generally within the normal adult BMI range.
When To Use This Tool
- Get a quick BMI estimate.
- Track broad changes in weight-to-height ratio.
- Discuss a screening result with a health professional.
Limitations and Disclaimer
- BMI may be misleading for athletes, children, pregnant people, and people with high or low muscle mass.
- It is not a medical diagnosis.
How To Use BMI Calculator
Quick notes to help you understand the result before you act on it.
Overview
Use this BMI calculator for a quick body mass index estimate from weight and height. BMI is commonly used as a screening number to understand whether weight is in a broad range for height.
BMI does not measure body fat directly and can be less useful for athletes, children, pregnant people, and people with unusual muscle mass. Treat it as a general indicator, not a diagnosis.
BMI Formula
- Height in meters = height in centimeters / 100.
- BMI = weight in kilograms / (height in meters x height in meters).
- The result is usually grouped into underweight, normal, overweight, or obese ranges.
Practical Tips
- Use accurate height and weight measurements for a better estimate.
- Compare BMI with waist measurement, fitness level, and medical context.
- Speak with a qualified health professional before making major diet or health decisions.
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FAQ
Common questions about this tool.
Is the BMI Calculator free?
Yes. The tool runs in the browser and does not require login.
Is my data stored?
No. Calculations run on the page and form input is not sent to a database.
Is BMI the same as body fat percentage?
No. BMI uses height and weight only and does not measure body fat directly.
Can children use this BMI calculator?
Children need age- and sex-specific BMI charts, so this adult-style result may not be appropriate.
Should I make health decisions from BMI alone?
No. Use it as a screening number and seek professional advice for health decisions.