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About BMI Calculator
Our Body Mass Index (BMI) calculator provides instant health assessments based on your weight and height measurements. BMI is a widely used metric that helps determine whether your weight is healthy relative to your height.
The BMI calculation was developed in the 19th century and remains one of the most accessible health screening tools available. While it doesn't directly measure body fat, it provides a reliable indicator of healthy weight ranges for most adults.
Understanding your BMI can help you make informed decisions about diet, exercise, and overall health management. Our calculator categorizes results into underweight, normal weight, overweight, and obese categories based on World Health Organization standards.
BMI Categories
- Underweight: BMI below 18.5
- Normal weight: BMI 18.5-24.9
- Overweight: BMI 25-29.9
- Obese: BMI 30 and above
Our BMI calculator is completely free to use and provides instant results without requiring any personal information or registration. The tool works on all devices and browsers, making it accessible whenever you need to check your BMI.
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Frequently Asked Questions
How accurate is this BMI calculator?
Our BMI calculator uses the standard formula: weight (kg) ÷ height² (m²). It provides accurate results to one decimal place and categorizes your BMI according to World Health Organization standards.
What is a healthy BMI range?
A healthy BMI typically ranges from 18.5 to 24.9 for most adults. However, factors like age, muscle mass, and overall health should be considered. Athletes may have higher BMI due to increased muscle mass.
Should I use metric or imperial units?
Our calculator accepts weight in kilograms or pounds and height in centimeters or inches. The BMI formula automatically converts to metric units, so you can use whichever measurement system is most familiar to you.
How often should I check my BMI?
Most healthcare professionals recommend checking your BMI annually or whenever there are significant changes in your weight or height. Regular monitoring helps track your health progress and identify potential issues early.
Is my data secure when using this calculator?
Yes, your privacy is completely protected. All calculations happen locally in your browser, and we don't store any personal information. Your BMI results are not saved or shared with anyone.