BMI Calculator
Calculate your Body Mass Index using height and weight, then check your BMI category and healthy weight range.
Calculate BMI
Enter your height in centimetres and weight in kilograms to calculate your BMI.
Formula
Body Mass Index is calculated using weight and height:
BMI is a simple screening measure that compares body weight to height...
Understanding BMI
Body Mass Index, commonly known as BMI, is a widely used measure that compares your weight to your height. It is often used as a quick guide to understand whether your body weight is within a general healthy range.
BMI categories
- Below 18.5: Underweight
- 18.5 to 24.9: Healthy weight
- 25.0 to 29.9: Overweight
- 30.0 and above: Obese
How to calculate BMI
Convert your height from centimetres into metres, square that number, then divide your weight in kilograms by the squared height value. For example, someone who is 180cm tall and weighs 75kg has a BMI of around 23.1.
Frequently Asked Questions
What is BMI?
BMI, or Body Mass Index, is a measurement that compares your weight to your height. It is commonly used to estimate whether a person falls within an underweight, healthy weight, overweight, or obese category.
What is a healthy BMI?
A BMI between 18.5 and 24.9 is generally considered to be within the healthy weight range for most adults. Values below this range may indicate underweight, while higher values may indicate overweight or obesity.
Is BMI always accurate?
No. BMI is a useful screening tool, but it does not directly measure body fat, muscle mass, bone density, or overall fitness. It should be used alongside other health indicators rather than as a complete assessment of health.
Can athletes have a high BMI?
Yes. Athletes and people with higher levels of muscle mass may have a higher BMI despite having a healthy body composition. Muscle weighs more than fat, which can affect BMI results.
What is the difference between BMI and body fat percentage?
BMI estimates weight status based on height and weight, while body fat percentage measures the proportion of your body that is made up of fat. Body fat percentage can provide a more detailed picture of body composition.
Can I use BMI to track weight loss progress?
BMI can help track long-term changes in weight status, but it should not be the only measurement used. Waist measurements, body fat percentage, fitness improvements, and overall health markers can provide additional insight.