BMI Calculator
Calculate your Body Mass Index using metric or imperial units and see which health category you fall into.
How to use the BMI Calculator
- 1
Choose units — select metric (kg/cm) or imperial (lbs/ft).
- 2
Enter your weight and height — fill in the fields above.
- 3
Read your result — your BMI score and health category appear instantly.
BMI Calculator – Free Online Tool
Calculate your Body Mass Index and check your health category.
What is the Body Mass Index (BMI) Calculator?
The free online BMI Calculator is a screening tool that evaluates your body weight relative to your height. By crunching your input (in metric or imperial), it provides a standard numerical BMI score indicating whether you fall into the underweight, healthy weight, overweight, or obese categories as defined by the World Health Organization.
Why is tracking my BMI important?
BMI is widely used by doctors and health professionals as a vital first-step screening for potential weight-related health issues. Maintaining a 'Healthy Weight' BMI generally correlates with a lower risk of chronic conditions like heart disease, high blood pressure, and type 2 diabetes. It's a quick, non-invasive health check.
Who should not use a standard BMI score?
While BMI is a great general indicator, it has limitations. It does not distinguish between muscle mass and fat mass. Therefore, highly muscular athletes, bodybuilders, pregnant women, and the elderly may receive a misleading BMI classification. Always consult a healthcare provider for a thorough body composition analysis.
Frequently Asked Questions
Everything you need to know about the BMI Calculator.
What is considered a healthy BMI score?
According to the WHO guidelines, a normal or healthy weight BMI falls exactly between 18.5 and 24.9. A score below 18.5 is considered underweight, 25.0 to 29.9 is overweight, and 30.0 or higher is defined as obese.
Can I input my height and weight in Imperial (lbs/ft) instead of Metric?
Yes, our calculator fully supports both measurement systems. You can easily toggle between entering your metrics in pounds/feet/inches (Imperial) or kilograms/centimeters (Metric), and the mathematical formula adjusts accordingly.
Does BMI measure body fat percentage?
No, BMI does not directly measure body fat. It only measures excess weight based on an individual's height. If you need exact fat percentages, you require specialized tools like DEXA scans or skinfold calipers.