Imperial (ft/lbs)
Metric (cm/kg)
0
| Underweight | < 18.5 |
| Healthy Weight | 18.5 – 24.9 |
| Overweight | 25.0 – 29.9 |
| Obese | 30.0 – 39.9 |
| Severely Obese | ≥ 40.0 |
The Best Free BMI Calculator Online
Body Mass Index (BMI) is a widely used screening measurement that estimates whether a person has a healthy body weight relative to their height. While it is not a diagnostic tool on its own, it is a quick and reliable way to flag potential weight-related health risks. The GadgetsFocus free online BMI calculator makes it easy to check your number in seconds.
How to Calculate Your BMI
- Choose Units: Select "Imperial" if you measure in feet and pounds, or "Metric" if you measure in centimeters and kilograms.
- Enter Your Data: Type in your height and current weight.
- Calculate: Click the blue "Calculate BMI" button. Your result will appear on a color-coded chart showing where you fall on the BMI scale.
What Do the BMI Categories Mean?
The World Health Organization (WHO) defines the following BMI categories for adults:
- Underweight (Below 18.5): May indicate malnutrition, an eating disorder, or other underlying conditions.
- Healthy Weight (18.5 – 24.9): Generally associated with the lowest risk of weight-related health problems.
- Overweight (25.0 – 29.9): May carry an increased risk of heart disease, high blood pressure, and type 2 diabetes.
- Obese (30.0+): Significantly increased risk of chronic diseases. Consult a healthcare professional.
Important Disclaimer
BMI is a screening tool, not a diagnosis. It does not directly measure body fat percentage and may not accurately reflect the health of athletes or muscular individuals. Always consult a qualified healthcare provider for personalized medical advice.