BMI Calculator
At the population level, BMI is a fairly reliable indicator of body fitness and can be used to screen for health risks but it is not a diagnostic tool.
Health Risks Related to High BMI
- Hypertension
- Respiratory issues including Sleep Apnea
- Type 2 Diabetes
- Coronary Heart Disease
- Stroke
- Osteoarthritis
- Some cancers
Enter your current weight and height to help screen for your health risks.
Enter your current weight and height to help screen for your health risks.
BMI Calculator Results
There is a fairly strong correlation between BMI and body fatness though that correlation strength varies by certain characteristics.
Some variations include the following:
- At the same BMI, women tend to have more body fat than men. On average older individuals tend to have more body fat than younger adults.
- Those who are highly active may have a high BMI because of increased muscularity rather than increased body fatness.
Researchers have found that having increased physical fitness helps to negate adverse effects of high body fatness.
Considering BMI number cannot distinguish between body fat weight and muscle weight, utilizing more direct measurements of body composition is recommended for athletes and consistently active individuals.
| Classification | BMI Category (kg/m²) | Risk of Developing Health Problems |
|---|---|---|
| Underweight | < 18.5 | Increased |
| Normal Weight | 18.5 – 24.9 | Least |
| Overweight | 25.0 – 29.9 | Increased |
| Obese Class I | 30.0 – 34.9 | High |
| Obese Class II | 35.0 – 39.9 | Very High |
| Obese Class III | >= 40.0 | Extremely High |
Health Risk Classification According to Body Mass Index (BMI)