There is an established way to assess if your weight is healthy, or the degree of overweight and obesity: the Body Mass Index (BMI). The BMI is calculated doing a simple operation: dividing your weight by your height. The units to use are Kilograms and meters.
BMI: Weight (Kilograms)
Height (meters squared)
BMI Classification of overweight and obesity
BMI (Kg./M2) Weight classification
Risk of medical problems related to overweight
| BMI | Weight | Risk |
| less than 18.5 | Underweight | (risks of other types of medical problems) |
| 18.5-24.9 | Normal weight | Average risk |
| 25.0-29.9 | Overweight | Slightly increased |
| 30.0-34.9 | Obese – Class I | Moderately increased |
| 35.0-39.9 | Obese – Class II | Severely increased |
| greater than 40 | Obese – Class III | Very severe risks |