Calculate your Body Mass Index (BMI) instantly using metric or imperial units. Find out if you're in a healthy weight range and see what BMI category you fall into — underweight, normal, overweight, or obese.
BMI (Body Mass Index) is a widely used screening tool to categorise weight relative to height. It is calculated by dividing your weight in kilograms by the square of your height in metres (kg/m²). Here are the standard adult BMI categories used by the WHO and CDC:
| BMI Range | Category | Health Risk |
|---|---|---|
| Below 18.5 | Underweight | Nutritional deficiency, low bone density |
| 18.5 – 24.9 | Normal weight | Lowest risk — healthy range |
| 25.0 – 29.9 | Overweight | Increased risk of heart disease, diabetes |
| 30.0 – 34.9 | Obese (Class I) | High risk |
| 35.0 – 39.9 | Obese (Class II) | Very high risk |
| 40.0 and above | Obese (Class III) | Extremely high risk |
| Height | Healthy Weight (BMI 18.5–24.9) |
|---|---|
| 150 cm (4'11") | 41.6 – 56.1 kg (92 – 124 lbs) |
| 160 cm (5'3") | 47.4 – 63.8 kg (104 – 141 lbs) |
| 170 cm (5'7") | 53.5 – 72.0 kg (118 – 159 lbs) |
| 175 cm (5'9") | 56.7 – 76.4 kg (125 – 168 lbs) |
| 180 cm (5'11") | 59.9 – 80.7 kg (132 – 178 lbs) |
| 185 cm (6'1") | 63.3 – 85.2 kg (140 – 188 lbs) |
| 190 cm (6'3") | 66.8 – 90.0 kg (147 – 198 lbs) |