BMI Calculator
Calculate your Body Mass Index (BMI) and see which standard adult weight category it falls into.
Your BMI25.1
- Category
- Overweight
- BMI 18.5–24.9 for your height
- 125–169 lb
BMI at 5 feet 9 inches
| Weight | BMI | Category |
|---|---|---|
| 120 lb | 17.7 | Underweight |
| 140 lb | 20.7 | Healthy weight |
| 160 lb | 23.6 | Healthy weight |
| 180 lb | 26.6 | Overweight |
| 200 lb | 29.5 | Overweight |
| 220 lb | 32.5 | Obesity |
| 240 lb | 35.4 | Obesity |
How it works
BMI = weight (kg) ÷ height (m)². US units are converted to metric first.
Standard adult categories: under 18.5 underweight, 18.5–24.9 healthy, 25–29.9 overweight, 30 and above obesity.
BMI doesn't distinguish muscle from fat and isn't designed for children, pregnant people or athletes.
Tips
- Use BMI as a quick check, not a verdict. Waist size and body fat tell you more.
- BMI isn't designed for children, pregnancy or very muscular athletes.
Frequently asked questions
Is BMI accurate?
It's a quick screening number, not a diagnosis. It can overestimate fat in muscular people. Pair it with the body fat calculator for another view.
For general information only. Not medical advice — talk to a doctor or other qualified professional about your health.