Body mass index (BMI) is a quick screening measure that compares your weight to your height. Enter your details to find your BMI and the healthy weight range for your height.
BMI Calculator
BMI is a screening tool for adults and doesn’t account for muscle mass, age or body composition. Talk to your doctor about your healthy weight.
BMI Categories for Adults
| BMI | Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5 to 24.9 | Healthy weight |
| 25 to 29.9 | Overweight |
| 30 and above | Obesity |
The Limits of BMI
BMI doesn’t measure body fat directly. Muscular people can have a high BMI while being very healthy, and it can underestimate risk in older adults. Waist size, diet quality and activity all matter too. Use BMI as a starting point and talk to your doctor about what is right for you.
BMI Chart for Adults
| Height | Healthy weight range |
|---|---|
| 5 ft 0 in | 95-127 lb |
| 5 ft 3 in | 105-140 lb |
| 5 ft 6 in | 115-154 lb |
| 5 ft 9 in | 125-168 lb |
| 6 ft 0 in | 136-183 lb |
| 6 ft 3 in | 148-199 lb |
Better Ways to Measure Health
Alongside BMI, check your waist size: a waist over 35 inches for women or 40 inches for men is linked to higher health risk. You can also estimate your body fat percentage or find your ideal weight range.
Frequently Asked Questions
How is BMI calculated?
BMI is your weight in kilograms divided by your height in meters squared.
What is a healthy BMI?
For adults, the WHO defines a healthy BMI as 18.5 to 24.9.
Is BMI accurate for athletes?
Not always. Muscle weighs more than fat, so athletes may be classed as overweight despite having low body fat.
Can I use this BMI calculator for children?
No. Children and teens need age- and sex-specific BMI percentiles, so ask a pediatrician.
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