Work out your Body Mass Index (BMI) from your height and weight, and see which weight category it falls into.
BMI is calculated by dividing weight by the square of height. It's a quick screening tool, not a diagnosis — it doesn't distinguish muscle from fat.
Under 18.5 is considered underweight, 18.5–24.9 is considered a healthy range, 25–29.9 is considered overweight, and 30 or above is considered obese, according to standard adult BMI categories.
BMI doesn't account for muscle mass, bone density, or body composition, so athletes and very muscular people often score higher than their actual body fat would suggest.
BMI is a useful screening tool for most adults but can be misleading for athletes, older adults, and people with unusually high or low muscle mass. It doesn't measure body fat directly.
For most adults, a BMI between 18.5 and 24.9 is considered a healthy weight range.
The standard BMI formula is the same for adult men and women, though body composition differences mean it's interpreted somewhat differently in clinical practice.