Most of us can look in the mirror and tell if we are overweight. In simple, terms, if you can pinch an inch at your waist or weigh over 10 to 15 pounds more than you did when you were 20, you probably need to lose weight.
Experts now evaluate body weight using a more complex formula called body mass index, or BMI. BMI expresses body weight in relation to height. (BMI actually equals body weight in kilograms divided by height in meters squared.)
Experts consider a person with a BMI of 25 to 29 to be overweight, and a person with a BMI of 30 or more to be obese. You can use the following table tell if your BMI exceeds these numbers.