If you are overweight, you probably know it already and your doctor has probably warned you about its dangers.

However, muscle weighs more than fat, and some people have larger, heavier bones than others. You can be heavy and perfectly healthy if a large percentage of your weight is in bone and muscle. However, if a high percentage of your weight is fat, you are at increased risk for diabetes, heart disease, strokes, some types of cancer and other health problems.

If you're not sure where you stand, use these three simple measures to see whether you should be concerned about excess weight.

Body Mass Index (BMI)

Waist-Hip ratio