Measuring body mass index (BMI) is a limited but simple way to identify if an individual is underweight, overweight or obese. The formula for BMI is based on the ratio of weight to height. The National Institutes of Health (NIH) admits that although BMI is an adequate measure of body fat levels for normal individuals, it may overestimate body fat levels in athletes and underestimate body fat levels in the elderly. Although there are more accurate ways to measure body fat levels in the body, BMI is sufficient for the general population, easy to measure and requires little to no equipment.
Tips and Warnings
- Zero your scales before you begin to ensure accurate readings. Use the scales on a flat, firm surface. If you feel your score is not accurate, consider testing your body fat in other ways. Some examples include body fat caliper testing, water weighing and DEXA bone density scanning. Some university laboratories or athletic departments have the equipment to take these measurements.
- Always consult your physician or registered dietician for advice on managing your weight.
Things You'll Need
- Weight scale
- Measuring tape
- Calculator
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