Medically reviewed by Suzanne Fisher, RD Key Takeaways Body mass index (BMI) is a calculation used to estimate your body fat.

Body fat percentage is calculated by determining how much of a person’s weight is fat. A quick way to measure body fat percentage is to determine the circumference of the waist. Greater than 35 inches ...

We’ll start at the very beginning: Body mass index (BMI) is a measure of someone’s weight compared to their height whereas body fat percentage is a measure of how much body fat someone has ...

I have written about the use of Body Mass Index (BMI) in prior columns and the issues related to its actual applicability for accurately measuring overweight and obesity in individuals. However ...

For decades, health experts have relied on body mass index (BMI), a ratio of weight to height, to classify people as underweight, normal weight, overweight or obese. But sometimes, you need more ...

New research suggests that waist-to-hip ratio, and not body mass index is a better measure of healthy weight -- and may better predict early death than BMI.

Despite the ubiquity of the body mass index, or BMI, in medicine, many argue that it is a flawed tool, with a strange history.

Scientists are turning to a novel way to calculate obesity using a system known as the Body Roundness Index, which is touted as a more accurate measurement than Body Mass Index (BMI).

New University of Florida study finds body fat percentage is 78% more accurate than body mass index in predicting mortality risk, challenging the long-standing use of BMI as a health indicator.