Now, BMI does have some limitations — a lot of limitations, in some cases. If you have a muscular or athletic build, for example, it may overestimate fat. In older people and in those who have lost muscle mass, it may underestimate. (Find out more about BMI calculations here.)
The most accurate method of determining your body fat percentage is asking your healthcare provider — or even a certified personal trainer — to measure you, which will either be done via calipers or water displacement.
In any case, BMI is only one factor to look at in maintaining a healthy lifestyle — but it can certainly act as a benchmark for comparison and improvement.