Are body builders chunky based on their height and weight? How about line backers? Are they out of condition? Look at a gymnast. Generally, they have smaller builds, but larger muscles so it is likely that their BMI assessment would not read properly. Why then would you trust in an 80% accurate body fat read when no one else does?
The BMI assessment is based on your weight, squared by your height, but it does not take into consideration your muscle mass, bone density, age, sex, or fat distribution. So why then is the BMI still being used? The word is, there is nothing equally efficient and it does calculate up to 80% accuracy. In my opinion “80% accuracy” is not very accurate and the most efficient, least expensive, time saving, fastest results getting tool is you. You know your body better than anyone else. You know if you could stand to lose a few pounds. You do not need a measuring device to decide if it is time to slim down.