A six foot adult male should weigh between 140 and 177 pounds to be considered a healthy weight. This weight range puts the body mass index in the 18.5 to 24.9 range, which is ideal.
The BMI scale labels a male at the same height weighing under 140 pounds of body weight as underweight. A 6-foot-tall male weighing 180 to 220 pounds is overweight on the BMI scale, while it considers a 6-foot-tall male weighing over 220 pounds to be obese.
In addition to BMI, other weight-related factors that determine health include body shape and waist size. A man who carries most of his weight in his belly instead of his hips and has a waist over 40 inches in circumference is more likely to experience obesity-related health problems.