Need help. Is 16 stone (224lbs) fat/overweight/obese for a 6"3 male?

Overweight. Your bmi calculates to 28. This is considered overweight (bmi between 25 and 30), not obese (bmi above 30). However, this calculation does not take into account muscle mass. People who lift weights and have large muscles will have higher bmis but are not overweight.