The average weight for a 5-foot 11-inch male is 172 pounds or 78.12 kilograms, plus or minus 10 percent. According to Timi Gustafson, R.D., this figure is obtained by adding 60 pounds to 106 pounds for the first 5 feet, for every additional inch.
For a 5-foot 11-inch male, take 106 pounds for the 5 feet. Take the additional 11 inches, and multiply by 60 pounds. This gives 106 plus 66 pounds, equalling 172 pounds. A healthy 5-foot 11-inch male should therefore stay within a weight range of 172 pounds, plus or minus 10 percent. To calculate female weight, the figure 106 is replaced by 100 pounds, according to Gustafson.