How much should a 6 year old boy weight at 42 inches tall?

According to the World Health Organization (WHO), the median weight for a 6-year-old boy who is 42 inches tall is 41.5 pounds. This means that half of 6-year-old boys of this height will weigh more than 41.5 pounds and half will weigh less. The normal weight range for a 6-year-old boy of this height is between 36.7 and 46.3 pounds.