The average height of an adult male human varies significantly by geography, genetics, and nutrition, but it generally ranges from about 5 feet 5 inches (165 cm) to 6 feet (183 cm). In many Western countries, the average tends to be closer to 5 feet 9 inches (175 cm). Factors influencing height include hereditary traits, environmental conditions during growth, and overall health throughout childhood and adolescence. Studies have shown that male height has increased over the past century in some regions, reflecting improvements in living standards, healthcare, and nutrition availability.