Average life expectancy in the world is 73.5 years, with average life expectancy for females being 76.2 years and 70.9 years for males, according to Worldometers. Hong Kong has the highest average life expectancy of 85.77 years, followed by Japan (85 years) and South Korea (84.53 years). India ranks 125th with average life expectancy of 72.48 years.