For years, the general range for adult platelets has been 150,000–450,000 platelets/mcL of blood. ... Platelet count ranges by age. Age (years)Approximate platelet count (male)Approximate platelet count (female) 18–34240,000265,000 35–49245,000270,000 50–64230,000260,000 65–74220,000250,000 5 more rows Dec 23, 2022