..., or within the normal range? - What Are Normal Blood Creatinine Levels?Normal blood creatinine levels vary and depend on age, race, gender, and body size.Normal serum creatinine ranges are:0.6–1.1 mg/dL in women and adolescents aged 16 and older0.8–1.3 mg/dL in men and adolescents aged 16 and older0.2 or more in infants, depending on muscle developmentSerum creatinine ranges are lower for women because women have less muscle mass and, thus, a lower rate of creatinine formation and excretion.Normal blood creatinine levels also vary by race. For non-Hispanic blacks, the average blood creatinine is 1.25 mg/dL in men and 1.01 mg/dL in women. In non-Hispanic whites the mean blood creatinine levels are 1.16 mg/dL in men and 0.97 mg/dL in women, and in Mexican-Americans the values are 1.07 mg/dL in men and 0.86 mg/dL in women.