The creatinine range in an adult male is 20 to 24 milligrams per liter, while the range for adult females is 15 to 20 milligrams per liter, according to Medscape. Urine concentrations are affected by the amount of water the person consumes.
Creatinine is a waste chemical that is derived from creatine, which is used in energy production in the muscles, according to MedicineNet. Generally, the kidneys filter out creatinine, and it is disposed of via urine. Serum creatinine levels are tested to ensure that the kidneys are functioning properly. High levels of creatinine are indicative of kidney disease or impaired functioning of the kidneys.