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Normal levels of creatinine in the blood are approximately 0.6 to 1.2 milligrams (mg) per deciliter (dL) in adult males and 0.5 to 1.1 milligrams per deciliter in adult females.reatinine levels that reach 2.0 or more in babies and 10.0 or more in adults may indicate severe kidney impairment and the need for a dialysis machine to remove wastes from the blood.
Quick Answer. A normal serum creatinine level ranges from 0.6 to 1.1 milligrams per deciliter in women and 0.7 to 1.3 milligrams per deciliter in men, states MedlinePlus. The creatinine test is used to determine how well the kidneys function. Continue Reading.