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Generally speaking, normal creatinine level ranges from 0.5 to 1.1 mg/dl for female and 0.6 to 1.2 mg/dl for male. It is possible that the normal creatinine level for people with only one kidney is a little higher.
How is kidney disease measured? There are various stages of chronic kidney disease (CKD). In order to determine which stage of CKD a person is at, the glomerular filtration rate (GFR) of the kidneys are measured. This tells how quickly the kidneys are cleaning the blood and is reported in millilitres per minute. A normal GFR is greater than 90 mL/min.