Here are some: Normal serum creatinine range for men 0. 5-1. 5 mg/dL, for women 0. 6-1. 2 mg/dL. Normal creatinine clearance for men is 97-137 mL/min, for women 88-128 mL/min. A Glomerular Filtration Rate (GFR) above 90 is normal for adults, lower for children and the elderly, below 15 is kidney failure. In a 24 hour urine normal is less than 30 mg/day.