| Total Vol Urine (mL) | |
| Urine Creatinine (g/24 hr) | |
| Serum Creatinine | |
| unit | mg/dL µmol/L |
Creatinine Clearance (24hr Urine) in mL/min=
[urine Cr (mg/dL) x vol Ur (mL) ] / [ plasma Cr (mg/dL) x time (min)]
Assumes 24 hr (1440 min) urine collection
Renal impairment:
Normal : >85 mL/min
Mild impairment: 60-85 mL/min
Moderate impairment: 30-59 mL/min
Severe impairment: < 30 mL/min