eGFR & Creatinine Clearance Calculator
Estimate kidney function for staging and drug dosing. Uses the race-free CKD-EPI 2021 equation for eGFR and the Cockcroft-Gault equation for creatinine clearance, with the KDIGO risk category when albuminuria is entered.
Weight powers the Cockcroft-Gault clearance. Height adds body surface area, which de-indexes eGFR to mL/min for dosing and gives the ideal/adjusted dosing weight.
KDIGO stages CKD by cause, GFR and albuminuria. Without a UACR the G-category alone does not give the risk category.
Enter age and serum creatinine to calculate.
For use by qualified healthcare professionals as a reference aid only. The G-category is not a CKD diagnosis on its own: KDIGO requires the abnormality to persist for more than three months and stages by cause, GFR and albuminuria together. The 1.73m²-indexed eGFR is for staging; use the absolute mL/min value for drug dosing at extremes of body size. Cockcroft-Gault clearance is already unindexed. Both equations assume steady-state creatinine — avoid them in acute kidney injury. Results are estimates and do not replace clinical judgement.