Calculator

Creatinine clearance (Cockcroft-Gault)

New

(140 − age) × weight ÷ (72 × creatinine), × 0.85 if female. Not valid in unstable AKI.

years
kg
mg/dL

Sex

CrCl

65 mL/min

≥ 60

< 15
15-29
30-59
≥ 60

Formula

(140 - age) * weight / (72 * cr) * sexFactor

Notes

Use actual weight if below IBW; consider adjusted weight in obesity.

References

  1. Cockcroft DW, Gault MH. Prediction of creatinine clearance from serum creatinine. Nephron 1976;16:31-41.

Used in

Antibiotics: timing, choice and dosingKDIGO definition and stagingAKI work-upDrug dosing in AKIHepatorenal and cardiorenal syndromesHospital-acquired and ventilator-associated pneumonia

Calculators support, not replace, clinical judgement. Check inputs and units, and confirm doses with your unit protocol.