Clinical calculator
Creatinine clearance calculator
Cockcroft–Gault creatinine clearance from age, weight, sex and serum creatinine — the value most often used for renal drug dosing.
Inputs
Creatinine clearance
0
mL/min (Cockcroft–Gault)
For reference only. An educational aid using the Cockcroft–Gault equation, not a
substitute for clinical judgement. Choose the weight basis per your protocol and verify before dosing.
Frequently asked questions
What formula is used for creatinine clearance?
The Cockcroft–Gault equation: CrCl = ((140 − age) × weight in kg) ÷ (72 × serum creatinine) × 0.85 if female. It is commonly used for drug dosing.
Should I use actual or ideal body weight?
Cockcroft–Gault traditionally uses actual body weight, but ideal or adjusted body weight is often preferred in obesity. Follow your local protocol.
Is creatinine clearance the same as eGFR?
No. Creatinine clearance (Cockcroft–Gault) estimates clearance for dosing; eGFR (CKD-EPI) estimates GFR normalised to body surface area for CKD staging.
Run your whole hospital, not just this tool.
Inside OlivHealth, patient weight, labs and derived values sit together on the record, so dosing maths starts from accurate, current data.