Calculator · Renal / metabolic

Creatinine clearance (Cockcroft-Gault)

Estimated creatinine clearance (Cockcroft-Gault formula).

What it is for

Reference formula. Use this value with the drug’s SPC renal dosing information — the SPC say which renal-function measure applies to each drug. This page gives no dose.

Use the working calculator

The working Creatinine clearance (Cockcroft-Gault) calculator is on our calculators page. It is free and needs no account. Enter the values and it shows the result with the reading that goes with it.

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What you enter

The calculator asks for 4 items.

  • Age (yrs)
  • Weight (kg)
  • Serum creatinine (µmol/L)
  • Female sex (×0.85)

How the result is read

The result is shown as CrCl in mL/min. Formula: ((140 − age) × weight × (0.85 if F)) / (0.814 × Cr µmol/L)

Sources

These are the sources the calculator cites. Check the current version before relying on a threshold.

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For qualified clinicians. A score supports a clinical decision and does not make it: check the inputs, read the cited source, and use the tools in your clinical system for patient care where one is provided.