Health & Fitness
Cockcroft-Gault Creatinine Clearance Calculator
Estimate creatinine clearance for drug dosing using the Cockcroft-Gault equation.
Preparing your result…
What this calculator does
Calculates Cockcroft-Gault Creatinine Clearance Calculator using the formula verified against the cited source.
What your result means
An estimate from the inputs you enter, within the scope stated below — not advice.
Formula
CrCl (mL/min) = (140 − age) × weight (kg) ÷ (72 × serum creatinine mg/dL), × 0.85 if female; µmol/L ÷ 88.4 = mg/dL
The step-by-step working for your own numbers appears with the result above and in the PDF report.
Frequently asked questions
Symbols and assumptions
- Inputs
- The values entered in the fields above
- • Cockcroft–Gault estimated creatinine clearance, mL/min=[(140−age years)×specified weight kg]/[72×Scr mg/dL], multiplied by 0.85 for females in the original model.
Sources and review
Reviewed 2026-10-18 · Next review 2027-04-18
- • Specify weight selection and unit conversion; obesity/edema and altered body composition require protocol-specific consideration. Require positive Scr and adult age; unstable creatinine undermines estimation. This is unindexed estimated CrCl, not interchangeable with indexed CKD-EPI eGFR.
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
Quick reference
| Scenario | Age (years) | Weight used (actual, ideal or adjusted per protocol) (kg) | Serum creatinine | Estimated creatinine clearance |
|---|---|---|---|---|
| Worked example | 60 | 70 | 1 | 77.7778 mL/min |
| Half the amounts | 30 | 35 | 0.5 | 106.9444 mL/min |
| Double the amounts | 110 | 140 | 2 | 29.1667 mL/min |
Need the full picture? Get the detailed PDF report with charts, tables, formulas and working steps.
Reviewed 2026-10-18 · Next review 2027-04-18
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