Is this the same as eGFR?

No—eGFR equations (e.g., CKD-EPI) differ; this is a classic CrCl estimate.

Convert to kg first (1 lb ≈ 0.453592 kg).

Never use a website for medical dosing—follow your prescriber and pharmacist.

Creatinine Clearance Calculator

How to Use

Enter age, weight in kg, serum creatinine in mg/dL, and sex. The estimate updates immediately—clinical decisions require lab-standard methods.

Formula

CrCl (mL/min) ≈ ((140 − age) × weight kg) / (72 × Scr); multiply by 0.85 if female.

Estimated creatinine clearance guide (multi-formula)

Compare Cockcroft-Gault, CKD-EPI 2021, and MDRD side by side to support dosing context, CKD staging, and quick renal-function screening.

Why this calculator runs multiple equations

Different formulas answer different clinical questions. Cockcroft-Gault remains common for drug-dosing context, while CKD-EPI 2021 is widely used for staging and diagnosis. MDRD is included as a reference comparison, especially when values diverge.

Weight selection is not a minor detail

Cockcroft-Gault can shift meaningfully depending on body-weight choice. This calculator displays ABW, IBW, and AdjBW values, plus an automatic recommendation when actual body weight exceeds 130% of IBW.

What to read first in the results

CKD stage gauge with all formula markers to detect agreement or spread.
Formula comparison bars for side-by-side numerical interpretation.
Dosing note threshold when CrCl is below 50 mL/min.

Creatinine Clearance Calculator

Essential fields

CKD stage gauge (all formulas)

Formula comparison

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