Creatinine Clearance Calculator

Estimates renal clearance via the Cockcroft-Gault equation with automated Ideal Body Weight (IBW) and Adjusted Body Weight (ABW) corrections for medication dose adjustments.

Pharmacopeia Standard

USP / FDA Dosing Aligned

Cockcroft-Gault CrCl Calculator

Pharmacotherapy & Antimicrobial Dosing

Serum Creatinine

Patient Age (Years)

Biological Sex

Patient Weight

Patient Height

Weight Formula Applied

Cockcroft-Gault Creatinine Clearance (Actual Weight)

72mL/min

Normal / Mild

CrCl > 50 mL/min

0 (< 10 ESRD)Moderate (30–50)120+ mL/min (Optimal)

Weight Metrics & Alternative CrCl Outputs

Actual Weight

78 kg

72 mL/min

Ideal (IBW)

70.5 kg

65 mL/min

Adjusted (ABW)

73.5 kg

68 mL/min

Calculated BMI

25.5 kg/m²

Non-Obese

Pharmacotherapy Guidance

Standard FDA package insert dosing. Routine therapeutic interval monitoring.

Renal Drug Dosing Thresholds (Standard Pharmacologic Ranges)

CrCl (mL/min)	Renal Function Tier	General Antimicrobial & DOAC Dosage Mandate
> 50 mL/min	Normal / Mild	Standard FDA package insert dosing. Routine interval surveillance.
30 – 50 mL/min	Moderate Impairment	50% dose reduction or interval extension (e.g., Cefepime, Ciprofloxacin, DOAC dose reduction).
10 – 29 mL/min	Severe Impairment	Significant dosage reduction (25–50% of normal), therapeutic drug monitoring (TDM) mandatory for Vancomycin & Aminoglycosides.
< 10 mL/min	End-Stage / Anuria	Post-hemodialysis supplemental dosing protocols. Avoid nephrotoxic agents unless strictly indicated.

Clinical Comparison: Cockcroft-Gault CrCl vs. CKD-EPI eGFR

While modern nephrology evaluates chronic kidney disease staging via CKD-EPI 2021 eGFR (mL/min/1.73m²), the US Food and Drug Administration (FDA) and pharmaceutical pharmacokinetic trials historically based drug clearance monographs on Cockcroft-Gault Creatinine Clearance (mL/min).

Cockcroft-Gault CrCl (This Tool)Units: mL/min (unindexed). Directly incorporates patient weight. The mandated equation for FDA package inserts (DOACs, Chemotherapy, Antibiotics).

CKD-EPI 2021 eGFRUnits: mL/min/1.73m² (indexed to average BSA). Preferred for diagnosis, staging, and monitoring of chronic kidney disease progression.

Companion Renal & Metabolic Tools

eGFR Calculator (CKD-EPI 2021)

Official race-free equation for KDIGO CKD G1–G5 staging.

Kidney Function Test (KFT) Panel

Reference intervals for Creatinine, BUN, Uric Acid & Electrolytes.

HbA1c to Glucose Converter

Calculate Estimated Average Glucose (eAG) from glycated hemoglobin.

All Clinical Decision Tools

Browse interactive medical calculators and pathology utilities.

Pharmacology Integrity

This tool calculates clearance using standard actual weight, Devine ideal body weight (IBW), and Winter-Salazar adjusted body weight (ABW) for obese patients (BMI ≥ 25 or Weight > 120% of IBW).

Algorithm Standard: Cockcroft & Gault (1976)