Clinical judgment required. This calculator is a decision-support tool, not a substitute for veterinary consultation.

IRIS CKD Staging CalculatorCanineFeline

IRIS chronic kidney disease (CKD) staging for dogs and cats. Determines kidney disease stage (1-4) based on serum creatinine and SDMA values using International Renal Interest Society guidelines. Includes optional proteinuria substaging (UPC ratio) and blood pressure substaging. CKD is the most common cause of death in older cats. Used for classifying kidney disease severity, monitoring renal function decline, guiding treatment decisions, and tracking disease progression. Covers renal azotemia, kidney failure, elevated creatinine, elevated BUN, and renal insufficiency assessment. Common query: 'what stage kidney disease is my cat' or 'creatinine 3.5 in a dog'.

Species

Serum Creatinine

mg/dL

SDMA

μg/dL

UPC Ratio

ratio

Systolic Blood Pressure

mmHg

CKD Stage

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