AKIN Classification Calculator for Acute Kidney Injury
Calculates AKIN stage using serum creatinine and urine output criteria.
Important: This tool is not a substitute for clinical judgment.
Use only with appropriate patient assessment and laboratory timing.
Enter values and click calculate.
| AKIN Stage | Serum Creatinine Criteria | Urine Output Criteria |
|---|---|---|
| Stage 1 | Increase ≥0.3 mg/dL, or ≥26.4 µmol/L, or increase to 1.5–2.0 × baseline | <0.5 mL/kg/hour for >6 hours |
| Stage 2 | Increase to >2.0–3.0 × baseline | <0.5 mL/kg/hour for >12 hours |
| Stage 3 | Increase to >3.0 × baseline, or serum creatinine ≥4.0 mg/dL with acute increase ≥0.5 mg/dL, or renal replacement therapy | <0.3 mL/kg/hour for 24 hours, or anuria for 12 hours |
References:
- Mehta RL, Kellum JA, Shah SV, et al. Acute Kidney Injury Network: report of an initiative to improve outcomes in acute kidney injury. Critical Care. 2007;11:R31.
- KDIGO Clinical Practice Guideline for Acute Kidney Injury. Kidney Disease: Improving Global Outcomes, 2012.
- Lopes JA, Jorge S. The RIFLE and AKIN classifications for acute kidney injury: a critical and comprehensive review. Clinical Kidney Journal. 2013.
