AKIN criteria (AKI staging)
AKIN criteria (Mehta 2007): the acute-kidney-injury stage 1-3 from the creatinine rise (absolute or ratio within 48 h), the urine-output category, or initiation of renal replacement therapy; the worst criterion governs.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Baseline creatinine
- 1.0 mg/dL
- Current creatinine
- 3.5 mg/dL
Result: AKIN stage 3 (governed by creatinine).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Stages
- within 48 h: stage 1 (rise >= 0.3 mg/dL or x1.5-2), stage 2 (x2-3), stage 3 (x3, or creatinine >= 4.0 with rise >= 0.5, or RRT).
What you enter
- Baseline creatinine
- Current creatinine
- Renal replacement therapy initiated
- Urine-output category
How this is calculated
- Rule
- RRT initiation forces stage 3; the stage is the worse of the creatinine and urine-output criteria.
Mehta RL, Kellum JA, Shah SV, et al; Acute Kidney Injury Network. Acute Kidney Injury Network: report of an initiative to improve outcomes in acute kidney injury. Crit Care. 2007;11(2):R31. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.