Kidney Function Calculator

Calculate KDIGO AKI stage based on serum creatinine changes, urine output, and dialysis status

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About This Tool

This KDIGO AKI calculator helps medical professionals determine the stage of Acute Kidney Injury according to the Kidney Disease: Improving Global Outcomes (KDIGO) guidelines. The tool calculates AKI stage based on serum creatinine changes from baseline, urine output measurements over time, and whether the patient is receiving renal replacement therapy. Simply enter the patient's baseline and current serum creatinine values, urine output data, and dialysis status to get an accurate KDIGO AKI stage along with clinical recommendations.

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How to Use

Enter the patient's baseline serum creatinine value (in mg/dL or μmol/L)
Enter the current serum creatinine value
Provide urine output measurements (optional but recommended for accurate staging)
Indicate if the patient is receiving renal replacement therapy (dialysis)
Click 'Calculate KDIGO Stage' to see the AKI stage and clinical recommendations
Use 'Reset Form' to clear all inputs and start over

Frequently Asked Questions

Find Quick Answers

What is KDIGO AKI staging?

KDIGO (Kidney Disease: Improving Global Outcomes) AKI staging is a standardized system for classifying the severity of Acute Kidney Injury based on changes in serum creatinine and urine output over time.

What units should I use for serum creatinine?

You can use either mg/dL or μmol/L. The calculator automatically detects the unit based on typical value ranges (mg/dL values are usually 0.5-10, μmol/L values are usually 44-884).

Is urine output required for KDIGO staging?

Urine output is not strictly required but is highly recommended for accurate staging. KDIGO criteria consider both serum creatinine changes AND urine output when determining AKI stage.

What does Stage 3 AKI mean?

Stage 3 AKI indicates the most severe kidney injury, with either serum creatinine ≥4.0 mg/dL, increase to ≥3× baseline, initiation of renal replacement therapy, or urine output <0.3 mL/kg/h for ≥24 hours or anuria for ≥12 hours.

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