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Calculators
Health Calculators
Urology & Nephrology
FENa Calculator

FENa Calculator

Fractional Excretion of Sodium for AKI workup.

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About FENa Calculator

The FENa Calculator is an essential tool designed for clinicians, nephrologists, and medical professionals evaluating Acute Kidney Injury (AKI). It swiftly computes the Fractional Excretion of Sodium (FENa), a critical diagnostic index derived from serum and urine sodium and creatinine levels. By providing this precise calculation, the tool significantly aids in differentiating pre-renal azotemia from intrinsic renal AKI, particularly in oliguric patients. This distinction is vital for guiding appropriate management strategies, optimizing fluid therapy, and determining the necessity for further investigations. Leveraging this calculator enhances diagnostic accuracy and supports timely, informed clinical decision-making in the complex workup of AKI.

Next Steps
GFR Calculator (CKD-EPI)
Estimate Glomerular Filtration Rate using the race-free 2021 equation.
Creatinine Clearance (CrCl)
Cockcroft-Gault formula for kidney function assessment.
BUN/Creatinine Ratio
Differentiate causes of acute kidney injury.
ACR (Albumin/Creatinine Ratio)
Screening for diabetic nephropathy and chronic kidney disease.
PCR (Protein/Creatinine Ratio)
Assess proteinuria in renal disease.
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Electrolyte Excretion Indices
Electrolyte Excretion Indices

Assess renal handling of electrolytes and differentiate causes of acute kidney injury.

Medical Disclaimer
This tool is for educational and screening purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.