FENa (Fractional Excretion of Sodium) Calculator
Use our free FENa (Fractional Excretion of Sodium) Calculator to accurately calculate your renal function metrics. Professional formulas, instant results, and 100% privacy.
Medical Disclaimer
This tool is for educational purposes only and should not be used for diagnostic or clinical decision-making. Always consult a qualified healthcare professional before making medical decisions.
Clinical Reference Only
Fractional Excretion of Sodium (FENa)
Differentiate between pre-renal azotemia and intrinsic renal failure.
mEq/L
mg/dL
mEq/L
mg/dL
Clinical Scenarios:
Calculated FENa
0.86
%
Pre-renal (<1%)MixedIntrinsic (>2%)
Differential Diagnosis
Note: FENa is less reliable in patients taking diuretics. Consider FEUrea in those cases.
How to Use FENa (Fractional Excretion of Sodium) Calculator in 3 Easy Steps
1
Step 1
Enter your age, gender, and physical measurements into the fields.
2
Step 2
If applicable, enter laboratory values precisely from your medical reports.
3
Step 3
View the interpreted result and health category in the output panel.
Frequently Asked Questions
Our engine uses industry-standard formulas (e.g., Du Bois for BSA, CKD-EPI for GFR). However, results are for informational purposes only.
No. All calculations are processed locally in your browser. We never see or store your medical or fitness data.
Yes, all health and medical utilities on ToolsHub are completely free with no registration required.