Nephrology · Internal Medicine
Fractional Excretion of Sodium (Espinel) calculator
Enter the published formula inputs below to calculate and interpret this score.
Clinical inputs
mmol/L
Allowed range: 0–1000 mmol/L
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mmol/L
Allowed range: 1–250 mmol/L
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mg/dL
Allowed range: 0.1–1000 mg/dL
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mg/dL
Allowed range: 0.1–30 mg/dL
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Result
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Clinical inputs
- Urine sodium (mmol/L)Accepted range: 0 to 1000
- Plasma sodium (mmol/L)Accepted range: 1 to 250
- Urine creatinine (mg/dL)Accepted range: 0.1 to 1000
- Plasma creatinine (mg/dL)Accepted range: 0.1 to 30
Primary source
Espinel CH. The FENa test: use in the differential diagnosis of acute renal failure. JAMA (1976)
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