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Fractional Excretion Sodium Calculator

Serum Na+ [mEq/L or mmol/L] =
Urine Na+ [mEq/L or mmol/L] =
Creatinine Units = 1
Serum Creatinine =
Urine Creatinine =
Fractional Excretion of Na+ =

Help

This estimates the percentage of filtered sodium that is excreted in the urine.

Rows

- Serum Na+ [mEq/L or mmol/L]: Serum Sodium concentration in mEq/L or mmol/L
- Urine Na+ [mEq/L or mmol/L]: Urinary Sodium in mEq/L or mmol/L
- Creatinine Units: the units that serum and urine creatinine values are reported in. Either accept the default of mg/dL or choose umol/L.
- Serum Creatinine: Serum Creatinine result in the units you chose
- Urine Creatinine: Urinary Creatinine result in the units you chose
- Fractional Excretion of Na+: Fractional Excretion of Sodium as a percentage.

Examples

The patient has a serum Na+ of 140 mmol/L, a urine Na+ of 15 mmol/L, a serum creatinine of 1.0 mg/dL, and a urine creatinine of 200 mg/dL. What is his fractional excretion of sodium? Input the following:
- Serum Na+ [mEq/L or mmol/L] : 140
- Urine Na+ [mEq/L or mmol/L] : 15
- Creatinine Units : mg/dL
- Serum Creatinine : 1
- Urine Creatinine : 200
The calculator solves for fractional excretion of sodium and gives an answer of 0.05 %.

Keywords

Serum Na+ [mEq/L or mmol/L]
Urine Na+ [mEq/L or mmol/L]
Creatinine Units
Serum Creatinine
Urine Creatinine
Fractional Excretion of Na+
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