The fractional excretion of sodium (FENa) is the percentage of sodium filtered by the kidney which is excreted in the urine. It is calculated as:
FENa = (UNa*PCr) / (UCr*PNa) * 100%
where UNa is urine sodium, PCr is plasma creatinine, UCr is urine creatinine, and PNa is plasma sodium.
To find FENa, simply fill in the values below and then click the “Calculate” button.
FENa = 6.349%