Fractional Excretion of Sodium (FENa). Quick and easy to use FENa calculator. Enter the required data to get FENa percentage result: Plasma Sodium: mmol/L or mEq/L Plasma Creatinine: mg\dL or µmol/L Urine Sodium: mmol/L or mEq/L Urine Creatinine: mg\dL or µmol/L No fuss calculator. Does what it says on the tin.
