Fractional Excretion of Urea (FEUrea). Quick and easy to use FEUrea calculator. Enter required data to get FEUrea percentage result: Serum Urea/BUN: mg\dL or mmol/L Serum Creatinine: mg\dL or µmol/L Urine Urea: mg\dL or mmol/L Urine Creatinine: mg\dL or µmol/L No fuss calculator. It does what it says on the tin.
