Health

FEUrea Calculator

Useful when FENa is unreliable (diuretic use).

Serum BUN (mg/dL)

Urine Urea (mg/dL)

Serum Creatinine (mg/dL)

Urine Creatinine (mg/dL)

FEUrea—

Interpretation—

FEUrea = (UUrea × SCr) / (SUrea × UCr) × 100
<35%: Pre-renal | >50%: Intrinsic renal (ATN)