Side-by-side comparison helps you choose the right calculator for a specific clinical question.
Nephrology
Calculate the BUN to Creatinine ratio to help differentiate pre-renal from intrinsic causes of acute kidney injury. Normal ratio is 10–20.
Formula
BUN/Cr Ratio = BUN (mg/dL) / Creatinine (mg/dL). Normal 10–20.
Inputs
Nephrology
Calculate the Fractional Excretion of Sodium (FENa) to help differentiate pre-renal from intrinsic renal causes of acute kidney injury.
Formula
FENa (%) = (Urine Na × Serum Cr) / (Serum Na × Urine Cr) × 100
Inputs