Fractional Excretion of Urea (FEUrea) Calculator
Result
Fractional Excretion of Urea (FEUrea) Calculator Calculate Fractional Excretion of Urea (FEUrea) for acute kidney injury (AKI) diagnosis. FEUrea helps distinguish pre-renal (dehydration, shock) from intrinsic renal causes. Formula: FEUrea = (U_urea × P_Cr — free online calculator.
Formula
- Fractional Excretion of Urea (FEUrea) Calculator calculates its result from Urine urea, Plasma urea (BUN), Urine creatinine, Plasma creatinine. It uses the formula FEUrea = (urine urea × plasma Cr) ÷ (plasma urea × urine Cr) × 100. Change any input to recalculate the result instantly. This is an informational calculation and is not medical advice.
- The main inputs are Urine urea, Plasma urea, Urine creatinine, Plasma creatinine. Enter them in the units and format shown in the calculator.
- Use the measurement units shown beside each field. The result is an estimate and should be interpreted in context.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: Fractional Excretion of Urea (FEUrea)
- Urine urea: 300
- Plasma urea: 40 BUN
- Urine creatinine: 100
- Plasma creatinine: 2
Using Urine urea = 300, Plasma urea (BUN) = 40, Urine creatinine = 100, Plasma creatinine = 2, the calculated result is 15.
Sample result: Calculating…
Frequently asked questions
What does the Fractional Excretion of Urea (FEUrea) calculate?
Fractional Excretion of Urea (FEUrea) Calculator Calculate Fractional Excretion of Urea (FEUrea) for acute kidney injury (AKI) diagnosis. FEUrea helps distinguish pre-renal (dehydration, shock) from intrinsic renal causes. Formula: FEUrea = (U_urea × P_Cr — free online calculator.
Which values should I enter?
Enter Urine urea, Plasma urea, Urine creatinine, Plasma creatinine using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: FEUrea = (urine urea × plasma Cr) ÷ (plasma urea × urine Cr) × 100.
Why might my result differ from another source?
Results can differ because measurement methods, rounding and assumptions vary. This calculator is an estimate and is not a medical diagnosis.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.