Fractional Excretion of Urea (FEUrea) Calculator

Calculate FEUrea to differentiate pre-renal from intrinsic AKI — preferred over FENa when diuretics have been given.

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Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Calculate FEUrea to differentiate pre-renal from intrinsic AKI — preferred over FENa when diuretics have been given

Each component has a specific meaning:

  • Intrinsic AKI — preferred over FENa when diuretics have been given — The intrinsic aki — preferred over fena when diuretics have been given recorded for the scenario being assessed.

Note: Interpret the feurea calculator result against the thresholds and context described above.

How to Use

Enter the intrinsic AKI — preferred over FENa when diuretics have been given for the scenario you are assessing. Calculate FEUrea to differentiate pre-renal from intrinsic AKI — preferred over FENa when diuretics have been given. Use the feurea calculator result to inform your calculation.

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Frequently Asked Questions