FENa Calculator: Sodium

**FENa Calculator – Fractional Excretion of Sodium** FENa Calculator is a fast, simple medical calculator focused on **FENa (Fractional Excretion of Sodium)** and kidney function assessment. Calculate **fractional sodium excretion** using urine sodium, serum sodium, urine creatinine, and serum creatinine. ### FENa Calculator **FENa (Fractional Excretion of Sodium)** estimates the percentage of filtered sodium that is excreted in the urine. The **FENa calculation** is commonly used when assessing **kidney function, renal sodium handling, and acute kidney injury (AKI)**. Calculate FENa using four laboratory values: • Urine sodium • Serum sodium • Urine creatinine • Serum creatinine Simply enter the laboratory values to get the **FENa result** instantly. ### FENa for Kidney Function **Fractional excretion of sodium** can provide useful information about how the kidneys handle sodium and may be considered during evaluation of **acute kidney injury, renal dysfunction, and changes in kidney function**. The FENa calculator is designed for quick clinical calculations, bedside reference, medical education, and study. It can be useful for **doctors, medical students, nurses, healthcare professionals, and students learning renal physiology**. Use FENa alongside the patient's clinical presentation, laboratory findings, urine studies, and other relevant information. FENa is a calculation and should not be used as a standalone diagnostic test. ### Why Use the FENa Calculator? • Fast **FENa calculation** • Simple and clean interface • Uses urine sodium and serum sodium • Uses urine creatinine and serum creatinine • Useful for **renal function assessment** • Helpful when studying **acute kidney injury and renal physiology** • Designed for clinical and educational use ### Additional Kidney Calculators **FEUrea Calculator** Calculate **FEUrea (Fractional Excretion of Urea)** using urine urea, serum urea, urine creatinine, and serum creatinine. FEUrea provides an additional measure of renal urea handling and can be used alongside FENa when evaluating kidney function. **BUN/Creatinine Ratio** Calculate the **BUN creatinine ratio** from blood urea nitrogen and serum creatinine values for additional interpretation of renal laboratory results. **Albumin/Creatinine Ratio** Calculate the **albumin creatinine ratio (ACR)** using urine albumin and urine creatinine to assess urinary albumin excretion and support evaluation of kidney health. ### Kidney & Renal Calculators The app includes: • **FENa – Fractional Excretion of Sodium** • **FEUrea – Fractional Excretion of Urea** • **BUN/Creatinine Ratio** • **Albumin/Creatinine Ratio (ACR)** **FENa is the primary calculator in this app**, with additional renal and kidney laboratory calculations available for convenience. This app is intended for **medical calculation and educational purposes**. It does not provide a diagnosis and does not replace professional medical judgment.