FENa Calculator

FENa = (Urine Sodium × Serum Creatinine) / (Serum Sodium × Urine Creatinine) × 100

FENa = (UNa × SCr) / (SNa × UCr) × 100

Result is expressed as a percentage (%)

FENa < 1%: Suggests prerenal azotemia (decreased renal perfusion)

FENa > 2%: Suggests intrinsic renal failure (acute tubular necrosis)

FENa 1-2%: Borderline/indeterminate - consider clinical context

Note: FENa is the gold standard for differentiating prerenal from intrinsic renal failure

Why Choose Our Calculator Platform?

Our professional calculator tools are designed to provide accurate, fast, and reliable results for financial, health, and everyday calculations.

All calculations are processed instantly in your browser with real-time output.

Your data is never stored. Everything runs locally for complete privacy.

Built using verified mathematical formulas to ensure precise and reliable results.

Fully responsive design works smoothly on desktop, tablet, and mobile devices.

From EMI to BMI and GST, access multiple calculators in one place.

Professional UI with clean layout, smooth animations, and easy navigation.