Renal function tools including eGFR (CKD-EPI), creatinine clearance (Cockcroft-Gault), FENa, BUN/creatinine ratio, free water deficit, urine anion gap, and transtubular potassium gradient. For evaluating kidney function and electrolyte disorders.
This category currently includes 5 tools, including FENa Calculator, BUN/Cr Ratio, and Free Water Deficit.
These resources are built for clinicians, trainees, and medically informed patients who need fast bedside calculations. Use the results as decision support and pair them with full clinical context and local guidelines.
Calculate the Fractional Excretion of Sodium (FENa) to help differentiate pre-renal from intrinsic renal causes of acute kidney injury.
Calculate the BUN to Creatinine ratio to help differentiate pre-renal from intrinsic causes of acute kidney injury. Normal ratio is 10–20.
Calculate the free water deficit for hypernatremia correction. Estimates how much free water is needed to normalize serum sodium.
Calculate the urine anion gap to differentiate between GI and renal causes of non-anion gap metabolic acidosis. Essential for RTA workup.
Calculate measured creatinine clearance from a 24-hour urine collection. More accurate than estimated GFR in certain populations.