Nephrology medical calculators
Kidney function, electrolytes, and renal dosing helpers.
Renal calculators estimate glomerular filtration rate, fractional excretion of sodium, free water deficit, and sodium correction needs. CKD-EPI 2021, Cockcroft–Gault, Schwartz pediatric eGFR, and electrolyte helpers appear frequently on medicine and ICU rounds. Results must be interpreted with muscle mass, diuretic use, and acute versus chronic kidney injury context.
11 calculators
Anion Gap Calculator
Anion GapCalculate serum anion gap with optional albumin correction for acid-base workups.
Bicarbonate Deficit
HCO₃ DeficitEstimate bicarbonate deficit from weight, current HCO₃, and target.
Cockcroft–Gault CrCl
CrClEstimate creatinine clearance with the Cockcroft–Gault equation for drug-dosing contexts.
Corrected Calcium
Corrected CaEstimate albumin-corrected serum calcium for hypoalbuminemic patients.
Corrected Sodium (Hyperglycemia)
Corrected NaCorrect measured sodium for hyperglycemia using Katz (1.6) or Hillier (2.4) factors.
eGFR Calculator (CKD-EPI 2021)
eGFREstimate glomerular filtration rate with the race-free CKD-EPI 2021 creatinine equation and view CKD stage banding.
FENa (Fractional Excretion of Sodium)
FENaCalculate fractional excretion of sodium to help differentiate prerenal from intrinsic AKI patterns.
Free Water Deficit
Free Water DeficitEstimate free water deficit in hypernatremia for replacement planning.
Schwartz Pediatric eGFR
Schwartz eGFREstimate pediatric GFR with the Schwartz bedside equation (k × height / creatinine).
Serum Osmolality & Osmolar Gap
OsmolalityCalculate serum osmolality and optional osmolar gap for toxic alcohol and hyperosmolar workups.
Sodium Deficit
Na DeficitEstimate sodium deficit for hyponatremia replacement planning.