Calculators

BUN/Urea Converter

Convert between blood urea nitrogen (BUN) and urea in different units.

Clinical Chemistry, Renal Open

Urine Anion Gap Calculator

Calculate the urine anion gap to estimate urinary ammonium excretion.

Renal Open

Osmolar Clearance Calculator

Calculate osmolar clearance from urine and serum osmolality and urine flow.

Renal Open

Free Water Clearance Calculator

Calculate free water clearance to assess renal water handling and dilution ability.

Renal Open

Renal Failure Index Calculator

Calculate the renal failure index to help distinguish prerenal from intrinsic acute kidney injury.

Renal Open

Fractional Excretion of Uric Acid (FEUA) Calculator

Calculate the fractional excretion of uric acid to evaluate renal uric acid handling.

Renal Open

Fractional Excretion of Potassium (FEK) Calculator

Calculate the fractional excretion of potassium to evaluate renal potassium handling.

Renal Open

Fractional Excretion of Urea (FEUrea) Calculator

Calculate FEUrea to distinguish prerenal from intrinsic acute kidney injury, especially on diuretics.

Renal Open

Fractional Excretion of Sodium (FENa) Calculator

Calculate FENa to help distinguish prerenal from intrinsic acute kidney injury.

Renal Open

BUN/Creatinine Ratio Calculator

Calculate the blood urea nitrogen to creatinine ratio to evaluate azotemia.

Renal Open

Creatinine Clearance (Cockcroft-Gault) Calculator

Estimate creatinine clearance using the Cockcroft-Gault formula for drug dosing.

Renal Open

eGFR (CKD-EPI 2021) Calculator

Estimate eGFR (estimated glomerular filtration rate, GFR) using the race-free CKD-EPI 2021 creatinine equation.

Renal Open