eGFR — MDRD 4-Variable Equation
Estimates glomerular filtration rate from creatinine, age, and sex for CKD staging and monitoring.
Reference: Levey AS et al. Ann Intern Med 1999
Medical Disclaimer: This calculator is a clinical decision support tool for qualified healthcare professionals. It does not replace clinical judgement. Always interpret results in the full clinical context. Reference: Levey AS et al. Ann Intern Med 1999.
More Nephrology Calculators
Estimates CrCl for drug dosing. Standard formula for renal dose adjustment (not for CKD staging).
Detects unmeasured anions in metabolic acidosis. Corrected for hypoalbuminaemia. Normal: 3–11 mEq/L.
Differentiates pre-renal from intrinsic renal AKI. FENa < 1% = pre-renal. Invalid on diuretics — use FEUrea instead.
Differentiates pre-renal from intrinsic renal AKI, particularly useful when diuretics preclude interpretation of FENa.