Use 2021 CKD-EPI eGFR when you need to estimate adult glomerular filtration rate with the 2021 race-free CKD-EPI creatinine equation. The result is normalized to 1.73 square metres of body surface area and is an estimate, not a measured GFR. Enter Age, Serum creatinine, and Sex using the definitions and units below so the result can be reproduced.

Age

An integer count or setting from 18 through 120, expressed in years.

Serum creatinine

A finite measured or assumed value greater than or equal to 5e-324, expressed in mg/dL.

Sex

A sequence, category, or text value; accepted values are female, male.

The published tool contract uses this rule: Estimate adult glomerular filtration rate with the 2021 race-free CKD-EPI creatinine equation. The result is normalized to 1.73 square metres of body surface area and is an estimate, not a measured GFR.

eGFR

The calculated egfr in mL/min/1.73 m2.

The output is an estimate tied to the stated model and coefficients; it is not a direct measurement and should retain that label when reported. It is informational and cannot diagnose a condition, select treatment, or replace professional interpretation of the original measurements. Age must remain between 18 and 120.

Retain the original Age, Serum creatinine, and Sex values and their units alongside the result. MDRD eGFR is useful when you instead need to estimate glomerular filtration rate with the four variable MDRD equation. Cockcroft-Gault CrCl provides another view by helping you estimate creatinine clearance with the Cockcroft-Gault equation.

• MDRD eGFR

  Estimate glomerular filtration rate with the four variable MDRD equation.

• Cockcroft-Gault CrCl

  Estimate creatinine clearance with the Cockcroft-Gault equation.

• BUN Creatinine Ratio

  Compute the blood urea nitrogen to serum creatinine ratio.