GFR MDRD Calculator for Adults (Conventional units)

In adults, the best equation for estimating glomerular filtration rate (GFR) from serum creatinine is the isotope dilution mass spectrometry (IDMS)-traceable Modification of Diet in Renal Disease (MDRD) Study equation¹. All laboratories should be using creatinine methods calibrated to be IDMS traceable. Read more about creatinine standardization.

This IDMS-traceable MDRD study equation calculator is for use with S_cr reported in mg/dL.

GFR (mL/min/1.73 m²) = 175 × (S_cr)^-1.154 × (Age)^-0.203 × (0.742 if female) × (1.212 if African American) (conventional units)

The equation does not require weight because the results are reported normalized to 1.73 m² body surface area, which is an accepted average adult surface area.

References

1.Levey AS, Coresh J, Greene T, Stevens LA, Zhang YL, Hendriksen S, Kusek JW, Van Lente F; Chronic Kidney Disease Epidemiology Collaboration. Using standardized serum creatinine values in the modification of diet in renal disease study equation for estimating glomerular filtration rate.Ann Intern Med. 2006 Aug 15;145(4):247-54.