Mayo Quadratic eGFR

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Use this calculator to estimate glomerular filtration rate (GFR) using the Mayo Quadratic formula.

Age (yrs)

About this calculator

The Mayo Clinic quadratic equation is another formula which attempts to estimate GFR from variables including serum creatinine, age and sex. This formula appears to have better performance characteristics when used in patients with preserved renal function, though further validation is ongoing. This formula is taken from Rule et al in Using Serum Creatinine To Estimate Glomerular Filtration Rate: Accuracy in Good Health and in Chronic Kidney Disease. See citations below for more information._


Rule AD, Larson TS, Bergstralh EJ, Slezak JM, Jacobsen SJ, Cosio FG. Using serum creatinine to estimate glomerular filtration rate: accuracy in good health and in chronic kidney disease. Ann Intern Med 141(12):929-37. (2004)

Rigalleau V, Lasseur C, Raffaitin C, Perlemoine C, Barthe N, Chauveau P, Combe C, Gin H. The Mayo Clinic Quadratic equation improves the prediction of glomerular filtration rate in diabetic subjects. Nephrol Dial Transplant 22(3):813-818. (2007)


QxMD Nephrology contributing author: Daniel Schwartz, MD, FRCP(C)