What is the MDRD equation?

The MDRD (Modification of Diet in Renal Disease) Study equation estimates GFR from creatinine, age, sex, and optionally race.

GFR is the glomerular filtration rate — how much blood the kidneys filter per minute. Lower values can indicate reduced kidney function.

GFR (MDRD 4-variable)

Glomerular filtration rate using the MDRD Study equation.

What this calculator does

This tool estimates kidney function (glomerular filtration rate) using the MDRD Study equation. It is based on creatinine, age, sex, and optionally race.

What your result means

The result reflects estimated kidney filtering ability. Lower values may indicate reduced function. Your doctor will interpret it in context with other tests and your health.

This is not medical advice. A healthcare provider should interpret results in your context.

Serum creatinine (mg/dL)

Age (years)

Sex

Black race

Key terms

MDRD: Modification of Diet in Renal Disease Study; an equation used to estimate GFR from creatinine, age, sex, and sometimes race.
GFR: Glomerular filtration rate; rate of kidney filtration.

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This tool is for educational and reference use only. It does not constitute medical advice. Always consult a healthcare professional for medical decisions.