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Glossary Health & Fitness

GFR (glomerular filtration rate)

GFR is the volume of blood the kidneys filter per minute, estimated from a creatinine blood test, age and sex.

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In more detail

The CKD-EPI 2021 equation gives about 91.7 mL/min/1.73 m² for a 50-year-old man with creatinine 1.0 mg/dL. Values of 90 or more are normal range if there are no other signs of kidney damage; lower values are staged by a clinician.

Try these tools

GFR Calculator

Estimate your kidney function using the race-free CKD-EPI 2021 creatinine equation for glomerular filtration rate (eGFR).

Creatinine Clearance Calculator

Estimate creatinine clearance (mL/min) with the Cockcroft-Gault equation from age, sex, weight and serum creatinine, using actual.

See also

  • Glossary A1C (HbA1c)
    A1C is a blood test showing average blood sugar over the past two to three months, reported as the percentage of hemoglobin carrying sugar.
  • Cheat sheet Medical Formulas Cheat Sheet
    A1C to glucose, blood pressure bands, cholesterol, kidney function, QTc, blood alcohol and IV drip rate with worked examples.
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