tools / kidney function

eGFR · kidney function.

Estimated Glomerular Filtration Rate using the CKD-EPI 2009 equation. The standard screen for chronic kidney disease.

result

Enter your serum creatinine, age, and gender. Result appears here, colored by CKD stage.

Chronic kidney disease stages

Stage 1Normal kidney function

eGFR ≥ 90

Stage 2Mild loss of function

eGFR 60 – 89

Stage 3aMild to moderate loss

eGFR 45 – 59

Stage 3bModerate to severe loss

eGFR 30 – 44

Stage 4Severe loss

eGFR 15 – 29

Stage 5Kidney failure

eGFR < 15

About this calculator

eGFR estimates how well your kidneys filter waste from blood, in mL/min per 1.73m² body surface area. This calculator uses the CKD-EPI 2009 equation — the current standard for adults.

Why eGFR matters

Earliest practical screen for chronic kidney disease.
Tracks function over time — trend matters more than a single reading.
Determines safe dosing for many medications (especially metformin, NSAIDs, contrast).
Triggers referral to nephrology and planning for advanced therapy.

Disclaimer. Estimate using the CKD-EPI 2009 equation. Lab-reported eGFR may use a newer race-free 2021 variant. For clinical decisions, use your lab’s value and consult a clinician.

tools / kidney function

eGFR · kidney function.

Estimated Glomerular Filtration Rate using the CKD-EPI 2009 equation. The standard screen for chronic kidney disease.

result

Enter your serum creatinine, age, and gender. Result appears here, colored by CKD stage.

Chronic kidney disease stages

Stage 1Normal kidney function

eGFR ≥ 90

Stage 2Mild loss of function

eGFR 60 – 89

Stage 3aMild to moderate loss

eGFR 45 – 59

Stage 3bModerate to severe loss

eGFR 30 – 44

Stage 4Severe loss

eGFR 15 – 29

Stage 5Kidney failure

eGFR < 15

About this calculator

eGFR estimates how well your kidneys filter waste from blood, in mL/min per 1.73m² body surface area. This calculator uses the CKD-EPI 2009 equation — the current standard for adults.

Why eGFR matters

Earliest practical screen for chronic kidney disease.
Tracks function over time — trend matters more than a single reading.
Determines safe dosing for many medications (especially metformin, NSAIDs, contrast).
Triggers referral to nephrology and planning for advanced therapy.

Disclaimer. Estimate using the CKD-EPI 2009 equation. Lab-reported eGFR may use a newer race-free 2021 variant. For clinical decisions, use your lab’s value and consult a clinician.

eGFR · kidney function.

Calculate eGFR

Chronic kidney disease stages

About this calculator

Why eGFR matters

eGFR · kidney function.

Calculate eGFR

Chronic kidney disease stages

About this calculator

Why eGFR matters