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GFR Calculator

Estimate glomerular filtration rate (eGFR) from age, sex, and serum creatinine.

How this is calculated
2021 CKD-EPI creatinine equation (race-free): eGFR = 142 × min(Scr/κ,1)^α × max(Scr/κ,1)^-1.2 × 0.9938^age × (1.012 if female)

Assumptions used in this calculation

  • Formula: Uses the 2021 CKD-EPI creatinine equation (race-free version), the current standard in US clinical guidelines.

About this calculator

The GFR calculator estimates glomerular filtration rate (a measure of kidney function) using the 2021 CKD-EPI creatinine equation, the current standard clinical formula, from age, sex, and serum creatinine level.

Worked example

Male, 50 years old, creatinine 1.0 mg/dL

Result: eGFR ≈ 91.7 mL/min/1.73m² (Normal or high)

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