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GFR Calculator

Estimate adult eGFR with the race-free CKD-EPI 2021 creatinine equation.

GFR Calculator Inputs

Results computed instantly — your data never leaves your device.

Live GFR Calculator Results

Real-Time

eGFR (mL/min/1.73m²)

0.6

CKD-EPI 2021 adult estimate; not a diagnosis.

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How to Use the GFR Calculator

  1. 1

    Enter standardized creatinine in mg/dL.

  2. 2

    Enter adult age and sex.

  3. 3

    Review the CKD-EPI 2021 estimate.

  4. 4

    Discuss consequential results with a clinician.

Formula & Mathematical Basis

eGFR = 142 × min(Scr/K,1)^α × max(Scr/K,1)^−1.200 × 0.9938^Age × 1.012 if female

Variable Key

Scr

Serum creatinine in mg/dL

K

0.7 female or 0.9 male

Age

Adult age in years

📝 Race-free CKD-EPI 2021 adult estimate; not a diagnosis.

Step-by-Step Examples

1

Adult eGFR estimate

Scenario: Use a standardized lab creatinine, age, and sex.

  1. 1.Enter creatinine.
  2. 2.Enter age.
  3. 3.Choose sex.
  4. 4.Review mL/min/1.73m².
✅ The estimate is displayed with clinical limitations.

Practical Use Cases

  • Educational interpretation of lab inputs.

Common Pitfalls

  • Using non-standardized creatinine.
  • Applying an adult equation to children.
  • Treating eGFR as a diagnosis.

Frequently Asked Questions

Does it diagnose CKD?

No.

Which equation is used?

CKD-EPI 2021 creatinine equation.

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