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eGFR (CKD EPI) Calculator

Work out egfr (ckd epi) instantly with clear inputs, formula shown and shareable results.

About eGFR (CKD EPI) Calculator

Applies the race-free CKD-EPI 2021 creatinine equation, the current recommended estimate of glomerular filtration rate.

Formula

CKD-EPI 2021 creatinine

eGFR = 142 x min(Scr/k,1)^a x max(Scr/k,1)^-1.200 x 0.9938^age x 1.012 (if female), with k = 0.7 female / 0.9 male and a = -0.241 female / -0.302 male

Worked example

With the default values below, eGFR (CKD EPI) Calculator returns eGFR (CKD-EPI 2021) of 88.9. Change any input above and every figure here is recalculated in your browser.

Inputs used

Serum creatinineaccepts 0.2–15 mg/dL
1 mg/dL
Ageaccepts 18–110 years
55 years
Sexone of Male, Female
Male

Results

eGFR (CKD-EPI 2021)
88.9 mL/min/1.73m2
KDIGO GFR category
G2 — mildly decreased
Sex-specific kappa
0.90

Step by step

  1. 1Values used
  2. 2CKD-EPI 2021 creatinine
  3. 3eGFR (CKD-EPI 2021)= 88.9 mL/min/1.73m2
  4. 4KDIGO GFR category= G2 — mildly decreased
  5. 5Sex-specific kappa= 0.90

Assumptions and limits

  • The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
  • This is an estimate for general information and not professional medical advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

Frequently Asked Questions

Why was race removed?

The 2021 NKF-ASN task force concluded that a race coefficient was not biologically justified and recommended the race-free equation.

Does cystatin C improve accuracy?

Yes. The combined creatinine-cystatin C equation is more accurate and is recommended when a confirmatory estimate is needed.

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eGFR (CKD EPI) Calculator – Calculate eGFR (CKD-EPI 2021)