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Kidney Function Stage Calculator

Work out kidney function stage instantly with clear inputs, formula shown and shareable results.

About Kidney Function Stage Calculator

Places an eGFR and albuminuria band on the KDIGO 2012 chronic kidney disease grid to give the combined risk category.

Formula

KDIGO staging

GFR categories G1 >=90, G2 60-89, G3a 45-59, G3b 30-44, G4 15-29, G5 <15; albuminuria A1 <30, A2 30-300, A3 >300 mg/g

Worked example

With the default values below, Kidney Function Stage Calculator returns KDIGO risk category of Moderately increased risk. Change any input above and every figure here is recalculated in your browser.

Inputs used

eGFRaccepts 2–150 mL/min/1.73m2
52 mL/min/1.73m2
Albumin to creatinine ratio bandone of A1 — under 30 mg/g, A2 — 30 to 300 mg/g, A3 — over 300 mg/g
A2 — 30 to 300 mg/g

Results

KDIGO risk category
Moderately increased risk
GFR category
G3a
Albuminuria category
A2
eGFR used
52.0 mL/min/1.73m2

Step by step

  1. 1Values used
  2. 2KDIGO staging
  3. 3KDIGO risk category= Moderately increased risk
  4. 4GFR category= G3a
  5. 5Albuminuria category= A2
  6. 6eGFR used= 52.0 mL/min/1.73m2

Assumptions and limits

  • The result is derived only from the 2 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 1 decimal place, 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 does albuminuria matter?

At the same eGFR, higher albuminuria carries substantially higher risk of progression and cardiovascular events.

Does one low eGFR confirm CKD?

No. Chronic kidney disease requires abnormality persisting for at least three months.

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