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eGFR (MDRD) Calculator

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

About eGFR (MDRD) Calculator

Uses the four-variable IDMS-traceable MDRD study equation to estimate glomerular filtration rate normalised to 1.73 square metres.

Formula

MDRD (IDMS-traceable)

eGFR = 175 x Scr^-1.154 x age^-0.203 x 0.742 (if female) x 1.212 (if Black)

Worked example

With the default values below, eGFR (MDRD) Calculator returns eGFR (MDRD) of 62.9. Change any input above and every figure here is recalculated in your browser.

Inputs used

Serum creatinineaccepts 0.2–15 mg/dL
1.2 mg/dL
Ageaccepts 18–110 years
55 years
Sexone of Male, Female
Male
Ethnicity coefficientone of Do not apply, Apply the 1.212 Black coefficient
Do not apply

Results

eGFR (MDRD)
62.9 mL/min/1.73m2
KDIGO GFR category
G2
Rounded eGFR
63 mL/min/1.73m2

Step by step

  1. 1Values used
  2. 2MDRD (IDMS-traceable)
  3. 3eGFR (MDRD)= 62.9 mL/min/1.73m2
  4. 4KDIGO GFR category= G2
  5. 5Rounded eGFR= 63 mL/min/1.73m2

Assumptions and limits

  • The result is derived only from the 4 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

Is the ethnicity coefficient still used?

Most guidelines now recommend race-free equations such as CKD-EPI 2021; the coefficient is included here for legacy comparison.

Where is MDRD least reliable?

Above about 60 mL/min/1.73m2, where it systematically underestimates true GFR.

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eGFR (MDRD) Calculator | Calcrivo