Patient Info

GFR Calculator

MDRD is the now the more commonly used calculator to estimate kidney function (eGFR) from the individual's age and blood test for serum creatinine. The result calculated is more accurate below a result of 60ml/min/1.73m2 body surface area.

Values between 60 and 90ml/min/1.73m2 ,may require professional renal physician explanation, and normal values of GFR (kidney function) vary with age, gender and race. Specialist renal advice is recommended prior to further investigation.

If the result is above 90ml/min/1.73m2 BSA, no absolute value is reported by this calculator. Values above 90 are usually normal, but the MDRD calculator is less accurate at estimating kidney function; and other tests may be more appropriate.

Click here to view the calculator.

Cockcroft-Gault (CG)

Cockcroft-Gault (CG) equation has been superseded by the MDRD calculator.

This calculator requires the individual's age, height, weight, and blood test serum creatinine result to be entered.

The MDRD and CG equations and calculators are not the same. They both have their limitations and benefits. The result will vary depending upon which calculator is used.

Click here to view the calculator.

Dr Voss recommends in the first instance the MDRD equation is utilised, especially for results below 60ml/min.