eGFR Calculator (MDRD Equation)
Estimate kidney filtration rate from creatinine.
Enter your values
ⓘ Live results
Results
- eGFR
- 80.8 mL/min/1.73m²
- CKD stage estimate
- Mildly reduced (Stage 2)
Quick answer
eGFR estimates kidney function from serum creatinine adjusted for age, sex and race using the MDRD equation.
eGFR = 175 x Scr^-1.154 x age^-0.203 x 0.742 (if female) x 1.212 (if Black)
How to use the eGFR Calculator (MDRD Equation)
- 1Enter serum creatinine from a recent lab result, along with age, sex and race as used by the MDRD equation.
- 2MDRD is one of several eGFR equations; newer race-free equations (CKD-EPI 2021) are now often preferred clinically.
- 3This is an estimate for educational purposes only — kidney function assessment and CKD staging must be done by a healthcare professional.
Worked example
Using the values the calculator loads with:
Inputs
- Serum creatinine1.0 mg/dL
- Age45 years
- SexMale
- RaceOther
Results
- eGFR80.8 mL/min/1.73m²
- CKD stage estimateMildly reduced (Stage 2)
Frequently asked questions
Why does race matter in this formula?
Older equations included a race coefficient; many labs have since moved to race-free equations for equity reasons.
Is a single eGFR reading enough for diagnosis?
No — CKD diagnosis typically requires abnormal results persisting for at least 3 months.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.