eGFR Calculator
Estimated GFR from creatinine using CKD-EPI equation.
Medical Disclaimer
This calculator is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about your health. Never disregard professional medical advice or delay seeking it because of results from this tool.
Inputs
Results
eGFR (CKD-EPI 2021)
91.7 mL/min/1.73m²
How to Use This Calculator
- Enter serum creatinine (mg/dL), patient age (years), and body weight (kg).
- Select biological sex (0 = male, 1 = female).
- Read eGFR using the 2021 CKD-EPI race-free equation (mL/min/1.73m2).
- Review creatinine clearance via Cockcroft-Gault (mL/min) for drug dosing decisions.
- Note the resulting CKD stage (1-5) based on the calculated eGFR.
How the result changes with Serum Creatinine (mg/dL)
| Serum Creatinine (mg/dL) | eGFR (CKD-EPI 2021) |
|---|---|
| 3.09 | 23.7 mL/min/1.73m² |
| 11 | 5.2 mL/min/1.73m² |
| 20 | 2.5 mL/min/1.73m² |
| 27 | 1.8 mL/min/1.73m² |
What each input means
- Serum Creatinine (mg/dL)
- Serum creatinine concentration in mg/dL.
- Age (years)
- Patient age in years (18+).
- Weight (kg)
- Body weight in kg (used for Cockcroft-Gault CrCl).
- Sex (0=Male, 1=Female)
- Biological sex: 0 for male, 1 for female.
What each result means
- eGFR (CKD-EPI 2021)
- Estimated glomerular filtration rate using the 2021 CKD-EPI race-free equation.
- CrCl (Cockcroft-Gault)
- Creatinine clearance estimated by the Cockcroft-Gault formula.
- CKD Stage
- CKD stage based on eGFR: 1 (>=90), 2 (60-89), 3/3.5 (30-59), 4 (15-29), 5 (<15).
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersSerum Creatinine (mg/dL) = 1, Age (years) = 50, Weight (kg) = 70, Sex (0=Male, 1=Female) = 0 = 4 input(s) provided
- Calculate eGFReGFR = 142 * minTerm * maxTerm * ageTerm * sexFactor91.7 = 91.7
- Calculate CrCl87.5 = 87.5
- Calculate CKD StageCKD Stage1 = 1
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