GFR Calculator
Estimate adult kidney filtration using race-free CKD-EPI 2021 creatinine.
Uses the race-free 2021 CKD-EPI creatinine equation for adults. A clinician interprets trends and clinical context.
How to use this calculator
- Enter adult age, equation sex, and standardized serum creatinine in mg/dL.
- Review the live result and use Copy result when you need to share it.
How the calculation works
The CKD-EPI 2021 equation applies sex-specific constants and creatinine splines, age decay, and no race coefficient.
Formula
The CKD-EPI 2021 equation applies sex-specific constants and creatinine splines, age decay, and no race coefficient.
Step-by-step calculation
- Enter adult age, equation sex, and standardized serum creatinine in mg/dL.
- The CKD-EPI 2021 equation applies sex-specific constants and creatinine splines, age decay, and no race coefficient.
- Check the displayed result, then copy it if needed.
Worked example
A 55-year-old woman with creatinine 1.0 mg/dL receives an adult eGFR estimate that requires clinical interpretation.
Risk guidance
Frequently asked questions
Does this tool send my inputs anywhere?
No. The interactive calculation runs in your browser and this site does not submit tool inputs to a backend.
How should I use the result?
Check that the entered units and values match your situation, especially around dates, breaks, and rounding.
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