What is this calculator?
Estimate adult eGFR using the 2021 race-free CKD-EPI creatinine equation.
What can you use it for?
Use it to understand the numerical relationship between the measurements or dates entered. Estimate adult eGFR using the 2021 race-free CKD-EPI creatinine equation.
How to use it
- Enter age (years).
- Enter serum creatinine (mg/dl).
- Enter equation sex parameter.
- Select Calculate (or Generate for random tools).
- Read the answer and any additional results below the form. Check the units and the limits of the method.
Formula and method
κ is 0.7 for female and 0.9 for male. α is −0.241 for female and −0.302 for male. The female factor is 1.012; otherwise 1. Creatinine is in mg/dL.
Worked example
Age (years): 40, Serum creatinine (mg/dL): 1, Equation sex parameter: Male. The result is 97.57511057 mL/min/1.73 m² (estimated gfr, ckd-epi 2021).
Assumptions and limits
Adults only. This estimate is not a diagnosis, disease stage or dosing recommendation. Clinical interpretation needs the full patient context.
Method references
Frequently asked questions
What inputs does the GFR Calculator need?
Use age (years), serum creatinine (mg/dl), equation sex parameter. Read the answer and any additional results below the form. Check the units and the limits of the method.
What assumptions apply to the GFR Calculator?
Adults only. This estimate is not a diagnosis, disease stage or dosing recommendation. Clinical interpretation needs the full patient context.