GFR Calculator
Estimate kidney function (eGFR) using the CKD-EPI 2021 equation.
Result
Results are estimates for general information only and are not professional advice.
Estimated GFR
eGFR estimates how well your kidneys filter blood, based on serum creatinine, age and sex. This calculator uses the race-free CKD-EPI 2021 equation. Results are informational — always discuss kidney health with your doctor.
Frequently Asked Questions
What is the GFR Calculator?
Estimate kidney function (eGFR) using the CKD-EPI 2021 equation. It runs instantly in your browser and is completely free to use.
What do I need to enter to use the GFR Calculator?
The GFR Calculator asks for the following values (3): Gender, Age, Serum creatinine (mg/dL). Fill them in and the result appears immediately — the calculation runs on your own device, so nothing you type is sent to a server.
How accurate is the GFR Calculator?
The GFR Calculator uses standard, widely-accepted formulas, so its figures are reliable estimates for everyday planning. They are not a substitute for advice from a qualified professional.
Is the GFR Calculator free, and do I need an account?
Yes. The GFR Calculator — and every other calculator on Calculatis — is completely free, with no registration, no download and no limit on how often you use it.