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GFR Calculator

Estimate kidney function (eGFR) from serum creatinine. Free, private, and runs entirely in your browser.

Enter values and press Calculate to see the result here.

How this is calculated

The CKD-EPI 2021 equation estimates filtration rate from creatinine, age and sex without a race coefficient.

Formula

eGFR = 142 × min(Scr/κ,1)^α × max(Scr/κ,1)^−1.200 × 0.9938^age × 1.012 (female)

Frequently asked questions

Is this a diagnosis? No, results need clinical context.

Normal range? Roughly 90 or above is typical for healthy adults.

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