GFR Calculator

eGFR estimates kidney filtration from serum creatinine, age and sex; it is an estimate and should be interpreted with clinical context. Formula: CKD-EPI 2021 uses 142 × min(Scr/k,1)^α × max(Scr/k,1)^−1.200 × 0.9938^Age × sex factor.

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Estimate Glomerular Filtration Rate

eGFR estimates kidney filtration from serum creatinine, age and sex; it is an estimate and should be interpreted with clinical context.

Formula: CKD-EPI 2021 uses 142 × min(Scr/k,1)^α × max(Scr/k,1)^−1.200 × 0.9938^Age × sex factor.

Use the same units and measurement method expected by the calculator. Results from body measurements, activity levels, or health formulas are estimates and can vary when the underlying inputs or method changes.

Repeat the calculation with the same measurements and method, then compare the result with the displayed formula. Treat the result as an estimate where applicable.

Frequently Asked Questions FAQ

What does GFR Calculator calculate?
eGFR estimates kidney filtration from serum creatinine, age and sex; it is an estimate and should be interpreted with clinical context.
What is the formula for GFR Calculator?
The formula used by the calculator is: CKD-EPI 2021 uses 142 × min(Scr/k,1)^α × max(Scr/k,1)^−1.200 × 0.9938^Age × sex factor.
What inputs does GFR Calculator need?
Enter serum creatinine, age and sex, using the units expected by the CKD-EPI 2021 method.
How can I verify the GFR Calculator result?
Repeat the calculation with the same measurements and method, then compare the result with the displayed formula. Treat the result as an estimate where applicable.
How should I round the GFR Calculator result?
Avoid unnecessary precision because many health calculations are estimates. Round the displayed result only as appropriate for the measurement method.

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