AZMedAppz
Sign inSet up a practice
Free, no sign-in

eGFR (CKD-EPI 2021)

Estimated glomerular filtration rate from serum creatinine, using the race-free 2021 CKD-EPI equation, with the CKD stage the value alone supports.

An illustration of a clinic toolkit: calculators, checklists, guides and reports
Fill the fields above and the answer appears here, with the working spelled out — the same working the in-product version saves to the chart.
Nothing you type here is sent anywhere. The calculation runs in your browser and the page keeps no record of it.

How it is worked out

CKD-EPI 2021 creatinine equation: 142 × min(Scr/κ,1)^α × max(Scr/κ,1)^−1.200 × 0.9938^age × 1.012 if female, with κ = 0.7 and α = −0.241 for women and κ = 0.9 and α = −0.302 for men.

What it does not do

An estimate for a steady state. It is not valid in acute kidney injury, in pregnancy, at the extremes of muscle mass, or under 18. Staging needs albuminuria and three months of chronicity as well — the value alone gives you the G stage and nothing more.

It is a calculator, not a clinician. Nothing here is medical advice, and the person prescribing owns the decision.

Save this to a patient’s chart

That is the one thing this page cannot do. Inside MedAppz the same calculator writes the value and its working onto the record, so a year later anybody reading the chart can see which numbers produced it. 15 more calculators come with it.

The other calculators