Skip to main content
🇮🇪 Irish Registered Doctors  ·  Available 7 Days a Week
Calculator · Kidney function

eGFR Calculator — CKD-EPI 2021 (Race-Free)

Estimate your kidney function (eGFR) from serum creatinine using the 2021 CKD-EPI race-free formula recommended by NICE and HSE.

IMC-registered Online DoctorsSame-day appointmentsVideo or phoneAll of Ireland

About this calculator

eGFR (estimated glomerular filtration rate) is the standard measure of kidney function. The 2021 CKD-EPI race-free formula is endorsed by NICE and the HSE and is the current standard in Ireland.

What the result means

Stages G1–G2 (≥60) are normal-to-mildly decreased; CKD is diagnosed only if there are also markers of kidney damage. G3 onwards is significant — your usual treating doctor or an Online Doctor will discuss medications to adjust, blood pressure targets, and frequency of follow-up.

eGFR Calculator

Educational tool. Discuss results with your usual treating doctor or an Online Doctor.

Stages of kidney function

G1: ≥90

Normal kidney function (with markers of damage if CKD).

G3a: 45-59

Mild-moderate reduction. Annual review.

G4: 15-29

Severe reduction. Specialist review.

Frequently asked questions

Is this the official formula?
Yes — CKD-EPI 2021 race-free is the formula recommended by NICE and used by Irish labs.
Why is race no longer used?
The 2021 formula removed the race coefficient because using race introduced inaccuracy and bias.
Should I act on this number?
Always confirm with your usual treating doctor. A single eGFR value can fluctuate; CKD diagnosis needs persistent abnormality over 3 months plus other markers.
What if my eGFR is low?
Speak to your usual treating doctor or an Online Doctor. Treatable contributors include dehydration, blood pressure, diabetes, and certain medications.
Is the calculator free?
Yes — completely free, no data stored.

Speak with an Online Doctor today

Same-day video and phone consultations across Ireland.

Book a consultation
📞

Speak to support

+353 89 946 1472

✉️

Email us

support@doxoncall.ie

🩺

Available

7 days a week · same-day slots

📞 Call Book — €34.99 →
🍪

We value your privacy

We use cookies to improve your experience on our site. Essential cookies are required for core functionality. Analytics and marketing cookies help us understand how you use our site and measure ad performance. You can choose which cookies to allow. Learn more

Strictly Necessary Required for the website to function. Cannot be disabled.
Analytics Google Analytics — helps us understand how visitors use the site.
Marketing Google Ads — measures advertising effectiveness.