eGFR Calculator (CKD-EPI 2009)

Estimate GFR from serum creatinine, age and sex with the CKD-EPI 2009 equation.

By Dr Amer Sheikh, GP Updated 17 October 2026 Clinical review pending

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Which eGFR equation?

NICE NG203 recommends CKD-EPI 2009 for creatinine, without the ethnicity adjustment. Most UK labs now report this.

When eGFR is unreliable

Acute kidney injury
Pregnancy
Extremes of muscle mass, such as amputation or bodybuilding
Within 12 hours of eating meat

Use CKD staging to add the ACR. For drug dosing, use creatinine clearance.

Frequently asked questions

Which eGFR equation does the NHS use?

CKD-EPI 2009, without adjustment for ethnicity (NICE NG203).

What is a normal eGFR?

90 or more is normal. Values of 60 to 89 are normal for many older adults without other kidney markers.

Should I use eGFR for DOAC dosing?

No. Use creatinine clearance (Cockcroft–Gault).

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References

Levey AS, Stevens LA, Schmid CH, et al. A new equation to estimate glomerular filtration rate. Ann Intern Med 2009;150(9):604–12.
NICE. Chronic kidney disease: assessment and management. NG203. nice.org.uk/guidance/ng203

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