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Kalkulačka eGFR (CKD-EPI)

🩺Kalkulačka eGFR (CKD-EPI 2021)

Serum creatinine (mg/dL)

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What is eGFR Calculator (CKD-EPI)?

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eGFR (estimated Glomerular Filtration Rate) measures kidney function — how well the kidneys filter waste from blood. Calculated from serum creatinine, age, and sex using the CKD-EPI 2021 equation (replaces MDRD). Normal eGFR > 90 mL/min/1.73m².

Calkulon makes complex calculations simple — built for students and everyday problem-solvers.

How to eGFR Calculator (CKD-EPI)

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1CKD-EPI 2021: eGFR = 142 × min(Cr/κ,1)^α × max(Cr/κ,1)^-1.200 × 0.9938^Age × 1.012 (female)
2κ = 0.7 (female), 0.9 (male) · α = −0.241 (female), −0.302 (male)
3Classify by eGFR into CKD stages G1–G5

Worked Examples

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Example 1

Given:Female, age 55, creatinine 1.1 mg/dL

Výsledok:eGFR ≈ 58 mL/min/1.73m² → G3a (mildly-moderately reduced)

Warrants nephrology referral

CKD stages by eGFR

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Stage	eGFR	Description
G1	≥ 90	Normal or high
G2	60–89	Mildly reduced
G3a	45–59	Mild-moderately reduced
G3b	30–44	Moderately-severely reduced
G4	15–29	Severely reduced
G5	< 15	Kidney failure

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Did you know?

The kidneys filter about 180 litres of blood every 24 hours, producing only 1–2 litres of urine. At eGFR < 15 (stage 5), dialysis or transplantation becomes necessary.

References

Len na informačné účely. Tento nástroj nenahrádza odborné lekárske poradenstvo, diagnózu ani liečbu. Vždy sa poraďte s kvalifikovaným zdravotníckym odborníkom.

Deep Dive

Read the full guide on how to use this calculator effectively

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Kalkulačka eGFR (CKD-EPI)