eGFR Calculator (CKD Stages)
Calculate your estimated Glomerular Filtration Rate (eGFR) and CKD Stage using the CKD-EPI (2021) or MDRD equations.
Input Parameters
Enter details for calculation.
Estimated GFR (CKD-EPI)
Expert Tip
The 2021 CKD-EPI equation does not include a race coefficient. eGFR < 60 mL/min/1.73m² for ≥ 3 months defines Chronic Kidney Disease.
Calculation Methodology & Details
Formula
κ = 0.7 (female) or 0.9 (male); α = -0.241 (female) or -0.302 (male).Scr = serum creatinine.
Important Disclaimer
The calculations provided are for educational and general informational purposes only. They do not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider.
How eGFR is Calculated
Follow these steps to use this calculator:
Input Labs & Age
Enter creatinine level, age, and biological sex.
Read Stage
Verify stage G1 (normal) to G5 (kidney failure).
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ℹ️ About this Calculation
This nephrology and urology clinical calculator evaluates renal function, electrolyte/acid-base equilibrium, urinary excretion kinetics, and urologic disease risk according to KDIGO and AUA clinical practice guidelines.
Variable Glossary
Renal & Lab Metrics
Serum creatinine, urinary sodium/urea, albumin, PSA levels, or ultrasound kidney dimensions.
Diagnostic Indexes
eGFR (CKD-EPI equation), Fractional Excretion of Sodium (FENa %), serum anion gap, and PSA doubling kinetics.
How to Calculate Step-by-Step
Step 1
Enter serum electrolytes, creatinine, or urinary excretion lab values.
Step 2
Specify patient demographic parameters (age, gender, height/weight).
Step 3
View calculated clearance rates, CKD stage classification, or acute kidney injury (AKI) differentiation.