GFR Calculator
eGFR Calculator
Calculate Estimated Glomerular Filtration Rate (eGFR) using the latest CKD-EPI 2021 race-free equation to accurately assess renal function and stage Chronic Kidney Disease.
Patient Variables
Clinical Precision & Methodology
This calculator utilizes the 2021 CKD-EPI (Chronic Kidney Disease Epidemiology Collaboration) equation, which is recommended by the National Kidney Foundation (NKF) and the American Society of Nephrology (ASN). It intentionally removes race coefficients for equitable assessment.
Modern Clinical Standard
Replaces older formulas like Cockcroft-Gault and MDRD. The 2021 CKD-EPI formula is currently the gold standard for staging chronic kidney disease globally.
Race-Free Algorithm
Eliminates the Black/Non-Black racial multiplier found in the 2009 equations, ensuring unbiased diagnostic criteria for renal impairment.
Thermal Receipt Export
Generates a high-resolution, perfectly scaled PNG image designed specifically for 80mm thermal printers, enabling instant clinical handouts.
CKD Staging Guide
How GFR Calculator Works
Our high-performance online utility runs entirely client-side, processing your files securely and instantly inside your web browser. For related functions, you can also use our All Medical Tools and BP Analyzer utilities.
Enter Age
Step-by-step interactive processing designed for simple, fast, and high-fidelity execution.
Select Gender
Step-by-step interactive processing designed for simple, fast, and high-fidelity execution.
Enter Creatinine
Step-by-step interactive processing designed for simple, fast, and high-fidelity execution.
CKD-EPI Equation
Designed for professional results, privacy, and maximum compatibility across all modern desktop and mobile browsers:
CKD-EPI 2021
Full digital precision and optimized performance with zero server-side latency or external data transfers.
Race-Free Formula
Full digital precision and optimized performance with zero server-side latency or external data transfers.
Kidney Function
Full digital precision and optimized performance with zero server-side latency or external data transfers.
Clinical Use
Full digital precision and optimized performance with zero server-side latency or external data transfers.
Frequently Asked Questions About GFR
Is this GFR calculator free?
Yes. Calculate eGFR with no registration.