GFR Calculator

Estimate your Glomerular Filtration Rate (GFR) to monitor and assess kidney function.

Patient Metrics

Estimate Glomerular Filtration Rate (CKD-EPI 2021).

Creatinine

Age (Years)

Biomedical Sex

Clinical Note

This calculator uses the race-independent CKD-EPI 2021 equation, currently the recommended standard for initial assessment.

Understanding the GFR Calculator (CKD-EPI)

Estimate Glomerular Filtration Rate (GFR) to assess kidney function using serum creatinine, age, and gender.

Guide

How to use the GFR Calculator (CKD-EPI)

1Enter your serum creatinine level (mg/dL or µmol/L).
2Input your age in years.
3Select your biomedical sex.
4View your estimated GFR and corresponding kidney disease stage.

Applications

Common Use Cases

Medical Screening: Routine checkups for kidney health.

Disease Monitoring: Tracking progression of Chronic Kidney Disease (CKD).

Medication Safety: Adjusting drug dosages for reduced kidney function.

The Maths Behind the Calculation

CKD-EPI 2021 Equation

The Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) 2021 formula is the current standard recommended by the National Kidney Foundation, as it removes race as a variable for more equitable assessment.

Knowledge Base

Frequently Asked Questions

What is GFR?

Glomerular Filtration Rate (GFR) estimates how much blood passes through the glomeruli (tiny filters in the kidneys) each minute.

What is a normal GFR?

A GFR of 90 or higher is considered normal. A GFR below 60 for three months or more may indicate chronic kidney disease.

Regional Notice: United States

"Federal tax estimates are based on 2024 brackets. Consult a tax professional for official filing."

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