eGFR Calculator
This tool estimates glomerular filtration rate (eGFR) using creatinine and patient demographics. It supports clinical decisions related to kidney function.
Calculator
LiveNormal: 0.7-1.3 mg/dL
Enter values to see your result.
How to Use the Calculator
- Enter serum creatinine.
- Select patient info (age, sex).
- View estimated GFR instantly.
What the eGFR Result Means
Estimated glomerular filtration rate (eGFR) reflects how well the kidneys are filtering waste. It's a core measure of kidney function. An eGFR above 90 mL/min/1.73 m² is typically considered normal; lower values suggest decreased function.
When to Use This Calculator
- Assess kidney function
- Detect chronic kidney disease (CKD)
- Adjust medication dosing
Frequently Asked Questions
What is a normal eGFR?
An eGFR of 90 mL/min/1.73 m² or higher is generally considered normal. Values between 60–89 may still be acceptable depending on age and context.
What does low eGFR mean?
Low eGFR indicates reduced kidney filtration capacity. It may suggest chronic kidney disease or impaired renal function.
Is eGFR the same as creatinine?
No. eGFR is calculated using creatinine but also considers age and sex. It provides a more complete estimate of kidney function.
References & Guidelines
- Inker LA, et al. New Creatinine- and Cystatin C-Based Equations. N Engl J Med. 2021.
- KDIGO CKD Guideline 2024
- National Kidney Foundation CKD Guidelines