Kidney Function Calculator

Medical Disclaimer: This information is for educational purposes only and should not replace professional medical advice. Always consult with your healthcare provider before making any changes to your medications or treatment plan.

What is eGFR?

eGFR (estimated Glomerular Filtration Rate) is the most important measure of kidney function. It tells us how well your kidneys are filtering waste from your blood. The higher your eGFR, the better your kidney function.

Your kidneys contain millions of tiny filters called glomeruli. These filters remove waste and excess fluid from your blood. The eGFR measures how much blood these filters can clean in one minute, adjusted for your body size.

The calculation uses your age, gender, race, and serum creatinine level to estimate your kidney function. While this provides a good estimate, it's not a substitute for professional medical evaluation.

Normal Kidney Function Ranges

eGFR Range	Stage	Description	Action
≥90	Normal	Normal kidney function	Regular check-ups
60-89	Mildly Reduced	Mild kidney damage	Monitor regularly
45-59	Stage 3a	Moderate kidney damage	See nephrologist
30-44	Stage 3b	Moderate to severe damage	Regular monitoring
15-29	Stage 4	Severe kidney damage	Close monitoring
<15	Stage 5	Kidney failure	Immediate attention

When to See a Nephrologist

eGFR below 60

Persistent low kidney function requires specialist evaluation

Protein in urine

Proteinuria indicates kidney damage and needs evaluation

Risk factors present

Diabetes, high blood pressure, or family history of kidney disease

Unexplained symptoms

Fatigue, swelling, or changes in urination patterns

Find a nephrologist: Use our comprehensive directory to locate kidney specialists in your area.

Kidney Function Calculator - Assess Your Kidney Health