Knowledge Base

Frequently Asked Questions

Comprehensive answers to your questions about eGFR calculation, kidney function, CKD stages, and how to use our free online calculator effectively.

Verify Units

Always check if your creatinine is in mg/dL or µmol/L before calculating

Track Over Time

Single values matter less than trends - track your eGFR regularly

Consult Professionals

Always discuss results with your healthcare provider for proper interpretation

Lifestyle Matters

Blood pressure, diet, and exercise significantly impact kidney health

eGFR Basics Calculation Equations CKD Stages & Interpretation Testing & Monitoring Medications & Kidney Function Lifestyle & Prevention Special Populations Using Our Calculator

eGFR Basics

Understanding fundamental concepts of kidney function measurement

Calculation Equations

Learn about different eGFR calculation formulas and their applications

CKD Stages & Interpretation

Understanding chronic kidney disease stages and what they mean

Testing & Monitoring

Information about kidney function tests and monitoring schedules

Medications & Kidney Function

How medications interact with kidney health and function

Lifestyle & Prevention

Diet, exercise, and lifestyle factors for kidney health

Special Populations

eGFR considerations for specific groups

Using Our Calculator

Help and guidance for using the eGFR Calculator tool

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Try Our Free eGFR Calculator

Now that you understand eGFR, use our accurate, privacy-focused calculator to estimate your kidney function using the latest CKD-EPI 2021 equations.

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Medical Disclaimer: The information provided on this page is for educational purposes only and should not be considered medical advice. Always consult with a qualified healthcare provider for diagnosis, treatment, and answers to your medical questions.

Frequently Asked Questions

Verify Units

Track Over Time

Consult Professionals

Lifestyle Matters

eGFR Basics

What is eGFR and why is it important?

What is the difference between GFR and eGFR?

What factors affect eGFR calculations?

How is creatinine related to kidney function?

What is Cystatin C and when is it used?

Calculation Equations

What is the CKD-EPI 2021 equation?

Why was race removed from the eGFR equation?

What is the CKD-EPI creatinine-cystatin C equation?

When should I use the Cockcroft-Gault formula?

Is there a specific equation for children?

CKD Stages & Interpretation

What are the stages of Chronic Kidney Disease (CKD)?

What does it mean if my eGFR is between 60-89?

My eGFR is below 60. What should I do?

How quickly does kidney function typically decline?

Can kidney function improve after declining?

Testing & Monitoring

How often should I check my eGFR?

Do I need to fast before an eGFR test?

Why might my eGFR fluctuate between tests?

What other tests are important for kidney health?

Should I track my eGFR results over time?

Medications & Kidney Function

Why do medication doses need adjustment based on eGFR?

Which common medications can harm the kidneys?

Can I take metformin with reduced kidney function?

Are there medications that protect kidney function?

Should I stop my medications if my eGFR drops?

Lifestyle & Prevention

What diet is best for kidney health?

How much water should I drink for kidney health?

Can exercise improve kidney function?

Does smoking affect kidney function?

How does alcohol affect the kidneys?

Special Populations

How is eGFR different in elderly patients?

Is eGFR accurate in pregnant women?

What about eGFR in athletes or bodybuilders?

How does diabetes affect eGFR interpretation?

Are eGFR results different after kidney transplant?

Using Our Calculator

How accurate is this free online eGFR calculator?

What creatinine units should I use?

Do I need to enter Cystatin C?

What does 'Standardized Assays' mean?

Is my data saved or shared?

Can I use this calculator for medical decisions?

Try Our Free eGFR Calculator