What Does My eGFR Result Mean?
Use this eGFR Calculator to estimate your estimated glomerular filtration rate, a common kidney function number reported with blood tests. Enter your age, sex, and serum creatinine in mg/dL to get an estimated eGFR in mL/min/1.73 m².
The calculator uses the 2021 CKD-EPI creatinine equation, which does not include race. Your result can help you understand how creatinine relates to kidney filtration, but it cannot tell the full story of kidney health by itself.
eGFR can change with hydration, recent illness, muscle mass, pregnancy, certain medicines, and lab variation. Do not use this calculator for medication dosing decisions without a clinician.
Estimated eGFR
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Frequently Asked Questions
Answers to common questions about this page and how to use what you find here.
Sources
- National Kidney Foundation: eGFR Calculator
- National Institute of Diabetes and Digestive and Kidney Diseases: Estimated Glomerular Filtration Rate
- KDIGO 2024 Clinical Practice Guideline for CKD Evaluation and Management
- Inker LA, Eneanya ND, Coresh J, et al. New Creatinine- and Cystatin C-Based Equations to Estimate GFR without Race
This calculator is for general education only and is not a diagnosis, treatment plan, or substitute for advice from a qualified healthcare professional.
An eGFR Calculator estimates how well your kidneys filter blood using serum creatinine, age, and sex. It gives an estimated glomerular filtration rate in mL/min/1.73 m², which is a common lab value used to discuss kidney function. It does not diagnose kidney disease or replace medical review.
An eGFR of 90 or higher is often considered normal if there are no other signs of kidney damage. Results from 60 to 89 may be mildly decreased and can still be normal for some people. Trends, urine albumin, health history, and repeat testing matter more than one number.
A low eGFR means the kidneys may be filtering blood less than expected, but one result does not explain the cause. Dehydration, acute illness, muscle mass, certain medicines, and lab variation can affect creatinine and eGFR. A healthcare professional may compare prior results and order urine or blood tests.
No, do not use this eGFR Calculator for medication dosing decisions without a clinician. Drug dosing may require a specific kidney function estimate, current weight, body size, diagnosis, lab trend, and medicine details. Pharmacists and prescribers use clinical context that this calculator does not include.
The 2021 CKD-EPI creatinine equation estimates eGFR without a race coefficient. Major kidney organizations recommend race-free eGFR reporting to avoid race-based adjustments and support more consistent care. Like all creatinine-based equations, it still has limits and may be less accurate for some individuals.
Common tests related to eGFR include serum creatinine, BUN, BUN/Creatinine Ratio, and urine Albumin/Creatinine Ratio. Urine albumin can show kidney damage even when eGFR is in a higher range. Blood pressure, diabetes measures, electrolytes, and urinalysis may also help add context.