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Estimate your kidney function with our eGFR Calculator using the CKD-EPI equation. Enter your age, serum creatinine (mg/dL), select your gender, and indicate your race to calculate your estimated glomerular filtration rate (eGFR) in mL/min/1.73m².
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We don’t always think about our kidneys. They quietly do their job, working 24/7 to clean the blood, balance fluids, and flush out waste. But when something goes wrong, it can affect your entire body. That’s why knowing how well your kidneys are working is such a big deal.
One of the easiest ways to get a quick snapshot of your kidney function is through a number called eGFR. It stands for Estimated Glomerular Filtration Rate. And with our eGFR Calculator at Cystography.com, you can check yours in seconds.
Let’s break down what eGFR really means, why it’s important, and how our tool can help you stay on top of your kidney health.
In simple terms, your eGFR tells you how well your kidneys are filtering your blood.
Every minute, your kidneys filter out waste and send it to your bladder to leave your body as urine. This filtering happens inside tiny units called glomeruli—little clusters of blood vessels that act like mini strainers. If they’re damaged or not working well, your body starts holding onto waste it should be getting rid of.
Your eGFR number estimates how many milliliters of blood your kidneys can filter each minute. The number is adjusted for body size and expressed in units like “mL/min/1.73m².”
A normal eGFR is usually 90 or higher. Numbers below that might suggest there’s some kind of issue going on—even if you’re not feeling symptoms yet.
One of the best things about eGFR is how early it can catch problems.
Chronic kidney disease (CKD) often develops slowly and without obvious symptoms in the beginning. That means people can be living with reduced kidney function and not even realize it.
By checking your eGFR regularly—especially if you’re at risk—you can detect early signs of trouble. That opens the door for early treatment and lifestyle changes that may slow or even stop further damage.
In other words, eGFR gives you a chance to take control before things get worse.
You don’t need to be a doctor to use our calculator. We’ve designed it to be simple and straightforward.
Here’s what you’ll need to enter:
Once you plug in those details, the calculator gives you an estimated GFR. You’ll see your result immediately.
We use a trusted method called the CKD-EPI equation. It stands for “Chronic Kidney Disease Epidemiology Collaboration,” and it’s the formula many doctors rely on.
Why this formula? Because it’s one of the most accurate ways to estimate kidney function based on creatinine levels.
It adjusts the math based on your specific profile. For example:
All these adjustments help make your result more personal and accurate.
Once you have your number, what does it actually mean?
If your eGFR is under 60, it’s time to talk to your doctor about what it means for your health.
Not everyone needs to be checking this number regularly. But for certain people, it’s an essential part of staying healthy.
You should consider monitoring your eGFR if:
Even if you feel fine, a lower eGFR could be a warning sign. It’s better to catch a problem early, before symptoms appear.
Getting a low eGFR result can feel alarming—but it’s not always a sign of kidney failure. Sometimes it’s just a signal that your kidneys are under stress or that they’re aging naturally.
Still, it’s important to take it seriously. A low result should always prompt a discussion with your doctor. They may recommend:
The earlier you catch a decline, the more you can do to slow it down.
The best way to protect your kidneys is to keep your whole body healthy. Here are some everyday tips that can make a big difference:
Small changes can have a big impact—especially if you start early.
There are lots of eGFR calculators online, but here’s why ours stands out:
Plus, we built it with care. Our goal was to make something useful, easy to understand, and empowering. We want you to feel informed, not overwhelmed.
When it comes to kidney disease, what you don’t know can hurt you. That’s why eGFR is such a powerful tool. It’s like a window into your kidney function—a way to catch issues early and make changes before things get serious.
You don’t have to be a medical expert to care about your health. And you don’t need fancy equipment or a hospital visit to get basic insights. With our eGFR Calculator, all you need is a few numbers and a minute of your time.
Once you know your result, you can take that information to your doctor and start a conversation. Together, you can decide what (if anything) needs to change.
Kidneys are quiet workers. They don’t complain, but they’re absolutely essential to your health. Whether you’re managing a chronic condition or just keeping an eye on things, understanding your eGFR is one of the smartest steps you can take.
At Cystography.com, we’re here to help make that step easier.
Our eGFR Calculator isn’t just a digital tool—it’s a way to learn more about your body, take action early, and feel confident about your health. So go ahead, give it a try. Know your number. And don’t be afraid to ask your doctor what it means.
You deserve to understand what’s going on inside your body. Let us help you get started.