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GFR Calculator — 2021 CKD-EPI eGFR with CKD Stage (Race-Free)

Free eGFR calculator using the 2021 CKD-EPI race-free equation. Enter creatinine, age, and sex to get your kidney function, CKD stage, normal ranges by age, and what your number means.

✓ Formula verified: January 2026For informational purposes only
Goal

GFR Calculator

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years
eGFR (2021 CKD-EPI)
68.6 mL/min/1.73m²

An eGFR of 68.6 (60–89) is common and only indicates kidney disease if accompanied by other markers like protein in the urine. Doctors look for a confirmed trend over 3+ months, not one value.

CKD Stage

▲ Stage 2 — Mildly decreased kidney function

Kidney Function Level

▲ Mildly reduced

Formula

2021 CKD-EPI Creatinine Equation (race-free)

Important Medical Notice

▼ This eGFR is an estimate. Clinical decisions should consider the full clinical context including trends over time, other lab values, and patient history. Confirm with a healthcare provider.

What if your age changes? 45 years → 70.8 mL/min/1.73m² · 50 years → 68.6 mL/min/1.73m² · 55 years → 66.5 mL/min/1.73m²

Scenario Comparison

Conservative (5%)
$16,470.09
$6,470.09 interest
Your scenario (7%)
$20,096.61
$10,096.61 interest
Aggressive (10%)
$27,070.41
$17,070.41 interest
High-risk (14%)
$40,224.71
$30,224.71 interest
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CKD Stage Reference

eGFR: 68.6 mL/min/1.73m²

01530456090120+
StageeGFR RangeDescriptionYour Result
Stage 1≥ 90Normal kidney function
Stage 260–89Mildly decreasedCurrent
Stage 3a45–59Mildly to moderately decreasedCurrent
Stage 3b30–44Moderately to severely decreasedCurrent
Stage 415–29Severely decreasedCurrent
Stage 5< 15Kidney failure

2021 CKD-EPI Update — Race-Free

This calculator uses the 2021 CKD-EPI creatinine equation, which removed the race coefficient that was present in earlier versions. The NKF and ASN task force recommended this change because race-based adjustments perpetuated health disparities. The 2021 equation is now the recommended standard for all adults in the United States.

Clinical Warning — Educational Use Only

This eGFR estimate is for educational purposes only. It does not constitute a medical diagnosis. All clinical decisions regarding kidney disease diagnosis, staging, medication dosing, or treatment must be made by a licensed healthcare provider using the full clinical context including patient history, physical exam, and additional laboratory values. A single eGFR value should not be used in isolation for clinical decision-making.

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Related Guides (14)

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GFR — glomerular filtration rate — is the gold-standard measure of kidney function. This guide explains what GFR is, how it is measured, what a normal range looks like, and why your eGFR number is one of the most important health metrics you should know.
Normal GFR by Age: What Should Your eGFR Be at 40, 50, 60, 70 and Beyond?
GFR naturally declines with age — but how much decline is normal, and when does normal aging become kidney disease? This guide provides eGFR ranges by decade, explains the aging-disease distinction, and helps you understand your numbers in context.
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Your eGFR result can vary by up to 20% depending on which formula your lab uses. This guide compares CKD-EPI 2021, MDRD, and Cockcroft-Gault — how they work, which is most accurate, and what the 2021 race-free change means for your numbers.
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Your lab report shows eGFR — but what does that number actually mean? This guide walks you through how to read your GFR results, understand your CKD stage, and know what questions to ask your doctor.
Can You Improve Your GFR? Science-Based Strategies to Slow Decline and Protect Kidneys
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Kidney-Friendly Diet: What to Eat to Protect Kidney Function at Every CKD Stage
What you eat directly affects your kidney function. This guide covers the kidney-friendly diet for every CKD stage — which foods protect your GFR, which to limit, and how to balance sodium, potassium, phosphorus, and protein.
The 2021 Race-Free eGFR: Why Kidney Function Testing Changed and What It Means for You
The 2021 race-free CKD-EPI equation removed the race coefficient that had been part of GFR estimation for decades. This guide explains why the change was made, how it affects eGFR numbers, and why it leads to better kidney care for all patients.
What Is GFR? Understanding Glomerular Filtration Rate and Kidney Health
GFR stands for glomerular filtration rate and it is the single most important number for kidney health. Here is what it means, how it is measured, and when to worry.
Can You Improve Your GFR? Science-Based Strategies to Protect Kidney Function
If your eGFR is low, you probably want to know if you can improve it. Here is what the evidence says about which strategies actually work and what is unrealistic.
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Diet plays a crucial role in managing kidney disease. Here is a science-based guide to what to eat and avoid at each CKD stage, with practical meal planning tips.
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Not all GFR formulas give the same result. The CKD-EPI 2021 is the current gold standard. Here is how the major equations compare and why the change matters for accurate diagnosis.
The 2021 Race-Free eGFR — Why It Changed and What It Means for Patients
Until 2021, GFR equations used a race multiplier. Here is why it was removed, how it affected patient care, and what the change means for more equitable kidney disease diagnosis.
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