eGFR Calculator
Kidney function estimate from serum creatinine.
Enter your values
Enter the serum creatinine in mg/dL.
Enter the age in years.
Choose one of: Male, Female.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- eGFR
- 79 mL/min/1.73 m²
- CKD stage
- G2 — mildly reduced
- Interpretation
- Not indicative of CKD without other markers
Quick answer
Estimated GFR grades kidney function; the 2021 CKD-EPI creatinine equation is the current standard and omits a race coefficient.
At a glance
| What it does | Kidney function estimate from serum creatinine. |
|---|---|
| Category | Health |
| Inputs needed | Serum creatinine, Age, Sex |
| Main output | eGFR |
| Cost | Free — no sign-up, no download |
How to use the eGFR Calculator
- 1Enter serum creatinine in mg/dL.
- 2Add age and sex.
- 3Read eGFR and the corresponding CKD stage.
Inputs explained
- Serum creatinine(mg/dL)
- Enter the serum creatinine in mg/dL.
- Age(years)
- Enter the age in years.
- Sex
- Choose one of: Male, Female.
Worked example
Using the values the calculator loads with:
Inputs
- Serum creatinine1.1 mg/dL
- Age55 years
- SexMale
Results
- eGFR79 mL/min/1.73 m²
- CKD stageG2 — mildly reduced
- InterpretationNot indicative of CKD without other markers
Frequently asked questions
Why did the race coefficient go?
The 2021 CKD-EPI refit removed it because race is a social, not biological, variable and its use delayed care for Black patients.
Is eGFR alone enough to diagnose CKD?
No. CKD requires reduced eGFR or kidney damage markers such as albuminuria persisting over three months.
What do I need to enter into the eGFR Calculator?
Just 3 values: serum creatinine, age, sex. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the eGFR Calculator work out the answer?
Estimated GFR grades kidney function; the 2021 CKD-EPI creatinine equation is the current standard and omits a race coefficient. The working is shown step by step so you can verify the result by hand.
Is the eGFR Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.