GFR Calculator
eGFR = 175 × (Creatinine)^−1.154 × (Age)^−0.203 × (0.742 if female)175×1.0^−1.154×50^−0.203≈175×1.0×0.451≈79 mL/min
Free online tool
GFR Calculator
Enter your age, serum creatinine level and gender.
Instant calculation
GFR Calculator
Enter your age, serum creatinine level and gender.
Your result
Calculation
Your numbers stay in this browser. Nothing is uploaded or saved.
Three clear steps
How to use this calculator
- 01
Enter age
Type your age.
- 02
Enter creatinine
Type your serum creatinine level from a blood test.
- 03
Select gender
Choose male (0) or female (1) for the formula.
The formula
How this calculation works
Uses the MDRD formula to estimate kidney function from serum creatinine.
Check the method
Worked examples
Each example follows the same formula used by the calculator.
Age 50, creatinine 1.0 mg/dL, male — eGFR?
175×1.0^−1.154×50^−0.203≈175×1.0×0.451≈79 mL/min≈ 79 mL/min/1.73m²Common questions
Questions about this calculation
What is the GFR Calculator?
The GFR Calculator helps you estimate glomerular filtration rate to assess kidney function. Enter your values and select Calculate to get an instant result.
How is the result calculated?
Uses the MDRD formula to estimate kidney function from serum creatinine.
Can you show an example?
Example: Age 50, creatinine 1.0 mg/dL, male — eGFR? — ≈ 79 mL/min/1.73m².
Is my data saved when I use the GFR Calculator?
No. All calculations run locally in your browser. Your inputs and results are never uploaded, stored or shared with anyone.
Is the GFR Calculator free to use?
Yes. The GFR Calculator is completely free. No account, sign-up or payment is required. It works on mobile, tablet and desktop.
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