Estimate your Glomerular Filtration Rate (GFR), a measure of kidney function, using the MDRD formula. This is informational only — always consult a doctor for medical decisions.
Glomerular Filtration Rate estimates how well your kidneys filter waste from blood, commonly used to assess kidney function.
This tool uses the simplified MDRD formula: GFR equals 175 times serum creatinine to the power of negative 1.154, times age to the power of negative 0.203, multiplied by 0.742 for women.
Enter your serum creatinine level from a blood test, your age, and gender, then click Calculate.
Example: A GFR above 90 generally indicates normal kidney function, while values below 60 for three months or more may indicate chronic kidney disease.
Is this a diagnosis. No, this tool is for educational purposes only. Only a doctor can properly diagnose kidney conditions.
What affects creatinine levels. Muscle mass, diet, hydration, and certain medications can all affect creatinine readings.