GFR Calculator
Our GFR (Glomerular Filtration Rate) Calculator helps assess kidney function by estimating how well your kidneys are filtering waste from your blood. GFR is a critical indicator for individuals with kidney health concerns. By entering key details such as age, gender, weight, and serum creatinine levels, you’ll receive a GFR value, which helps determine the stage of kidney function. Early detection of kidney issues can aid in managing and preventing kidney disease.
What is Glomerular filtration rate (GFR)?
Glomerular filtration rate describes the rate of flow of filtered fluids through the kidney and is used as a measure of kidney function. Generally, a higher value of GFR indicates better kidney function. A significant decrease in GFR indicates that the kidney is not properly functioning, resulting in lower volumes of fluids being filtered over a given time. The normal range of GFR adjusted for body surface area is 100 to 130 mL/min/1.73m2 in men and 90 to 120mL/min/1.73m2 in women below the age of 40. After age 40, GFR decreases progressively with age. Refer to the table below for population mean estimated GFR for a number of age ranges.
Population Mean Estimated GFR
| Age | Mean Estimated GFR (mL/min/1.73 m2) |
| 20-29 | 116 |
| 30-39 | 107 |
| 40-49 | 99 |
| 50-59 | 93 |
| 60-69 | 85 |
| 70+ | 75 |