GFR Calculator (Glomerular Filtration Rate)

Calculate glomerular filtration rate to assess kidney function. Uses CKD-EPI or MDRD equations.

Serum creatinine (mg/dL)

Age

Sex

Calculation method

Estimated GFR

94.6 mL/min/1.73m²

CKD Stage 1: Normal or high

Kidney disease stages

Stage 1: Normal or high (≥90)90-120 mL/min

Stage 2: Mildly decreased (60-89)60-89 mL/min

Stage 3: Moderately decreased (30-59)30-59 mL/min

Stage 4: Severely decreased (15-29)15-29 mL/min

Stage 5: Kidney failure (<15)0-14 mL/min

Recommendation

Kidney function is normal. Continue healthy lifestyle.

This calculator is for informational purposes only and does not replace professional medical evaluation. Consult a nephrologist for result interpretation.

What is GFR?

Glomerular Filtration Rate measures how well the kidneys filter blood. It's the best indicator of kidney function and is expressed in mL/min/1.73m².

Kidney disease stages

Chronic kidney disease is classified into 5 stages based on GFR. Stage 1 indicates normal function, while stage 5 indicates kidney failure requiring dialysis or transplant.

Factors affecting GFR

GFR naturally decreases with age. Other factors include diabetes, hypertension, cardiovascular disease, and certain medications.