Estimate your Glomerular Filtration Rate (GFR) using our clinically accurate CKD-EPI-based calculator. GFR is a key measure of kidney function.
Scroll Down to CalculateEnter your details to estimate GFR using the CKD-EPI equation (2021, non-race-based).
Disclaimer: This tool is for informational purposes only and not a substitute for professional medical advice. Always consult with a healthcare provider for medical decisions.
The GFR calculator estimates kidney function using the CKD-EPI equation, the standard method for adults. Required inputs:
Wondering how to calculate GFR from creatinine? Enter your values above and our tool will instantly provide your estimated GFR.
Input the patient's age, sex, and serum creatinine level into the GFR calculator.
The calculator automatically applies the CKD-EPI equation to the provided data.
View the calculated GFR value in mL/min/1.73m² along with the kidney function stage.
GFR = 141 × min(SCr/k,1)α × max(SCr/k,1)-1.209 × 0.993age × sexFactor
Example: 50-year-old female, SCr = 1.0 mg/dL
GFR = 141 × min(1.0/0.7,1)-0.329 × max(1.0/0.7,1)-1.209 × 0.99350 × 1.018 ≈ 62 mL/min/1.73 m²
Related Tool: Creatinine Clearance Calculator
This calculator uses the CKD-EPI 2021 formula (non-race-based) for GFR estimation.
References:
This tool is for informational purposes only and not a substitute for professional medical advice. Always consult a healthcare provider for clinical decisions.
The GFR (Glomerular Filtration Rate) Calculator provides a quick and accurate estimation of kidney filtration function using the CKD-EPI formula. It helps assess renal health, adjust drug dosages, and monitor kidney disease progression.
Understanding your GFR can help determine stages of Chronic Kidney Disease (CKD). The table below shows the classification of kidney function based on GFR values.
| Category | GFR (mL/min/1.73 m²) | Interpretation |
|---|---|---|
| Normal or High | ≥90 | Normal kidney function (CKD Stage 1 if other evidence of kidney damage exists) |
| Mildly Decreased | 60–89 | Mild kidney damage (CKD Stage 2) |
| Moderately Decreased | 30–59 | Moderate decrease in kidney function (CKD Stage 3) |
| Severely Decreased | 15–29 | Severe decrease in kidney function (CKD Stage 4) |
| Kidney Failure | <15 | Kidney failure (CKD Stage 5); may require dialysis or transplantation |
Several formulas are used to estimate kidney function. Here's how the CKD-EPI formula compares with others:
Each formula serves different purposes. CKD-EPI is now the standard for GFR estimation in adults.
GFR is crucial in various clinical scenarios:
Understanding GFR values can significantly improve patient safety and treatment outcomes, especially in nephrology and internal medicine.
Normal GFR is typically ≥90 mL/min/1.73 m². Values below 60 may indicate chronic kidney disease, and values below 15 often indicate kidney failure requiring dialysis or transplantation.
GFR is calculated using the CKD-EPI formula, which uses age, sex, and serum creatinine. Enter your values above and the calculator will provide your estimated GFR.
The CKD-EPI 2021 formula is currently the most accurate and widely recommended for estimating GFR in adults.
Low GFR indicates reduced kidney function. It may be a sign of chronic kidney disease or kidney failure, especially if persistently low.
