GFR Calculator
Estimate your Glomerular Filtration Rate for kidney function.
Health
eGFR Result
84.4
mL/min/1.73 m²
Stage 2 — Mildly ↓
CKD Stage Reference
Stage 1≥ 90 mL/minNormal or High
Stage 260–89 mL/minMildly Decreased
Stage 3a45–59 mL/minMild-Moderate ↓
Stage 3b30–44 mL/minModerate-Severe ↓
Stage 415–29 mL/minSeverely Decreased
Stage 5< 15 mL/minKidney Failure
The Comprehensive Guide to GFR Calculator — Kidney Function
What is a GFR Calculator — Kidney Function?
The GFR Calculator estimates your Glomerular Filtration Rate — a measure of how well your kidneys are filtering waste from your blood. It uses the CKD-EPI 2021 equation, the current clinical standard.
The Mathematical Formula
Gfr Analysis Model
This tool utilize standardized mathematical formulas and logic to calculate precise Gfr results.
Calculation Example
A 45-year-old male with creatinine of 1.1 mg/dL:
- eGFR ≈ 84.5 mL/min/1.73 m²
- Stage 2 — Mildly Decreased (but generally acceptable)
Strategic Use Cases
- CKD Screening: Early detection of declining kidney function.
- Drug Dosing: Many medications require dose adjustments based on renal function.
Frequently Asked Questions
How accurate is this calculator?
This uses the CKD-EPI 2021 formula, the current clinical standard. However, lab-measured GFR may differ. Always consult your doctor.
Is this tool free to use?
Yes, all our calculators are 100% free to use.