Gfr Calculator
Estimate glomerular filtration rate using CKD-EPI, MDRD, and Cockcroft-Gault equations. Enter values for instant results with step-by-step formulas.
Formula
Cockcroft-Gault: CrCl = [(140-age) x weight(kg)] / [72 x Scr] x 0.85 if female | CKD-EPI 2021 (race-free)
Cockcroft-Gault estimates creatinine clearance. CKD-EPI 2021 is the current standard for eGFR. Stages: >90 normal, 60-89 mild decrease, 30-59 moderate, 15-29 severe, <15 kidney failure.
Frequently Asked Questions
How is GFR estimated and what does it indicate?
Glomerular Filtration Rate estimates kidney function. The CKD-EPI equation uses creatinine, age, and sex. Normal GFR is above 90 mL/min/1.73m^2. Stages: 60-89 (mild decrease), 30-59 (moderate), 15-29 (severe), below 15 (kidney failure). GFR guides medication dose adjustments for renally-cleared drugs.
What formula does Gfr Calculator use?
The formula used is described in the Formula section on this page. It is based on widely accepted standards in the relevant field. If you need a specific reference or citation, the References section provides links to authoritative sources.
Is Gfr Calculator free to use?
Yes, completely free with no sign-up required. All calculators on NovaCalculator are free to use without registration, subscription, or payment.
Can I use Gfr Calculator on a mobile device?
Yes. All calculators on NovaCalculator are fully responsive and work on smartphones, tablets, and desktops. The layout adapts automatically to your screen size.
Can I share or bookmark my calculation?
You can bookmark the calculator page in your browser. Many calculators also display a shareable result summary you can copy. The page URL stays the same so returning to it will bring you back to the same tool.
Is my data stored or sent to a server?
No. All calculations run entirely in your browser using JavaScript. No data you enter is ever transmitted to any server or stored anywhere. Your inputs remain completely private.