eGFR Calculator

This tool estimates adult kidney function using established eGFR formulas based on serum creatinine and demographic inputs. It supports CKD-EPI and MDRD equations to provide clinically relevant estimates for adult patients. Conceptually, eGFR represents how many milliliters of plasma the kidneys can filter per minute per 1.73 square meters of body surface area. The calculator adjusts for age, sex, and race according to the chosen formula, with optional inputs to refine estimates when data is available. Core value provided is eGFR in mL/min/1.73 m^2, plus a CKD stage suggestion derived from the result. The tool documents the underlying formulas and their assumptions, enabling reproducibility in research contexts. It also offers unit handling for creatinine inputs, accepting mg/dL or µmol/L values and converting between them as needed. Use cases include CKD risk stratification, pharmacokinetic considerations where kidney function is relevant, and population studies requiring consistent eGFR estimates across datasets. Unique value comes from exposing both CKD-EPI and MDRD options with transparent calculation steps and clear input validation. Typical workflows include entering a patient’s serum creatinine, age, sex, and race, selecting the preferred formula, and interpreting the resulting eGFR alongside CKD staging. The tool is suitable for clinicians, laboratory personnel, and researchers who need rapid, auditable estimates that align with established nephrology practice. Outputs are formatted with one decimal precision, and edge-case handling is described in the validation logic to ensure reliable results across common clinical scenarios.