Plain explanations of the equations behind all eight MedCalcTools calculators, each tied to a named, published source. See the Clinical Calculator Formulas Reference (2026) for the full table with citations.
What body mass index measures, its CDC categories, and where it falls short.
Read and calculate →What A1C measures, how it maps to estimated average glucose, and the ADA categories.
Read and calculate →How creatinine clearance is estimated, which weight to use, and how it differs from eGFR.
Read and calculate →Why the race variable was removed and how eGFR maps to CKD stage.
Read and calculate →The Payne formula, why albumin matters, and its known limits.
Read and calculate →The Mosteller formula and why BSA is used for dosing references.
Read and calculate →How LDL is estimated from a lipid panel, and when it is not valid.
Read and calculate →The Katz and Hillier correction factors and why glucose dilutes sodium.
Read and calculate →