Guides
Longer explanations that sit above a single calculator — how to work through a calculation by hand, and how to choose between calculators that answer related but different questions. Each is built from the same cited reference data as the calculators it links to.
Which Body Weight to Use for Drug Dosing
A decision guide to total, ideal, and adjusted body weight, built from the same rules PharmCalc’s dosing-weight calculator applies.
How to Calculate Creatinine Clearance (Cockcroft–Gault)
The Cockcroft–Gault formula, step by step, with a full worked example and the situations where the estimate should not be trusted.
Creatinine Clearance vs eGFR
Cockcroft–Gault creatinine clearance and a laboratory-reported eGFR answer different questions with different equations — substituting one for the other can change a dosing decision.
How to Use Alligation for Pharmacy Compounding
The alligation alternate method for mixing two preparations of known strength to a required strength in between, with a full worked example.