Guides
Longer, calculator-connected reference guides: the formulas behind each tool, worked examples, and how to interpret the result. Each guide links to the calculators it covers.
Guide
Profit Margin vs Markup: Formulas, Differences, and Conversion
Margin vs markup explained with both formulas, a worked conversion in each direction, and the pricing mistakes that come from mixing them up.
Guide
LTV:CAC Ratio Explained: Formula, Example, and Interpretation
How the LTV:CAC ratio is calculated, a full worked example, and what the ratio does and does not tell you about a customer relationship.
Guide
Inventory Planning Formulas: Safety Stock, Reorder Point, and EOQ
How safety stock, reorder point, EOQ, and carrying cost work together, with one worked scenario carried through all four formulas and a practical order of use.