Keystone Pricing Calculator

About this calculator

Keystone pricing is the traditional retail rule of setting the sell price at exactly double the wholesale or unit cost (retail = cost × 2), which works out to a clean 50% gross margin on the sale price. It originated in independent retail — jewellery, apparel, furniture, hardware — as a fast rule of thumb that covers overhead, shrinkage, markdowns and profit without a spreadsheet.

This calculator takes a unit cost and returns the keystone retail price, the profit per unit and the resulting margin percentage, so a shop owner or wholesaler can quickly check whether a straight doubling still makes sense for a given product, or whether thinner-margin categories like electronics need a different multiplier.