Calculate gross margins, markup percentages, and target selling prices.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. Zero egress.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
Choose whether to calculate from Cost & Revenue, Cost & Target Margin, or Cost & Target Markup.
Type in your product cost, retail price, or percentage targets.
View the exact gross profit, margin percentage, and markup multiplier with 1-click summary copy.
Margin is profit expressed as a percentage of revenue ((Revenue - Cost) / Revenue), whereas markup is profit expressed as a percentage of cost ((Revenue - Cost) / Cost).
Yes, markup can be greater than 100% (e.g., buying for $10 and selling for $30 is a 200% markup), while gross margin is always bounded below 100%.
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