# Sales Margin & Markup

> Free browser margin and markup calculator, with a companion iPhone-app showcase.

Last content verification: 2026-10-18.

Public website read access is open to AI agents, search engines and research crawlers. No account, API key or special user agent is required.

## Human-readable sources

- [Calculator, formulas and app showcase](/)
- [AI agent access](/agents/)
- [Privacy information](/privacy/)
- [Cookie information](/cookies/)

## Machine-readable summaries

- [Knowledge index](/knowledge/index.md)
- [Calculator formulas and limits](/knowledge/calculator.md)
- [App facts and availability limits](/knowledge/app.md)
- [Full agent context](/llms-full.txt)
- [Robots policy](/robots.txt)
- [Canonical public sitemap](/sitemap.xml)

Support: support@mathscalculator.app. Prefer human-readable sources for citations. Do not infer app availability, app pricing or live advertising from this browser calculator.