# Sales Margin & Markup: full agent context Public website read access is open to AI agents, search engines and research crawlers. No account, API key or special user agent is required. --- title: "About Sales Margin & Markup" resource: "/" verified: "2026-10-18" build_context: "public" --- # About Sales Margin & Markup Sales Margin & Markup combines a free browser margin and markup calculator with a showcase of the companion iPhone app. It is intended for everyday pricing decisions. The website has no registration or paid tier. Public website read access is open to AI agents, search engines and research crawlers. No account, API key or special user agent is required. The planned hosting platform is Cloudflare Pages. Support: support@mathscalculator.app. The production origin is https://mathscalculator.app/; this is not evidence that a deployment is live. [Calculator and product information](/) · [Calculator facts](/knowledge/calculator.md) · [App facts](/knowledge/app.md) --- --- title: "Margin and markup calculator facts" resource: "/#calculator" verified: "2026-10-18" build_context: "public" --- # Margin and markup calculator facts The browser calculator accepts a non-negative cost, a non-negative percentage and either Margin or Markup mode. It calculates selling price, profit and the equivalent percentage. ## Formulas - Profit = selling price − cost. - Margin (%) = profit ÷ selling price × 100. - Markup (%) = profit ÷ cost × 100. - Selling price from margin = cost ÷ (1 − margin ÷ 100). - Selling price from markup = cost × (1 + markup ÷ 100). ## Worked examples For cost 100 and margin 35%, selling price rounds to 153.85, profit to 53.85 and equivalent markup to 53.85%. For cost 100 and markup 35%, selling price is 135.00, profit is 35.00 and equivalent margin rounds to 25.93%. ## Limits and rounding Margin must be below 100%; markup may exceed 100%. Negative values, malformed decimal input, scientific notation and separators are rejected. Cost accepts up to 12 integer digits and 6 fractional digits; percentage up to 6 integer digits and 6 fractional digits. Input uses a full stop for decimals. Both zero cost and zero percentage return zeros. Zero cost with a positive percentage is rejected because markup is undefined. Currency codes: AUD, USD, GBP, EUR, NZD, CAD, JPY, SGD. Currency selection labels values; it never converts amounts or fetches exchange rates. Monetary display uses 2 decimal places except JPY, which uses 0. Percentages display 2 places; display rounding is half-up. Calculations use decimal arithmetic with 80 significant digits internally. Taxes, fees, discounts and currency conversion are not included. This is a pricing estimate, not accounting advice. Entered figures remain in the open browser page; no figures are included in these resources. [Use the calculator](/#calculator) · [Visible explanations](/#how-it-works) --- --- title: "Companion iPhone app" resource: "/#the-app" verified: "2026-10-18" build_context: "public" --- # Companion iPhone app The iPhone app is named Sales Margin & Markup in the inspected project source. Source-verified features include cost, selling price, profit, margin and markup calculations, eight currency labels and built-in formula explanations. The showcase uses genuine existing app imagery. App Store availability is not independently verified. No download URL, app price, rating or minimum operating-system version is asserted. The free browser calculator and the native iPhone app are separate products; free website use does not establish the app price. [Read the app showcase](/#the-app) --- --- title: "Privacy and data handling" resource: "/privacy/" verified: "2026-10-18" build_context: "public" --- # Privacy and data handling Calculations run in browser memory. The site does not save entered figures across visits, include them in URLs or send them to advertising or analytics services. Reloading resets the editable example. The current build loads no live advertising or analytics and sets no site cookies or browser storage. The local preview server may log file requests and local connection information; it does not receive calculator inputs. When hosted, the hosting provider may process ordinary request metadata; operator disclosures must reflect the actual deployment. A future live advertising integration will require updated disclosures and any applicable consent controls. Support and privacy questions: support@mathscalculator.app. Prefer the full human-readable pages for privacy statements. [Privacy information](/privacy/) · [Cookie information](/cookies/) --- --- title: "AI agent access policy" resource: "/agents/" verified: "2026-10-18" build_context: "public" --- # AI agent access policy Public website read access is open to AI agents, search engines and research crawlers. No account, API key or special user agent is required. Crawl policy is described in [robots.txt](/robots.txt). Crawl permission is not a transfer of copyright or a separate content licence. It does not authorise personal-data access or changes to the website. Prefer the linked human-readable page for citations, and distinguish source-verified app features from verified App Store availability. The machine-readable resources are site-specific Markdown summaries with title, resource, verified and build_context metadata. No OKF certification or search-ranking effect is claimed. This is read-only information access. There is no remote calculator API or server-side agent action. The calculator can be used through its accessible browser controls when the page is open. [AI agent access page](/agents/) · [Knowledge index](/knowledge/index.md)