Margin Calculator

The margin calculator computes profit margin, markup, sale price, and total profit from a cost and a markup, entered as either a percent or a fixed amount. Each row produces its own sale price, profit, gross margin percentage, and markup percentage, and a weighted summary rolls those figures up across every item to show performance across a full catalog rather than any single line.

Currency symbol and decimal precision adjust to match a regional reporting format. A catalog can be bulk-loaded through CSV import, a scenario saved through JSON export, and key totals copied out for a report. A built-in stock trading calculator estimates margin required for a position, and a currency exchange calculator works out notional value and margin at common leverage ratios.

Testing markup options against a formula-driven output, before publishing prices or placing a trade, is how a pricing or trading decision gets checked ahead of time rather than after the fact.

Cost and a markup, entered as either a percent or a fixed amount, are what the calculation runs on; sale price, profit, gross margin, and markup percentage follow from that pair for each row. Multiple rows price multiple products or services at once, and a summary totals cost, sales, and profit across every row while weighting gross margin and markup by actual volume rather than averaging rows equally.

• Cost and Markup Type (percent or amount) set up each row; Markup Value then determines Sale Price, Profit, Gross Margin %, and Markup % for that row.
• Multiple rows price multiple products or services in the same catalog.
• The Summary totals Total Cost, Total Sales, and Total Profit, and reports Weighted Gross Margin % and Weighted Markup % across all rows.
• Currency symbol and Precision match the output to a reporting format.
• JSON export and JSON or CSV import save a full session or bulk-load a catalog of items.

Symbols: C = cost, m% = markup percent, m$ = markup amount, S = sale price, P = profit, GM% = gross margin percent.

Percent mode: S = C × (1 + m%/100); P = S − C; GM% = (P ÷ S) × 100; Markup% = m%.

Amount mode: S = C + m$; P = m$; GM% = (m$ ÷ S) × 100; Markup% = (m$ ÷ C) × 100.

Totals: Total Cost = ΣCᵢ; Total Sales = ΣSᵢ; Total Profit = ΣPᵢ; Weighted GM% = (Total Profit ÷ Total Sales) × 100; Weighted Markup% = (Total Profit ÷ Total Cost) × 100.

CSV Import: Headers are Item, Cost, MarkupType (% or Amount), MarkupValue, and optional Notes. Case and spacing do not matter.

JSON Export/Import: Rows, settings, and calculator state save as a file to back up work, share a template, or resume pricing later.

Pricing products, modeling profits, and planning trades reduce to the same underlying calculation. Weighted summaries reflect real catalog performance rather than a simple average across items.

• Set retail or ecommerce pricing by testing markup percent versus fixed amount and comparing sale prices side by side.
• Forecast campaign profitability by importing a product list, adjusting markups, and reviewing weighted gross margin.
• Quote services with consistent markup rules and documented notes for approvals and audit trails.
• Estimate stock margin by combining price, shares, and broker requirement to confirm available buying power.
• Check forex margin by combining exchange rate, units, and leverage ratio to plan position sizing.
• Share scenarios by exporting JSON, or reload saved scenarios to refine plans with teammates.

Sale Price is what to charge after markup. Profit equals sale price minus cost. Gross Margin % measures profit as a share of sale price, which supports comparisons across items. Markup % expresses profit as a share of cost, which helps align on a pricing policy. Weighted metrics in the summary reflect real mix and volume, so they represent overall performance better than a simple average.

A $20 item with a 40% markup gives a $28 sale price, $8 profit, and 28.57% gross margin. Switching to a $6 fixed markup on the same item gives a $26 sale price, $6 profit, and 23.08% gross margin. A CSV import of ten items rolls up to a total cost, total sales, and weighted gross margin for the full set. For trading, a $45 stock price, 200 shares, and a 30% requirement estimates the margin needed for the position. For currency, a 1.0950 rate, 10,000 units, and 50:1 leverage gives the notional value and required margin.

Markup measures profit relative to cost. Margin measures profit relative to sale price. A 50% markup on $20 yields a $30 price and a 33.33% margin. Margin fits financial reporting; markup fits operational pricing rules.

Percent keeps relative pricing consistent across different costs. Amount holds a fixed dollar gain or a minimum dollar floor regardless of cost. Comparing both modes on the same item shows which policy fits the goal at hand.

Yes. Weighted gross margin and weighted markup account for item mix and sales volume, which produces a more accurate picture of overall profitability than a simple average.