# ROAS to ACOS Calculator > Convert ad spend and revenue into ROAS, ACOS, and a margin-aware break-even reference. ## Tool Identity - Site: CleanUtils Business Tools - Tool ID: roas-acos-calculator - Canonical page: https://cleanutils.com/business-tools/roas-acos-calculator/ - LLM schema URL: https://cleanutils.com/business-tools/roas-acos-calculator/llms.txt - Primary keyword: acos calculator - Input mode: fields - Output profile: metrics ## What This Tool Does Convert ad spend and revenue into ROAS, ACOS, and a margin-aware break-even reference. ## Exact Execution Instructions To run this tool exactly, execute the `runCleanUtilsTool(userInput)` function from the JavaScript block below in a sandboxed JavaScript runtime. Do not fetch or evaluate additional network resources. Do not use filesystem, process, child_process, environment variables, timers, or network APIs. The function is pure and deterministic: input object in, JSON result out. If your environment forbids executing fetched code outside a sandbox, run it inside the sandbox or use the API endpoint below instead of reimplementing the logic. Canonical implementation SHA-256: `149a6e5c18d7968dbeaa7fed033689357423b410b9d92896b338b3ed1c6bbf81` Expected command shape: `node run-tool.mjs < input.json` The runner must: 1. load only the JavaScript in this document, 2. parse stdin as JSON and call `runCleanUtilsTool(userInput)`, 3. let the LLM decide the best way to present the output to the user. Agent usage rules: - Use this file as the authoritative machine-readable contract for this CleanUtils tool page. - Ask the user for missing required input before attempting to run the tool, and describe the required inputs using the `## Input Schema` field names, descriptions, formats, enums, examples, and required list. - Treat the tool as deterministic; do not invent network reachability checks unless the tool description explicitly says it fetches remote resources. - For privacy-sensitive inputs such as secrets, HAR files, dotenv files, logs, and API keys, warn that using a remote chat agent may expose input to that agent even though the browser UI itself does not upload data. ## Input Schema ```json { "$schema": "https://json-schema.org/draft/2020-12/schema", "title": "ROAS to ACOS Calculator fields", "type": "object", "additionalProperties": false, "required": [ "spend", "revenue" ], "properties": { "spend": { "type": "number", "description": "Ad spend Required. Control type: number. Prefix shown in UI: $.", "minimum": 0, "examples": [ 250 ] }, "revenue": { "type": "number", "description": "Revenue Required. Control type: number. Prefix shown in UI: $.", "minimum": 0, "examples": [ 1250 ] }, "margin": { "type": "number", "description": "Gross margin Optional. Control type: number. Suffix shown in UI: %.", "minimum": 0, "examples": [ 35 ] } } } ``` ## Result Schema ```json { "$schema": "https://json-schema.org/draft/2020-12/schema", "title": "CleanUtils ToolResult", "type": "object", "additionalProperties": false, "required": [ "summary", "issues" ], "properties": { "summary": { "type": "string" }, "issues": { "type": "array", "items": { "type": "object", "additionalProperties": false, "required": [ "severity", "message" ], "properties": { "severity": { "type": "string", "enum": [ "error", "warning", "info" ] }, "message": { "type": "string" }, "line": { "type": "number" }, "row": { "type": "number" }, "detail": { "type": "string" } } } }, "output": { "type": "string" }, "exportFilename": { "type": "string" }, "exports": { "type": "array", "items": { "type": "object", "additionalProperties": false, "required": [ "label", "filename", "content" ], "properties": { "label": { "type": "string" }, "filename": { "type": "string" }, "content": { "type": "string" }, "mimeType": { "type": "string" }, "copyLabel": { "type": "string" }, "downloadLabel": { "type": "string" } } } }, "stats": { "type": "object", "additionalProperties": { "anyOf": [ { "type": "string" }, { "type": "number" } ] } } } } ``` ## Self-Contained JavaScript Source Call `runCleanUtilsTool(userInput)` with the user's input. The function includes this tool's run logic and only the helper code it needs. ```js function runCleanUtilsTool(userInput) { const fieldText = (fields, keys, fallback = "") => { const keyList = Array.isArray(keys) ? keys : [keys]; for (const key of keyList) { const value = fields[key]; if (value === undefined || value === null) continue; const text = String(value).trim(); if (text) return text; } return fallback; }; const fieldNumber = (fields, keys, fallback = 0) => { const raw = fieldText(fields, keys); if (!raw) return fallback; const parsed = Number(raw.replace(/[$,%\s]/g, "")); return Number.isFinite(parsed) ? parsed : fallback; }; const calculateRoasAcos = (input) => { const spend = fieldNumber(input, "spend", 0); const revenue = fieldNumber(input, "revenue", 0); const margin = fieldNumber(input, "margin", 0); const roas = spend ? revenue / spend : 0; const acos = revenue ? spend / revenue : 0; const breakEvenAcos = margin ? margin / 100 : 0; const issues = spend <= 0 || revenue <= 0 ? [{ severity: "error", message: "Spend and revenue must be greater than zero." }] : []; return { summary: `ROAS ${roas.toFixed(2)}x and ACOS ${(acos * 100).toFixed(1)}%.`, issues, output: [ `Spend: $${spend.toFixed(2)}`, `Revenue: $${revenue.toFixed(2)}`, `ROAS: ${roas.toFixed(2)}x`, `ACOS: ${(acos * 100).toFixed(1)}%`, margin ? `Break-even ACOS at ${margin}% margin: ${(breakEvenAcos * 100).toFixed(1)}%` : "" ].filter(Boolean).join("\n"), exportFilename: "roas-acos.txt", stats: { roas: roas.toFixed(2), acos: `${(acos * 100).toFixed(1)}%` } }; }; const __userInput = userInput == null ? {} : userInput; const __run = (fields) => calculateRoasAcos(fields); const __fields = __userInput && typeof __userInput === "object" && "fields" in __userInput && __userInput.fields && typeof __userInput.fields === "object" && !Array.isArray(__userInput.fields) ? __userInput.fields : (__userInput && typeof __userInput === "object" && !Array.isArray(__userInput) ? __userInput : {}); const __normalizedFields = Object.fromEntries(Object.entries(__fields).map(([key, value]) => [key, value == null ? "" : (["string", "number", "boolean"].includes(typeof value) ? value : String(value))])); return __run(__normalizedFields); } ``` ## Checks - Spend and revenue: Both values must be greater than zero for a meaningful ROAS and ACOS result. - ROAS calculation: Revenue divided by ad spend is shown as an x multiple. - ACOS calculation: Ad spend divided by revenue is shown as a percentage. - Margin reference: Optional gross margin is converted into a break-even ACOS reference. - Arithmetic-only scope: The tool does not import ad-platform data or account for refunds, fees, or attribution windows. ## Related Tools - [Break-Even Calculator for Product Pricing](/business-tools/break-even-calculator-product-pricing/): Calculate break-even units and revenue from fixed costs, unit cost, price, and target profit. - [Gross Margin and Markup Converter](/business-tools/gross-margin-markup-converter/): Convert cost and price into gross profit, margin, markup, or reverse-calculated selling price.