Ad ROI Calculator: ROAS, CPM & Media Plan Builder

Ad ROI Calculator is a free Chrome extension that calculates 118+ advertising metrics — including ROI, ROAS, CPM, CPA and LTV — right in your browser sidebar. It also solves backwards: from the result you need to the budget required. Calculate ad profit, plan campaign budgets and compare ROI scenarios side-by-side in real time. A Chrome extension for performance marketers, media buyers, agency owners and business owners running Facebook Ads, Google Ads, TikTok Ads, YouTube Ads or any paid media. Whether you need a quick CPM estimate or a full media plan, this extension lets you build custom metric dashboards, solve SaaS and e-commerce unit economics, and test "what-if" scenarios for any business model. WHY A SIDEBAR BEATS A WEB CALCULATOR Online calculators lose your numbers the moment you switch tabs. This one stays pinned in your browser sidebar while you move between ad accounts, dashboards and spreadsheets — paste your numbers straight in, nothing resets. SOLVE IN ANY DIRECTION Spreadsheet templates only calculate forwards: you enter the budget, they give you the leads. This one works both ways. Enter the result you need — "50 deals at no more than $80 CPA" — and it tells you the traffic and budget required to get there. BUILT FOR REAL WORKFLOWS • E-commerce and retail: AOV, COGS, product margins and break-even points. • B2B and lead generation: cost per lead, deal value, pipeline efficiency. • SaaS and mobile apps: LTV, CAC, payback periods, subscriber retention. • Local business and services: local ad spend, booking rates, acquisition costs. KEY METRICS INCLUDED • 118+ metrics and 230+ formulas across PPC, lead gen, e-commerce, SaaS and omnichannel. • Traffic and cost: CPM, CPC, CPV, CPI, CTR, impressions, ad budget. • Conversion and leads: CPA, CPL, CPO, CVR, lead volume, sales count. • • Profit and return: ROI, ROMI, ROAS, break-even ROAS, POAS, MER, net profit, contribution margin, gross margin. • Unit economics: AOV, LTV, CAC, LTV:CAC ratio, payback period, total revenue. FEATURES • Dynamic funnel builder with presets for lead gen, e-commerce, SaaS, B2B and services. • Full-screen landscape view for wide, multi-campaign analysis. • Side-by-side scenario comparison: "conservative" vs "aggressive" budgets at a glance. • Formula inspector: see the logic behind every metric and learn the maths as you work. • One-click copy of your whole plan, ready to paste into Sheets or Excel (sidebar), or export to a CSV file (full dashboard view). • Save unlimited client plans on PRO and reload any of them in one click. OFFLINE AND PRIVATE No registration. Works offline. Every calculation happens locally in your browser — your client numbers never leave your device. No analytics, no tracking. The only network request is a PRO license check with Gumroad, which sends nothing but your license key. COMPATIBILITY Works in Google Chrome 114 and newer. FREQUENTLY ASKED QUESTIONS Is Ad ROI Calculator free? Yes. All metrics and calculations are free, and you can save one client plan at no cost. PRO adds side-by-side scenario comparison, one-click copy and CSV export of the whole plan, and unlimited saved plans. How do I calculate the ad budget for a target number of sales? Enter the goal — for example, 50 sales at a CPA of no more than $80. The extension solves backwards: the budget is up to $4,000 (50 × $80), and it also shows the traffic you need at your conversion rates. What is break-even ROAS? Break-even ROAS is the minimum ROAS at which ads stop losing money. It equals 1 divided by your margin: at a 40% margin it is 2.5, meaning $2.50 in revenue for every $1 of ad spend. The extension calculates it automatically. What is the difference between ROAS and POAS? ROAS compares ad spend with revenue; POAS compares it with gross profit. So POAS shows whether your ads really make money after product costs. The extension calculates both. Does it send my data anywhere? No. Your calculations and client numbers never leave your browser: no account, no tracking. The only network request is a PRO license check with Gumroad, which sends only your license key. The extension also works offline. Which browsers does it support? Google Chrome 114 and newer. The calculator lives in the browser side panel, which not every Chromium-based browser offers.