AdMath — PPC Break-Even & Bid Calculator

Your ad console shows your ACOS. It never shows the ACOS your margin can afford.

Most sellers watch the ACOS number and never learn the *ceiling* for that specific product. That ceiling is set by your costs: unit cost, fulfilment, referral fees, everything else. AdMath calculates it for you in seconds.

1 — Product & Margin

Sale price, cost, fulfilment fee, referral %, other cost → true unit cost, profit before ads, margin, and your break-even ACOS.

2 — Campaign Results

Spend, ad sales, organic sales, clicks, orders → ACOS, ROAS, TACOS, average CPC, conversion rate, cost per order, profit after ads and your maximum CPC. One verdict line tells you if the ads are funded by themselves or by your organic sales.

3 — Bid Planner

Paste term, clicks, orders, spend, sales rows. Every term gets a RAISE / KEEP / LOWER / PAUSE label, a suggested bid, and a total of the spend currently going nowhere. Export as CSV.

4 — Budget Planner

Daily budget + target ACOS → the orders per day you must hit, and whether that is realistic before you commit.

You get

- index.html — the complete app, one file, works offline

- README.md — quick start

- sample-bid-planner.csv — paste-ready example

- LICENSE.txt — single-user commercial licence

- icon.png

Why it is worth $12

- Ad consoles show ACOS. They do not show what *your* margin can afford.

- Spreadsheets fall apart across multiple product lines.

- No account. No ads. No tracking. Nothing leaves your device.

Currency-neutral and works for Amazon, Etsy, TikTok Shop, eBay and Shopify sellers.

Not financial advice — verify against your own account statements. Not an automated bidding bot.