Amazon PPC calculator

Amazon ACoS Calculator Free browser tool

Check Advertising Cost of Sales, ROAS, break-even ACoS, and profit after ads before changing bids or scaling PPC spend.

No signup Runs locally

Campaign inputs

How to use the ACoS result

ACoS is ad spend divided by ad-attributed sales. Lower ACoS is usually more efficient, but launch campaigns may intentionally run higher while ranking improves.

Break-even ACoS estimates the maximum ACoS before ad spend consumes the available unit profit. Use it as a guardrail, not as a guarantee.

Amazon PPC workflow

Use this number with profit, bids, and listing quality

One PPC metric rarely tells the full story. Pair this calculator with unit profit, conversion rate, price, reviews, and inventory position before increasing bids or cutting campaigns.

For cleaner tracking, keep the same date range across ad spend, ad sales, total sales, sessions, clicks, and orders. Mixing time windows can make the result look better or worse than the real campaign.

Quick checklist

  • Use the same reporting date range for every input.
  • Separate launch campaigns from mature campaigns.
  • Check profit before judging ACoS or TACoS alone.
  • Review conversion rate before scaling ad spend.

FAQ

What is ACoS?

ACoS means Advertising Cost of Sales. It is calculated as ad spend divided by ad-attributed sales, multiplied by 100.

What is break-even ACoS?

Break-even ACoS is the percentage of sales you can spend on ads before the unit becomes unprofitable based on your entered costs.

Does this use my Amazon account?

No. The calculator runs in your browser and does not connect to Seller Central or Amazon Ads.