Conversion rate is the share of ad clicks that become orders. It decides what a click is worth to you, how long to wait before judging a keyword, and how high you can bid. Here is what it looks like across 254,473 clicks on a real catalogue of KDP books.
The formula
orders ÷ clicks × 100
50 orders from 400 clicks is a 12.5% conversion rate.
Two details matter for books. Orders are credited to a click for 14 days, so the last few days always look worse than they will be. And Kindle Unlimited page reads are not orders: a KU book can convert better than its order count suggests.
What it looked like across a real catalogue
One publisher’s US account, April 2025 to September 2026: 254,473 clicks, 32,569 orders, 12.8% overall. By how the ad was matched:
| Targeting | Click-through rate | Conversion | ACOS |
|---|---|---|---|
| Exact match | 0.88% | 13.0% | 57% |
| Phrase match | 1.19% | 16.0% | 48% |
| Broad match | 1.21% | 12.4% | 55% |
| Product targeting | 0.90% | 12.1% | 45% |
And by where the ad appeared:
| Placement | Click-through rate | Conversion | ACOS |
|---|---|---|---|
| Top of search | 4.51% | 14.0% | 52% |
| Rest of search and other | 1.50% | 16.2% | 45% |
| Product pages | 0.45% | 5.0% | 95% |
The gap that matters is between search and product pages. Someone who typed a search is looking for a book like yours; someone browsing another book’s page mostly isn’t. Exact-match keywords made from searches that had already sold did better still — 17.7% across 43,904 clicks in our study of 2,846 keywords.
What is a good conversion rate?
One that makes your bids affordable. Many guides, including our own calculators, use 5% as a placeholder until you have data. On search placements in this account, books converted at roughly three times that; on product pages, at about 5%. Measure your own over at least a hundred clicks per book and use that.
How conversion sets your bid
royalty per sale × conversion rate
A $4.50 royalty at 15% conversion is worth $0.68 a click at break-even. At 5% it is worth $0.23.
The same book can afford three times the bid on a search that converts at 15% as on a product page that converts at 5%. That is why placement adjustments exist. Free toolAmazon PPC bid calculatorA starting bid from your price, royalty and conversion rate.
Clicks but no sales?
- Not enough clicks yet. At 10% conversion, 10 clicks with no sale happens by luck a third of the time. When to pause.
- The wrong placement. Check whether the clicks come from product pages.
- The wrong readers. Look at the search terms behind a broad keyword: one word can pull in the wrong audience. Add it as a negative phrase.
- The book page. Thumbnail, title, price, reviews and the first lines of the description all decide what happens after the click.
Common questions
What is a good conversion rate for Amazon ads for books?
In one publisher’s account of 254,473 clicks, book ads converted at 12.8% overall: 14–16% from search results and 5% from product pages. Use your own figure once a book has about a hundred clicks.
How is conversion rate calculated in Amazon Ads?
Orders divided by clicks, times 100. For books, orders are credited for 14 days after the click, and Kindle Unlimited page reads are not counted as orders.
What is a good click-through rate for Amazon book ads?
It depends heavily on placement. In the same account, top-of-search ads were clicked 4.5% of the time, other search placements 1.5% and product-page ads 0.45%.
Why does my Amazon ad have clicks but no sales?
Usually too few clicks to judge, clicks from product pages, searches from the wrong readers, or a book page that doesn’t convert. Check the placement and search term reports.
- Conversion rate = orders ÷ clicks × 100; for books, orders keep arriving for 14 days.
- Across 254,473 book-ad clicks: 12.8% overall, 14–16% from search, 5% from product pages.
- Exact keywords made from searches that had sold converted at 17.7%.
- Break-even bid = royalty × conversion rate, so placements that convert better can carry higher bids.
- Use your own rate once a book has about a hundred clicks.