Calculate your profitable CPC, analyze your ACOS, and plan your Amazon Advertising budget for KDP books. Find the maximum bid you can afford while staying profitable.
Three steps to optimize your Amazon Ads spend
Set your book price, royalty rate, and printing cost to calculate your profit per sale.
Choose your target ACOS and estimated conversion rate to find your maximum profitable CPC.
Use the budget planner to estimate daily and monthly results at your chosen CPC.
Switch between calculators — values carry over automatically
Typical Amazon Ads metrics for KDP books
| Metric | Low | Average | Good | Excellent |
|---|---|---|---|---|
| Conversion Rate | 1–3% | 5–10% | 10–20% | 20%+ |
| ACOS | 70%+ (bad) | 30–50% | 15–30% | <15% |
| CPC | $0.10 | $0.30–$0.50 | $0.50–$1.00 | varies |
| CTR (Click-Through Rate) | <0.1% | 0.2–0.4% | 0.4–0.8% | >1% |
Everything you need to run profitable Amazon Ads
Enter your book price and royalty rate, then adjust ACOS and conversion targets. Instantly see the maximum CPC you can bid while staying profitable.
Paste your campaign data to see your real ACOS, ROAS, cost per sale, and net profit or loss. Know instantly if your campaigns are making or losing money.
Set a daily budget and see projected clicks, sales, and monthly profit. Find your break-even budget so you never overspend on ads.
A color-coded gauge shows you exactly where you stand: green for profit, yellow for break-even, and red for loss. No guesswork.
Running Amazon Ads for your KDP books can be incredibly profitable — or an expensive mistake. The difference comes down to understanding your numbers. This free calculator helps you work backwards from your royalty to find the maximum Cost Per Click (CPC) you can afford while staying profitable.
The methodology is simple: calculate your royalty per sale, determine your break-even ACOS (Advertising Cost of Sale), then factor in your expected conversion rate to find your maximum bid. If you bid higher than your max CPC, you lose money on every sale. If you bid lower, every sale generates profit.
Most KDP authors waste money on Amazon Ads because they set bids based on guesswork rather than data. The Profitable CPC Calculator eliminates the guesswork. The ACOS Analyzer lets you evaluate your existing campaigns to see if they're actually profitable. And the Budget Planner projects your daily and monthly results so you can scale with confidence.
Coloring pages, mazes, crosswords, word searches, activity books — everything you need in one place.
See All Tools