AMS Ad Budgeter
Calculate your maximum profitable bid based on your book's conversion data and royalty targets.
Your net profit per sale (e.g., $2.00 for a $2.99 eBook).
How many clicks lead to a sale? (Average is 5-10%).
70% = Profitable, 100% = Break-even, 110%+ = Aggressive Launch.
How to Optimize Your Bid
- Extract Data: Open your Amazon Advertising console and pull your "Conversion Rate" (Orders divided by Clicks) for your top-performing targets.
- Input Royalty: Enter what you make per sale (e.g., $2.00). This tool will calculate the exact point where you stop making money.
- Set Your Goal: If you want to make a profit, set a Target ACoS of 70% or lower. For aggressive launches where you just want rank, set it to 100%.
Frequently Asked Questions
What is a "Good" Conversion Rate?
The industry average for fiction is 5–10%. If your rate is below 3%, your cover or blurb likely needs optimization before you increase your ad spend.
Should I always bid the "Suggested Bid"?
Rarely. Amazon's suggested bid is designed to win the auction, not to ensure your profit. Use this calculator to set a "Logic-Based Bid" instead.
What if my ACoS is over 100%?
This means you are spending more on ads than you make in royalties. Unless you are focused on "read-through" profit from a full series, you should lower your bid to the calculated recommendation.