KDP BSR sales estimator
Paste any Amazon Books BSR and see the estimated daily, monthly, and yearly paperback sales. Use it to validate a coloring book niche before you publish.
Use the overall Books BSR shown on the product page, not a subcategory rank.
Daily sales
1.0
copies per day
Monthly sales
30
copies in 30 days
Yearly sales
365
copies in 365 days
Estimates based on log-log interpolation between industry benchmark anchor points for paperback Books BSR on Amazon US. Actual sales vary with category, seasonality, reviews, and ad spend. Treat these numbers as directional, not exact.
How to use this tool
Open any coloring book on Amazon and scroll to the "Product details" section. Copy the number next to "Best Sellers Rank" at the top (the overall Books rank, not a subcategory rank), then paste it into the BSR field above. To validate a niche, check the BSR of the top 10 results for your target keyword. If fewer than 3 books sit below BSR 200,000, the niche has low buyer volume regardless of how many competitors exist.
How BSR estimates work
Amazon does not publish a formula for BSR. This calculator uses a log-log interpolation between industry-cited anchor points collected from authors who share their actual sales data. The curve is most accurate between BSR 100 and BSR 500,000 where volume is steady. Above BSR 500,000, sales happen in irregular bursts and daily averages become misleading. Use estimates to compare books, not to forecast exact revenue. For the full methodology, including the accuracy bands by BSR range and how to validate the estimate against your KDP reports, see the methodology guide.
Frequently asked questions
- What is Amazon BSR and where do I find it?
- BSR (Best Sellers Rank) is Amazon's relative sales ranking inside the Books category, shown in the listing's Product details section. Lower means more sales. Paste the overall Books rank (not a subcategory rank) into this calculator.
- How accurate are BSR sales estimates?
- BSR-to-sales estimates are directional, not exact. Amazon does not publish a formula, so all public calculators use curves fitted to data from authors and publishers who share their actual sales numbers. The error margin widens significantly above BSR 500,000 where sales happen in irregular bursts rather than steady daily volume. Use estimates to compare books and validate niches, not to predict revenue to the dollar.
- What BSR should a new coloring book aim for?
- A new coloring book reaching BSR 100,000 or better within its first 90 days indicates strong product-market fit: that's roughly 15 sales per month or more. Top sellers in the coloring book category consistently hold BSR below 20,000. Books stuck above BSR 1,000,000 after 6 months usually need cover, keyword, or niche changes rather than more ads.
- How do I convert estimated sales into royalty revenue?
- Multiply estimated daily sales by your per-sale royalty from the KDP profit calculator. For a $9.99 coloring book on expanded distribution with 100 interior pages, the royalty is about $3.75 per sale. A BSR of 50,000 estimates 1 sale per day, or about $112 per month in royalty revenue before ad spend.
Use BSR to validate a niche you've already screened. To screen broad themes into 5 to 10 specific sub-niches first, run the niche finder. Convert estimated sales into royalty revenue with the KDP profit calculator, check whether your listing is actually indexed for the right search terms with the keyword optimizer, or pick the design count that fits your target price with the page count planner. For which subcategories actually move books, see the KDP coloring book categories guide. For what each BSR tier means and how to validate a niche from BSR data, see how to read BSR.
Numbers say yes? Publish into the niche. Start a free account and generate the interior at 300 DPI in your chosen style, formatted for upload to KDP.
Last updated: April 2026. Based on publicly shared paperback sales data across the Amazon US marketplace.