How accurate is this BSR Sales Estimator?
Amazon does not publicly release the exact formula they use to calculate the Best Sellers Rank (BSR). However, by analyzing thousands of data points across both Kindle eBooks and Print books, we know that the relationship between rank and sales follows a logarithmic power law curve.
Instead of using a static, inaccurate linear regression, this calculator utilizes a Log-Log Interpolation Algorithm. It analyzes the exact curve between known algorithmic anchor points to provide a highly precise sales estimate for any rank you input, automatically adjusting for the format type.
Print Books vs. Kindle eBooks Ranking
Amazon maintains separate ranking algorithms for Print and Kindle stores. A BSR of 10,000 in the Kindle store typically translates to significantly more sales than a BSR of 10,000 in the Print store, due to the higher volume and velocity of digital downloads.
How do I calculate my KDP Royalties?
You can find your exact estimated royalty per book in your KDP Pricing Dashboard. Instead of guessing percentages and deducting printing costs manually, simply input your book's list price and your exact royalty dollar amount. Our tool will multiply this by the interpolated sales volume to project your monthly payout.