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Amazon book sales calculator

Turn an Amazon Best Sellers Rank into a rough number of print sales a month. You get an estimate, a likely range and a plain note on how sure it is. It’s for paperbacks and hardcovers on Amazon.com. 3 free checks, no signup, no email.

From the book’s Amazon page, under Product details. Use the overall Books rank, not a category rank.

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Estimated print sales
About 35 a month
Rank 100,000 on Amazon.com
Likely range
25 to 55 a month
How often
About 1 a day
How sure
Fair
Checked against measured rank changes on about 1,400 paperbacks.
Check a niche first

One rank is one book. Niche Research reads the top books in a niche and says whether it’s worth making one.

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ColorCraft makes the interior, the cover wrap and mockups.

Work out the royalty per copy

Free KDP royalty calculator, from KDP’s published rates.

Estimated sales by Best Sellers Rank

For a print book on Amazon.com that holds the rank for a few weeks.

Estimated Amazon.com print sales at each Best Sellers Rank
RankEstimated salesLikely rangeHow oftenHow sure
100About 7,000 a month5,000 to 9,500 a monthAbout 233 a dayRough
500About 2,200 a month1,450 to 3,500 a monthAbout 73 a dayRough
1,000About 1,350 a month850 to 2,200 a monthAbout 45 a dayRough
2,000About 800 a month500 to 1,300 a monthAbout 27 a dayRough
5,000About 420 a month260 to 660 a monthAbout 14 a dayRough
10,000About 250 a month160 to 370 a monthAbout 8 a dayRough
25,000About 120 a month70 to 180 a monthAbout 4 a dayRough
50,000About 65 a month40 to 90 a monthAbout 2 a dayFair
100,000About 35 a month25 to 55 a monthAbout 1 a dayFair
250,000About 20 a month12 to 28 a monthAbout 5 a weekFair
500,000About 10 a month5 to 14 a monthAbout 2 a weekFair
1,000,000About 4 a month2 to 5 a monthAbout 1 a weekFair
2,000,000About 1 a month7 to 18 a yearAbout one every 4 weeksTested
5,000,000About 1 a yearUp to 2 a yearRoughly once a yearTested
10,000,000Less than 1 a yearUp to 1 a yearUsually years between salesTested

How to get a useful number

  • Use the overall rank in Books from the Product details section, not a category rank.
  • Note the rank on a few different days over a few weeks, and enter the average.
  • Be careful with a single reading between about 200,000 and 1,000,000. One sale can put a slow book there for a few days.
  • Allow for the season. A Christmas book’s rank in December says little about the rest of the year.
  • Check several books in a niche. One book’s rank tells you about that book, not about the niche.

How we worked these out

Amazon doesn’t publish sales by rank, so every calculator is an estimate. We used three kinds of evidence, each where it’s strongest:

  • Public calculators, for ranks better than 50,000. They fall into two groups that differ by about 2.5 times near rank 1,000. We found no free data that settles it, so we use the midpoint and show the range across both.
  • Measured rank changes, from 50,000 to 1,500,000. A book’s rank jumps when it sells. We counted those jumps across about 1,400 US paperbacks using Keepa data. Below about one sale a day, a jump is close to one sale.
  • Real sales reports, from 1,500,000 down. We compared a year of KDP sales reports for a small set of paperbacks with their rank history.

These are estimates for one kind of book in one store, checked in November 2026. They’re a guide, not a promise of sales.

To judge a whole niche rather than one book, ColorCraft’s Niche Research reads the top books and gives a verdict on demand and competition.

Book sales calculator FAQ

Sources

Read in November 2026. Also see the KDP royalty calculator and the KDP printing cost calculator.