Amazon Sales Rank

The Amazon Sales Rank (ASR) is a great way to view the current sales for a book.  The Amazon sales rank is a number that says how many other titles sold more than your titles. The smaller the Amazon Sales Rank number, the better the sales. The Amazon sales rank is normally re-computed daily.

As an example, a major publisher tracked 25 titles over a six month period, correlating the weekly Amazon sales rank with actual reported sales from Amazon. Here is what they found:

Amazon        Actual
Sale Rank     Books Sold
---------     -----------------
75-100         250-275/wk
100-200        225-249/wk
200-300        150-200/wk
450-750         75-100/wk
750-3,000        40-75/wk
3,000-9,000      15-20/wk
10,000+            1-5/wk
 

Here is a GREAT article on Amazon sales rank calculations:
 

http://www.fonerbooks.com/surfing.htm
 

According to this link:

• Ranks from 1 - 10,000 are recalculated every hour.
   
• Ranks from 10,001 - 110,000 are recalculated every day.
   
• Ranks from 110,001 - up are recalculated once a month.