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Should I enroll this book in Kindle Unlimited?

A $4.99 ebook is on the 70% plan. The file is 2 MB and delivery is entered at $0.15/MB. You expect 80 paid ebook sales in 90 days, 12,000 Kindle Unlimited page reads at $0.0045, a $14.99 paperback of 280 black-and-white pages with 20 KDP sales, and — if you stay wide — 40 other-store ebook sales at $2.50 net plus 10 Ingram paperbacks at a 40% wholesale discount and $5 print. These are starting points, not live Amazon figures. Overwrite them on the calculator.

Exclusive keeps $405.12. Wide keeps $491.06. Wide is ahead by $85.94 on this window. One paid ebook sale nets $3.193, which at $0.0045/page is 709.6 KENP. Matching the $139.94 of wide extras would take 31,097.8 KENP, more than the 12,000 in the example.

Change the KENP rate, the KU reads, or the wide volume and the ranking can flip. Forty thousand KU reads on the same book leaves exclusive ahead. The page still does not tell you to enroll.

Common questions

Should I enroll this book in Kindle Unlimited?

On the worked example — $4.99 ebook on the 70% plan, 2 MB file, $0.15/MB delivery, 80 paid ebook sales, 12,000 KU page reads at $0.0045, $14.99 paperback with 280 black-and-white pages, 20 KDP paperback sales, 40 other-store ebook sales at $2.50 net, and 10 Ingram paperbacks at a 40% wholesale discount and $5 print — exclusive keeps $405.12 and wide keeps $491.06. Wide is ahead by $85.94. That is arithmetic on those starting numbers, not a recommendation to enroll or leave.

How many KU page reads equal one paid sale on this example?

One paid sale nets $3.193. At $0.0045 per KENP page that is 709.6 pages. A 250-page book that is read all the way through is not automatically 250 KENP; KENP is Amazon's own normalized count from the file you uploaded.

How many KU page reads would match the wide extras?

The wide extras on this example are $100 of other-store ebook net plus $39.94 of Ingram paperback net, $139.94. At $0.0045 per page that is 31,097.8 KENP. The starting 12,000 reads do not reach it. Type a different KENP rate or a different wide volume on the calculator and the target moves.