How is this calculated?

Books a month × the share of them in Kindle Unlimited × what you'd pay per ebook, compared with the monthly fee. Books outside Kindle Unlimited cost the same whether you subscribe or not, so they are left out.

Does it count the free trial?

No. It compares a normal paid month. The trial makes the first month free if you have never tried Kindle Unlimited.

Why is my price different?

Amazon sets the price per country and changes it from time to time; offers and annual plans also vary. Type the price you see on your Amazon account and the result updates.

Is Kindle Unlimited worth it for you?

Three numbers about your reading, and the answer in your currency. Only the books that are in Kindle Unlimited count: the rest cost the same either way.

Made by Kindle Watchlist · Updated October 4, 2026

Your Amazon storeBooks you read a month4How many of them are in Kindle Unlimited60%Not sure? Look at your last 10 Kindle reads: the share with the Kindle Unlimited badge is your number.

What those books would cost to buyKindle Unlimited monthly price

Prices checked on October 4, 2026. Change it if yours differs.

Buying those books: $11.98
Kindle Unlimited: $11.99

It's a close call: about $0.01 a month either way.

It pays for itself at 4 books a month.

What the number can't tell you

You can borrow up to 20 titles at a time, and magazine issues count toward that limit.
When you cancel, borrowed books go back. You keep nothing.
Books join Kindle Unlimited through KDP Select, which requires the ebook to be exclusive to Amazon. That is why many big-publisher bestsellers are not in it.
If you have Prime, Prime Reading already includes a rotating selection of Kindle Unlimited titles. Try that first.
Your public library may lend ebooks for free.

Worth it if you binge long indie series and most of what you read carries the Kindle Unlimited badge. Not worth it if you mostly read new big-publisher releases, or a book or two a month.

Worth starting when you have a queue of Kindle Unlimited books ready. Set a reminder before day 30.

Start the 30-day free trial

Free for 30 days if you have never tried Kindle Unlimited. It then renews every month at the regular price unless you cancel, which you can do any time from your Amazon account. Affiliate link: we may earn a referral fee.

Reading series? Get an email the day the next book lands, in or out of Kindle Unlimited.

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Questions

How is this calculated?: Books a month × the share of them in Kindle Unlimited × what you'd pay per ebook, compared with the monthly fee. Books outside Kindle Unlimited cost the same whether you subscribe or not, so they are left out.
Does it count the free trial?: No. It compares a normal paid month. The trial makes the first month free if you have never tried Kindle Unlimited.
Why is my price different?: Amazon sets the price per country and changes it from time to time; offers and annual plans also vary. Type the price you see on your Amazon account and the result updates.