7 free tools
Free Resources
Tools we built for self-published authors — free to use, open to everyone, and no account required.
KDP Royalty Calculator
What a book actually pays you — ebook, paperback or hardcover — with the printing cost, the delivery fee and the price KDP will refuse. Every store at once.
Amazon's own published rates and printing costs, dated on the page.
Open the calculatorKobo royalty calculator
What Kobo pays for one sale — from Kobo's own published rate card, including the threshold that turns 70 % into 45 % and the two rates nobody writes about.
Kobo's own published rate card, read again every day.
Open the calculatorKindle Unlimited page rates
What Amazon has paid per page read, month by month and store by store, going back to 2015. Amazon publishes the fund; the rate has to be derived.
Derived from real KDP accounts: Amazon publishes the fund, never the rate.
See the ratesKENP calculator
What Kindle Unlimited pays for pages read — your book's page count, the store you sell in, and the rate Amazon actually settled rather than a number copied off a blog.
Uses the same rate history, and the last month Amazon has settled.
Open the calculatorBook sales calculator
What a Best Sellers Rank really implies in sales, for any Kindle or print store — as a range, because we joined real ranks to real KDP royalties and a single number would be false.
Built on real Amazon rank histories joined to the KDP royalty reports behind them.
Open the calculatorISBN Barcode Generator
The barcode for the back of a printed book, as a vector PDF or SVG — measured against KDP's own cover rules before you download it.
Measured against Amazon KDP's published cover rules before you download.
Open the generatorQR Code Generator
Design a code for the back matter of your book — colours, dot shapes, a logo, a caption — and check it still scans before it goes to print.
Every design is decoded back at phone-camera size before you download.
Open the generator
The product behind the tools
From one-off answers to your real net profit.
TrueRoyalties is the all-in-one dashboard for self-published authors and publishers: it combines your royalties from Amazon KDP, Kobo, Apple Books, Shopify and the other platforms you sell on with your Amazon Ads, Meta Ads and TikTok Ads spend, and computes the real net profit of every book.