Last reviewed by Robert Prime, 28 October 2026.
Quick Answer: A Kindle ebook is reflowable: the reader chooses the font and size, so there are no fixed pages, page numbers or headers. Format it with heading styles for chapter titles, a linked table of contents, simple paragraph styles and images sized for screens. KDP accepts Word (DOC/DOCX), EPUB or a KPF file from Kindle Create, and recommends checking the result in Kindle Previewer before you publish. On Amazon.co.uk, prices from £1.77 to £12.99 can earn the 70% royalty. Checked on Amazon’s pages, 28 October 2026.
Formatting the paperback as well? Print needs a different file: see how to format a book for KDP.
Would you rather someone else did it? Our book formatting services UK start at £69, VAT included, with files back in 24 hours.
Table of Contents
- Introduction
- How a Kindle ebook differs from a print book
- Step-by-Step Guide to Formatting Your Kindle eBook
- Pricing a Kindle ebook in pounds
- Kindle formatting mistakes
- Kindle formatting tools
- What it costs
- Frequently Asked Questions
Introduction
If you’re a UK author looking to self-publish on Amazon Kindle, understanding how to format an eBook for Kindle is critical. It’s not just about converting your manuscript into a digital format — it’s about optimising your book so it reads well, looks professional, and avoids the dreaded formatting errors that can derail your launch.
Having spent 25 years in eCommerce and self-publishing my own best-seller, Google. Panic. Repeat., I’ve lived through the frustration of Amazon’s archaic formatting requirements. When I was formatting Google. Panic. Repeat., I hired a formatter for £130 who delivered a shoddy file riddled with errors. Then I tried Fiverr—equally disappointing. The automated tools available at the time were just as bad. It took me hours—hours I would rather have spent writing or marketing—to get a KDP-ready file.
This guide is a no-nonsense, UK-centric manual that covers everything you need to know about formatting your Kindle eBook. It combines technical guidance, UK-specific business considerations, and practical advice to get you from manuscript to live book without the headache.
How a Kindle ebook differs from a print book
Formatting an eBook for Kindle differs from traditional print formatting. KDP no longer accepts the old MOBI upload format and now takes EPUB, which is reflowable; Amazon then converts your EPUB to its own Kindle format for delivery to devices. This means the text adjusts to the screen size and user preferences — unlike fixed-layout print pages.
Key Terminology
- Reflowable Text: Text that adapts to different screen sizes, font choices, and orientations, unlike fixed print layouts.
- EPUB: The open standard file format for eBooks, now fully supported by Amazon Kindle (replacing MOBI).
- Kindle Previewer: Amazon’s official tool to preview how your eBook will appear on various devices.
- KDP (Kindle Direct Publishing): Amazon’s self-publishing platform for authors.
- Table of Contents (TOC): A navigable list of chapters or sections within your eBook, essential for usability and Amazon’s requirements.
- Metadata: Information about your book such as title, author, publisher, and keywords.
- HTML and CSS: Underlying code languages that control formatting in EPUB files.
Why Proper Formatting Matters
Amazon’s KDP platform has strict formatting rules. Errors like missing TOCs, improper indents, or incompatible fonts lead to rejection or poor reader experience. Unlike print, where margins and page numbers matter, Kindle formatting focuses on clean, adaptable structure and navigability.
Step-by-Step Guide to Formatting Your Kindle eBook
This section provides a practical workflow for UK authors using commonly available tools like Microsoft Word, Calibre, or professional services. I’ll include exact menu paths and tips to avoid wasted hours.
1. Prepare Your Manuscript in Microsoft Word
Most authors start with a Word DOCX file. It’s essential your manuscript is clean and structured before conversion.
Use Styles for Headings:
Open your manuscript in Word. Highlight your chapter titles and apply Heading 1 style by going to the Home tab and clicking Heading 1 in the Styles section. For subheadings or sections, use Heading 2 or Heading 3 accordingly. This approach is crucial because Kindle uses these styles to generate the Table of Contents (TOC).Paragraph Formatting:
For fiction, use standard paragraph indents (usually 0.5 cm) without extra space between paragraphs. Navigate to Layout > Paragraph > Indents and Spacing and set your indent under Special to First line at 0.5 cm. For non-fiction, block paragraphs with spacing (e.g., 6pt after each paragraph) are acceptable.Remove Manual Formatting:
Avoid tabs, manual line breaks (Shift+Enter), or multiple spaces to align text. Instead, use Word’s formatting tools. To clear manual formatting, select the text and click Home > Clear All Formatting (the eraser icon).Page Breaks:
Insert page breaks at the end of chapters by going to Insert > Page Break. This ensures chapters start cleanly and prevents odd breaks on Kindle devices.Images:
Insert images in JPEG or PNG format, sized appropriately by pixel dimensions (DPI is a print concept and doesn’t affect on-screen Kindle rendering). Amazon recommends images be at least 1000 pixels wide but no wider than 2560 pixels, balancing quality and file size. To insert, go to Insert > Pictures > This Device, then select your image. Once inserted, right-click the image, select Size and Position, and ensure Lock aspect ratio is checked while resizing.
2. Create the Table of Contents (TOC)
- Navigate to References > Table of Contents > Custom Table of Contents.
- Choose a style that suits your book (I recommend ‘Classic’ or ‘Formal’ for Kindle).
- Ensure Show levels is set to at least 2 or 3 to capture subheadings.
- After inserting the TOC, click on it, then select Update Field > Update entire table to refresh the TOC (entries generated from heading styles are already clickable hyperlinks).
- Save your document.
3. Convert Word to EPUB
Amazon now accepts EPUB format directly, which is preferable to the older MOBI.
- Download and install Calibre (free, open-source): https://calibre-ebook.com.
- Open Calibre and click Add books. Select your DOCX manuscript.
- Select the book in your library, then click Convert books.
- In the conversion window, set Output format to EPUB.
- Under Structure Detection, ensure Chapter mark is set to detect your heading styles (e.g.,
//h1). - Under Table of Contents, enable Generate a Table of Contents based on your headings.
- Click OK to convert.
- Once converted, use Calibre’s Check book plugin (install if necessary) to validate your EPUB and catch errors.
4. Validate and Preview Your EPUB with Kindle Previewer
- Download and install Amazon’s Kindle Previewer from the official KDP website: https://kdp.amazon.com/en_US/help/topic/G202131170.
- Open your EPUB file in Kindle Previewer to see how it renders on Kindle devices (Kindle Paperwhite, Fire tablet, mobile apps).
- Navigate through your book, checking for:
- Functional clickable TOC links
- Image positioning and clarity
- Paragraph spacing and indents
- Font consistency
- Fix any issues in your source Word file or EPUB and repeat the process until perfect.
5. Upload to KDP
- Log in to your KDP dashboard: https://kdp.amazon.com.
- Click Create a New Title > Kindle eBook.
- Fill in your book details, including title, author, description, and keywords (with UK English spelling).
- Upload your EPUB file under the Manuscript section.
- Upload your cover image: JPEG or TIFF, ideally 2,560 pixels high by 1,600 wide, and at least 1,000 high by 625 wide (KDP eBook cover requirements).
- Amazon will run its own validation and flag errors. Resolve any issues promptly and re-upload.
- Set your pricing (consider UK VAT, see pricing a Kindle ebook in pounds).
- Publish when ready.
Pricing a Kindle ebook in pounds
Formatting affects what you earn, because file size sets your minimum price and your delivery cost. From Amazon’s eBook list price requirements for Amazon.co.uk, read 28 October 2026:
- 70% royalty: list prices from £1.77 to £12.99.
- 35% royalty: the lowest price allowed is £0.77 for a file under 3 MB, £1.25 from 3 MB and £1.49 from 10 MB, up to £150.
On the 70% option Amazon deducts a delivery cost, which it says varies “by file size” (KDP eBook royalties). So compress images before you upload: a lighter file costs less to deliver and keeps the lowest price open to you.
VAT. Ebooks have been zero-rated in the UK since 1 May 2020. Amazon adds any VAT on top of your list price and pays your royalty on the price without VAT. Details: VAT on books for UK self-publishers.
Spelling and metadata. Use the same spelling (UK or US) in the book, the description and your keywords, so Amazon.co.uk shoppers searching in British English find you.
Kindle formatting mistakes
Many UK authors fall into avoidable traps that cause delays, rejections, or poor reader experience on Kindle.
Mistake 1: Ignoring the Table of Contents
A missing or unclickable TOC is the most frequent Kindle publishing error. Without it, readers can’t navigate, and Amazon may reject your file. Always use heading styles and test the TOC in Kindle Previewer.
Mistake 2: Using Incompatible Fonts
Kindle devices support a limited font set. Avoid custom fonts or those not embedded properly. Stick to standard fonts like Georgia, Arial, or Times New Roman. Avoid overused self-pub fonts like Papyrus or Bleeding Cowboys that scream amateur.
Mistake 3: Poor Image Handling
Uploading low-resolution images or ignoring recommended dimensions leads to blurry or distorted images. Resize images to avoid unnecessarily large file sizes which slow downloads and increase delivery costs.
Mistake 4: Overcomplicated Formatting
Avoid fancy indents, tabs, or line breaks. Kindle’s reflowable text demands simple, clean structure. Complex tables or layouts often break or display erratically.
Mistake 5: Skipping Preview and Validation
I learned this the hard way. When I wrote Google. Panic. Repeat., I uploaded files without thorough testing. Amazon’s rejection emails are frustratingly vague. Use Kindle Previewer religiously and validate your EPUB before upload to save time and headaches.
Kindle formatting tools
Here’s a curated list of tools that fit UK authors’ needs for formatting Kindle eBooks.
Microsoft Word
Most authors already have access. Use Word’s styles and formatting tools meticulously. Export to DOCX for conversion.
Exact path for styles:
- Select text > Home tab > Styles group > Choose Heading 1, Heading 2, etc.
Calibre
Free, open-source eBook management and conversion software. Converts DOCX to EPUB and MOBI. Beware of default settings that sometimes break TOCs—always customise conversion options.
Kindle Previewer
Amazon’s official free desktop app to preview your eBook on multiple Kindle devices and apps. Essential for final checks.
Sigil
A free EPUB editor that allows fine-tuning of EPUB files. Useful for advanced users who want to edit HTML/CSS directly.
Professional Formatting Services
For UK authors who want to avoid the pitfalls and save time, services like publishing.co.uk offer automated, high-quality Kindle formatting tailored to UK market standards and requirements. Unlike cowboy freelancers or confusing DIY tools, publishing.co.uk provides a reliable, affordable way to get your book KDP-ready without the usual headaches.
What it costs
Publishing on KDP is free. What costs money is the help you buy: editing, a cover, formatting, ISBNs, proof copies. Every part is priced, with sources and dates, in how much it costs to self-publish a book in the UK, which also has a calculator for your own book.
Frequently Asked Questions
What is the most common mistake UK authors make with how to format an eBook for Kindle?
The most frequent error is a missing or unclickable Table of Contents. This frustrates readers and often causes Amazon to reject the file. Always use heading styles and test your TOC in Kindle Previewer.
How much does formatting an eBook for Kindle cost in the UK?
DIY formatting can be free but often wastes time. Professional formatting services start around £69 — ours is £69 for a paperback and £119 with the Kindle file. Adding Nielsen ISBNs (£93 single or £174 for 10) and cover design (£300–£600) are additional but important investments.
What tools do UK authors recommend for formatting Kindle eBooks?
Microsoft Word for manuscript preparation, Calibre for conversion, Kindle Previewer for validation, and professional services like publishing.co.uk for hassle-free formatting. Advanced users might use Sigil for EPUB editing.
How long does the formatting process typically take?
DIY formatting can take days or weeks depending on technical skill. Professional services usually deliver within 2–5 working days. Testing and revisions add additional time.
Can I handle formatting myself or should I hire a professional?
If you’re comfortable with Word, EPUB, and Kindle Previewer, you can DIY. However, many UK authors find professional formatting a worthwhile investment to avoid costly errors and delays.
What are the UK-specific requirements when formatting an eBook for Kindle?
UK authors should use British English spelling in metadata, buy ISBNs from Nielsen if they want their own imprint on a print book, and optimise keywords for Amazon.co.uk’s market.
How do VAT and royalties affect my eBook pricing on Amazon UK?
Since May 2020, eBooks are zero-rated for VAT in the UK, so no VAT is deducted from your listed price before royalties are calculated. Pricing your eBook inside KDP’s 70% royalty band maximises your royalty rate (the band changed in July 2026 — check KDP for current Amazon.co.uk thresholds). Note that audiobooks still carry 20% VAT.
Can I use Amazon’s free ISBN for my eBook in the UK?
KDP’s free ISBNs are only for paperbacks and hardbacks, and a Kindle ebook doesn’t need an ISBN. If you sell the ebook in other shops, some may ask for one, and you can buy your own from Nielsen.
