Why Tables Break in EPUB Conversion
Tables are one of the trickiest elements to handle when converting Word documents to EPUB. Unlike print PDFs, which have a fixed page size, EPUB files are reflowable—readers can change font size, text color, and line spacing on the fly. Tables designed for a fixed 8.5×11 inch page don't translate well to a 6-inch smartphone screen.
When you upload a Word document with complex tables to an EPUB converter, several problems commonly occur:
- Columns collapse or disappear on smaller screens
- Cell content overflows or gets cut off
- Merged cells cause alignment issues
- Nested tables create structural chaos
- Decorative borders and shading don't render consistently
The good news: with the right preparation in Word, you can build tables that survive EPUB conversion and remain readable across all devices. This guide walks you through the process.
Step 1: Keep Tables Simple and Narrow
The golden rule for EPUB tables is simplicity. A table that looks perfect in a Word document at 100% zoom may become unusable when reflowed on a phone screen.
Best practice: Limit your tables to 3–4 columns maximum. If you need to display more data, consider breaking it into multiple smaller tables or restructuring the content as a list.
For example, instead of a 6-column product comparison table, create two 3-column tables side by side in Word, or present the data as separate single-column tables for each product.
Also avoid very wide cells. If a cell contains more than 30–40 words, the text will wrap awkwardly on narrow screens. Break long content into bullet points or shorter sentences.
Example: Before and After
Before (problematic):
A 7-column table comparing 12 ebook formats with 200+ characters per cell. On a phone, this becomes unreadable.
After (EPUB-friendly):
Two separate 4-column tables, each covering 6 formats. Text is concise (under 50 chars per cell). Readers can pinch-zoom if needed, but the table remains functional at default zoom.
Step 2: Avoid Merged Cells and Nested Tables
Merged cells—where you combine two or more cells into one—are a red flag for EPUB conversion. EPUB readers have difficulty interpreting merged cell spans, and the result is often misaligned or broken layout.
Instead:
- Use a header row with separate columns rather than merging cells across the top
- If you need a subheading, place it in a separate row with a distinct style (bold, different background color)
- Never nest tables (a table inside a table cell). EPUB readers rarely support this, and it creates bloated, hard-to-parse markup
If your data truly requires complex nesting or merging, consider converting that section to a bulleted list or description list instead. It's often clearer for readers anyway.
Step 3: Use Consistent Formatting and Styles
Word offers table design templates and automatic styles. Use them—but keep them minimal.
What to do:
- Apply a simple table style (e.g., "Table Grid" or "Light Grid Accent 1") from Word's built-in templates
- Use a single, readable font (e.g., Calibri, Arial, or Times New Roman) for all table text
- Keep font size consistent—no smaller than 10pt, or it becomes hard to read on mobile
- Use light background colors if needed, but avoid dark backgrounds or heavy shading
- Apply bold to headers, not color-only formatting
What to avoid:
- Alternating row colors (some EPUB readers strip this out)
- Colored text as the only way to distinguish data (use bold or italics instead)
- Very thick borders or decorative lines
- Images or graphics inside table cells
Step 4: Set Column Widths Appropriately
In Word, you can set table column widths manually. For EPUB, avoid setting fixed widths in inches or points. Instead, let columns size themselves based on content.
How to do it:
- Right-click the table and select "Table Properties"
- Go to the "Table" tab and click "AutoFit"
- Choose "AutoFit Window" to let columns adjust to available space
- Alternatively, select each column and choose "Distribute Columns Evenly" to balance width
This ensures that when your Word document converts to EPUB, the table will reflow gracefully on any screen size. The EPUB reader will handle column resizing based on available width.
Step 5: Format Headers Clearly
Table headers are critical for accessibility and readability in EPUB. Make sure they stand out.
Best practices:
- Use the first row as a header row—Word has a "Header Row" option in table design
- Apply bold formatting to header text
- Use a slightly darker background color (light gray, not dark) if you want visual distinction
- Repeat the header row if your table spans multiple pages in Word (this helps in print, and some EPUB readers honor it)
Avoid using only color to distinguish headers. Some readers use grayscale, and color-blind readers may miss the distinction.
Step 6: Test with Sample Data
Before finalizing your manuscript, create a test table with realistic content and convert it to EPUB using a free converter or ebookconvert.pro to see how it renders.
Download the EPUB and open it in multiple readers:
- Calibre (free, desktop)
- Apple Books (iOS, macOS)
- Google Play Books (Android, web)
- Kindle Previewer (if targeting Kindle)
Pay attention to:
- Do all columns display without cutting off?
- Is text readable at the default font size?
- Do rows align properly?
- Do borders render consistently?
If something looks wrong, adjust your Word table and reconvert. This iterative testing catches problems before you publish.
Special Case: Data Tables vs. Layout Tables
There's a distinction worth understanding:
Data tables present structured information (e.g., a price list, comparison chart, schedule). These should use proper table markup and follow the guidelines above.
Layout tables were historically used in HTML to position elements side-by-side. In EPUB, layout tables should be avoided entirely. If you're using a table in Word just to position text or images next to each other, use a two-column table instead—or better yet, use text frames or a bulleted list.
When you convert Word to EPUB, the converter should recognize data tables and preserve them. Layout tables may break or be stripped out entirely.
Common Table Issues and Fixes
Problem: Table is too wide for the screen.
Solution: Reduce the number of columns, shorten cell content, or split into multiple smaller tables.
Problem: Text in cells is too small to read.
Solution: Increase font size in Word to at least 10pt. Avoid using very narrow columns that force text to wrap awkwardly.
Problem: Borders don't appear in EPUB.
Solution: Use simple, consistent borders (1pt black lines). Avoid decorative or colored borders. Some EPUB readers simplify borders automatically.
Problem: Merged cells cause alignment issues.
Solution: Remove merged cells and restructure the table. Use header rows or separate tables instead.
Before You Convert: A Quick Checklist
Before uploading your Word manuscript to convert to EPUB, run through this checklist:
- ☐ All tables have 3–4 columns or fewer
- ☐ No merged cells or nested tables
- ☐ Font size is 10pt or larger
- ☐ Headers are bold and clearly distinguished
- ☐ Column widths are set to AutoFit or evenly distributed
- ☐ Cell content is concise (under 50 words per cell)
- ☐ Borders are simple and consistent
- ☐ I've tested at least one table in an EPUB reader
Ready to Convert Your Manuscript?
Once your tables are properly formatted in Word, you're ready to convert to EPUB. Services like ebookconvert.pro handle the technical conversion and automatically detect table structure, so your carefully formatted tables will translate cleanly into the final ebook file.
The key takeaway: tables in EPUB must be simple, readable, and flexible. By following these formatting guidelines in Word before conversion, you'll ensure your tables look professional and function smoothly across all ebook readers and devices.
Happy formatting—and good luck with your ebook!
Related visual assets
Tables aren’t the only visual elements that need care before conversion—photos, diagrams, and illustrations have their own formatting rules. See How to Format Images and Illustrations in Word for EPUB Conversion to keep both working smoothly in your finished EPUB.
