title_body: Occasional blank pages in ePub produced by calibre from Word document
upvoted_answer: I don't use calibre to produce ebooks, but you should be looking at the css file. My guess is that p.block_7 has some code to force a page break.  You can probably fix the problem in two ways -- by removing the blank p tag  with the corresponding css or changing the css file itself. Here's code from my recent css file to see what live code looks like. 
  
    p.centeredpagebreak {
       text-align: center;
       font-size: 1.2em;
       page-break-before: always;
       }
  
  
  MORE about CSS 
  
  As you can guess there are also options to do page-break-after and to specify "never" instead of always. By the way, support for this css declaration is flaky; it varies on which reading system you're testing on. IIRC, Google Play Books doesn't support that.. Depending on the device and the context, sometimes Even Kindle doesn't always render it properly.
  
  Answer 2: Like I said, I don't use MS Word/Calibre to format ebooks. But my guess is that if you use the HEADING style for each chapter, you don't need to include a page break in the MS Word file; Calibre will just assume that for every section with a HEADING style, it should insert a page break. Try this suggestion first before trying to mess with the css.