Until recently, the best way to convert Word to ePub was to use the Calibre software. Now, there is another excellent option – using the Google Docs export feature.
Basically you can upload a PDF or Word document to Google Drive, convert it to Google Docs format and export it to ePub later.
All you need to do is to use the File – Download as – ePub publication, as you see in the image.
Have in mind that in order for the document to look nice, you need to make use of headings, subheadings, and other document formatting options. You can also create contents, links and other features.
If you are still not satisfied with how your document looks, you can use the Sigil tool for editing eBooks. Read our tutorial on it here.