title_body: What is the native pixel resolution of the viewable area on a Kindle Paperwhite 2 when displaying a .pdf file?
upvoted_answer: To prevent the images from scaling you should set the width of the image in pixels rather than in, eg, 100%. It appears that the Kindle Paperwhite is 4.6 inches wide at 212 ppi (source), which comes to an unlikely 975.2 pixels wide&mdash;but it's a place to start. I would suggest setting image width (or width of containing div) to 970 px for starters. If it's distorted, then there is probably a hard-coded margin for the page of greater than 2 pixels, so reduce a small amount and try again.
  
  Note that specifying the pixel size will mean that on other Amazon devices, the image will not resize to fit the screen&mdash;iPad and iPhone Kindle app users may not be happy with the end result.