A 500-word essay is approximately one page single-spaced, or two pages double-spaced. This approximation assumes a common, 12-point font with 1-inch margins on standard printing paper.
The three most important structural factors in determining the word count per page are the font, font size and margins. The letters of different fonts have different widths, as well as different widths of space between letters, punctuations and words. The size of each font is typically adjustable within a wide range. The measurements of the margins determine how far within the physical borders of the page that type may appears. Additionally, the total number of words per page is affected by genres and styles of writing, some of which require repeated use of polysyllabic, technical vocabularies.