The number of words on a single-spaced, typed page depends on the font and point size used. For example, in 12-point Arial font, a single-spaced page contains an average of 470 words. Those same words in 13-point Times New Roman font take up 1.4 pages.
Font is a term used in typography to refer to a typeface of a specific weight, size and style. Traditionally, various fonts were printed by using their corresponding metal type on a printing press. With the advent of digital technology, many different fonts are available for use on computers, most commonly in word processing applications. Point size is also a typographic term and is typically abbreviated as "pt." It is the traditional unit of measuring type size on a printed page.