Why word counts turn into page counts
Assignment instructions and submission guidelines rarely agree on units. A professor asks for "five pages." A literary magazine caps short-story submissions at "7,500 words." Converting between the two only works if you also know the formatting, since font, size, and line spacing all change how many words fit on a physical page.
That is why "how many pages is 1,000 words" does not have one universal answer: it depends on what the page looks like.
The standard baseline: 250 or 500 words a page
The number most style guides and writing centers land on is 250 words per double-spaced page at 12-point Times New Roman with one-inch margins, and 500 words per page at the same font and size single-spaced. The 250-to-300-word range comes from William Shunn's "Proper Manuscript Format," the formatting standard most fiction markets still point submitters to, and it lines up with the 12-point, double-spaced layout that MLA and most academic style guides specify for essays.
Shunn himself has cautioned against treating that figure as precise: it dates from the era of monospaced typewriters, and a proportional font like Times New Roman does not fill a page as predictably. His advice for a finished manuscript is to trust your word processor's exact word count rather than any page-based estimate. This calculator is for the opposite, earlier situation: sizing a draft before it is written, when an exact count is not yet possible. Treat its output the same way: a planning number, not a replacement for the word processor's count once the document exists.
Font and line spacing change the math
Times New Roman at 12pt is the reference point because it's what the 250/500 figures were built around, but Arial and Calibri are common substitutes, and neither packs words onto a page the same way. Arial 12pt runs slightly wider than Times New Roman, so it fits fewer words per line: a range commonly cited across font-comparison guides puts it around 450 to 500 words per single-spaced page, roughly 470 as a working middle figure. Calibri at its default 11pt is narrower and smaller, so it fits more, with guides putting single-spaced Calibri in the 550 to 600 range, around 575 in the middle. Neither is a fixed standard the way Times New Roman 12pt is, so treat them as estimates rather than exact counts.
Line spacing scales in the opposite direction, in a simple and predictable way: doubling the spacing between lines roughly halves how many lines (and words) fit on a page. That is exactly the relationship between 500 words single-spaced and 250 words double-spaced at the same font, so this calculator derives 1.15-line and 1.5-line spacing by dividing the single-spaced baseline by the spacing multiplier, rather than treating them as separately measured numbers.
Worked example
A 1,000-word essay in 12pt Times New Roman comes out to roughly 2 pages single-spaced (1,000 ÷ 500) or 4 pages double-spaced (1,000 ÷ 250). Switch to Calibri 11pt double-spaced and the same 1,000 words compresses to about 3.5 pages (1,000 ÷ 287.5), because Calibri's smaller, narrower default fits more text per line than Times New Roman 12pt.
When exact counts matter more than estimates
These figures assume plain paragraphs with no headings, block quotes, bullet lists, images, or wide chapter breaks. All of those eat page space without adding as many words, so a works-cited page, a title page, or a heavily subheaded report runs shorter on words per page than a plain-text essay.
For a final submission where the page count is graded or contractually specified, format the document in your own word processor and check its page counter rather than relying on any estimate, this one included.