How long it probably runs, and whether that is a problem
The convention depends on where you are in your career, so that is the first thing this asks. The page estimate is an estimate, and the page says how wrong it can be.
How long it probably runs, and whether that is a problem
The convention depends entirely on where you are in your career, so the stage is the first thing this asks. The page estimate is an estimate, and the page says how wrong it can be.
How the estimate is made, and why it is a range
Two calculations that fail in opposite directions. Counting characters against a page's capacity under-counts a resume of many short lines, because short lines waste the width. Counting lines against a page's line count under-counts a dense one, because a long line wraps.
The range between them is reported rather than an average, because an average would look more precise than the underlying guess. When the two agree you get one number; when they disagree you get a span, and the span is telling you the layout matters.
It cannot see your file. Margins, point size, line spacing and columns all change the real answer and none of them are in pasted text. Open your own document to know for certain — this tells you whether it is worth opening.
The one-page rule is not a rule
It is a convention for people early in a career, and a sensible one: there genuinely is not two pages of material after three years, and padding is visible.
Applied to someone with fifteen years of experience it does real damage. Compressing a career into one page means cutting the evidence and keeping the job titles, which is the wrong half.
Density matters more than page count
Two pages that a reader gets through is better than one page they give up on. Long unbroken paragraphs are the first thing skipped; a page of one-line fragments reads as a keyword list.
Academic and government applications are different documents
An academic CV lists publications, grants and teaching in full and has no upper limit. A US federal application asks for detail a private-sector resume would cut. Neither is measured against the conventions above, which is why the stage selector includes them.