Single Spaced vs Double Spaced
How line spacing affects page count, when each format is required, and word-count-to-page estimates for essays, reports, and manuscripts.
TL;DR — Key Points
At a Glance
| Criterion | Single Spaced | Double Spaced |
|---|---|---|
| Line height (12pt font) | ~14.4pt (1× line height) | ~28.8pt (2× line height) |
| Words per page (12pt TNR) | 500–600 words | 250–300 words |
| Words per page (11pt) | 540–650 words | 270–325 words |
| Words per page (14pt) | 400–480 words | 200–240 words |
| Academic use | Rarely — avoid unless specified | Required: APA, MLA, Chicago |
| Business / professional | Standard for reports and emails | Unusual — wastes paper |
| Manuscript submissions | Not accepted | Industry standard (Shunn format) |
| Annotation space | Tight — difficult to mark up | Generous — room for comments |
| Page economy | Efficient — half the pages | Expensive — doubles page count |
| Readability (long docs) | Dense — can cause fatigue | Open — easier on the eyes |
Word Count to Page Count
Based on 12pt Times New Roman, 1-inch margins, standard prose. HS = 1.5 (half-space) spacing.
| Word Count | Single Spaced | 1.5 Spaced | Double Spaced |
|---|---|---|---|
| 500 words | ~1 page | ~1.4 pages | ~2 pages |
| 1,000 words | ~2 pages | ~2.9 pages | ~4 pages |
| 1,500 words | ~3 pages | ~4.3 pages | ~6 pages |
| 2,000 words | ~4 pages | ~5.7 pages | ~8 pages |
| 3,000 words | ~6 pages | ~8.5 pages | ~12 pages |
| 5,000 words | ~10 pages | ~14 pages | ~17–20 pages |
| 10,000 words | ~20 pages | ~28 pages | ~38–40 pages |
| 50,000 words | ~100 pages | ~143 pages | ~190 pages |
| 90,000 words | ~180 pages | ~257 pages | ~360 pages |
Style Guide Requirements
| Style Guide | Spacing | Font |
|---|---|---|
| APA 7th Edition | Double | Times New Roman 12pt or Calibri 11pt |
| MLA 9th Edition | Double | Times New Roman 12pt (recommended) |
| Chicago 17th | Double | Times New Roman 12pt |
| Shunn Manuscript | Double | Courier New 12pt |
| Business Report | Single | Calibri 11pt or Arial 11pt |
| Legal Documents | Double | Times New Roman 12pt |
Quick Decision Guide
Use Single Spacing when…
- Business emails, memos, and internal reports
- Resumes and cover letters
- Printed reference materials and handouts
- Web content and blog posts
- Technical documentation
- Personal or informal writing
- Any document where space efficiency matters
Use Double Spacing when…
- Academic essays and research papers (APA, MLA, Chicago)
- Novel and short story manuscript submissions
- Legal briefs and court filings
- Documents that will be reviewed, graded, or annotated
- Graduate theses and dissertations (check guidelines — may be 1.5)
- Any submission where the style guide specifies it
Deep Dive
Single Spacing
Single spacing sets the line height to exactly one line — meaning the bottom of one line of text sits directly at the top of the next with only the built-in font leading (the internal spacing designed into the typeface). For 12pt text, this produces approximately 14.4pt of total vertical space per line (the font's default leading is typically 120% of the point size). At this density, a standard A4 or US Letter page with 1-inch margins fits approximately 45–50 lines of text and 500–600 words of prose.
Single spacing is the professional default for business communication. Email clients, word processors, and most web interfaces default to single or near-single spacing (Microsoft Word's Calibri 11pt default actually uses 1.08 spacing with 8pt after-paragraph spacing — visually similar to 1.15). Business reports, proposals, presentations, and all forms of corporate communication use single spacing because paper efficiency, screen space, and reading speed are all prioritised over annotation space.
Note: "single spaced" in modern word processors is not the same as "exactly" spacing. Word's Single option uses the font's natural leading (variable per font); Exactly 12pt would produce denser, potentially clipping text with descenders. Use the Single or At Least options, not Exactly, unless you have a specific typographic reason.
Double Spacing
Double spacing sets the line height to twice the single-spaced line height — approximately 28.8pt for 12pt text. This creates a full blank line between each printed line of text, roughly halving the word count per page. A standard double-spaced page at 12pt Times New Roman with 1-inch margins holds approximately 25–27 lines and 250–300 words.
The convention of double spacing in academic and legal writing dates to the typewriter era. Manual typewriters could only advance by fixed line increments — typically single, one-and-a-half, or double space — by engaging a ratchet mechanism on the platen. Double spacing became standard for manuscripts submitted for editing because it gave editors and proofreaders room to write corrections, insertions, and queries directly between lines. The convention persisted through the desktop publishing era and is now formally codified in every major academic style guide.
APA 7th, MLA 9th, and Chicago 17th all require double spacing throughout the document — not just the body text, but also block quotes, references/bibliography, footnotes, and titles. Many students make the mistake of single-spacing reference lists or block quotes; this is a formatting error under all three style guides.
Real-World Patterns
Academic Essays and Research Papers
APA, MLA, and Chicago all require double spacing — this is non-negotiable for graded submissions. The formatting serves two purposes: it gives instructors room to write feedback between lines, and it creates a visual separation that makes long academic prose easier to follow. A 5-page double-spaced assignment typically requires 1,200–1,500 words. If an assignment specifies '5 pages' without a spacing requirement, assume double-spaced — the academic default. Submitting single-spaced when double is required is a formatting error that many instructors penalise.
Novel Manuscript Submissions
Literary agents and publishers universally require double-spaced manuscripts in Shunn format (Courier New or Times New Roman 12pt, ~250 words per page). This convention dates from the typewriter era — double spacing left room for editorial pencil marks, and Courier New mimicked the typewriter's monospace output. A 90,000-word novel runs approximately 360 pages in standard manuscript format. Word count, not page count, is the standard measure for novel length: short novel = 50,000–80,000 words; standard novel = 80,000–100,000 words; epic fantasy/sci-fi = 100,000–150,000 words.
Business and Professional Documents
Business reports, proposals, executive summaries, and professional correspondence use single spacing as the default. The reasoning is practical: executives and clients read quickly, documents are rarely annotated on paper, and printing costs scale with page count. A well-formatted business report uses single spacing with clear section headings, white space between sections, and 11pt Calibri or Arial — Microsoft's default since Office 2007. Cover letters use single spacing with a blank line between paragraphs (not first-line indents). Resumes use single spacing almost universally.
Legal Documents and Court Filings
US federal courts require double spacing for briefs under the Federal Rules of Civil Procedure (Rule 32 for appellate briefs). Most state courts have similar requirements. The rationale is the same as academia: judges and clerks annotate documents heavily. Legal documents also specify minimum font size (12pt or larger) and minimum margins (1 inch). Page limits in court filings are strictly enforced — double spacing directly affects how much argument you can present within the limit. Some jurisdictions now accept word-count limits instead of page limits to eliminate formatting gaming.
Which should you use?
Check your submission requirements first — if a style guide or instructor specifies the format, there is no choice to make. Double spacing is mandatory for academic essays (APA, MLA, Chicago) and manuscript submissions. Single spacing is the professional default for all other contexts.
If no format is specified, use single spacing for business and professional documents, and double spacing for anything that will be reviewed, graded, or annotated. When in doubt in academic contexts, default to double — it is easier to compress than to explain why you submitted the wrong format.
Decision Checklist
| Scenario | Use |
|---|---|
| Academic essay submitted for grading | Double Spaced |
| Business report or executive summary | Single Spaced |
| Novel manuscript sent to a literary agent | Double Spaced |
| Resume or CV | Single Spaced |
| Court filing or legal brief | Double Spaced |
| Email or internal memo | Single Spaced |
| Graduate thesis or dissertation | Double or 1.5 (check guidelines) |
| Technical documentation or user manual | Single Spaced |
| Document that will be printed and annotated | Double Spaced |
| Printed reference handout | Single Spaced |
| Short story submission to a literary magazine | Double Spaced |
| Press release or media kit | Single Spaced |
Frequently Asked Questions
How many words fit on a single-spaced page?
A standard single-spaced page (12pt Times New Roman, 1-inch margins, A4 or US Letter) fits approximately 500–600 words. The exact count depends on font, font size, margins, and paragraph spacing. At 11pt, you get slightly more (~550–650 words). At 14pt, fewer (~400–450 words). These are prose estimates — documents with headings, lists, or tables will have lower word counts per page.
How many words fit on a double-spaced page?
A standard double-spaced page (12pt Times New Roman, 1-inch margins) fits approximately 250–300 words — roughly half the single-spaced count. This is why most academic essays are assigned in double-spaced format: a 1,000-word essay becomes a 3–4 page document rather than a dense 2-page block. At 11pt double-spaced, you get approximately 270–330 words per page.
Why do professors require double spacing?
Double spacing serves three purposes: (1) Readability — the extra whitespace between lines reduces eye fatigue when reading long documents. (2) Annotation space — professors need room between lines to write feedback, corrections, and comments directly on the paper. (3) Standardisation — a consistent format makes it easier to estimate length and compare submissions. APA, MLA, and Chicago citation styles all require double spacing for academic papers precisely because annotation space is essential in an educational context.
What is 1.5 line spacing and when is it used?
1.5 line spacing is the midpoint between single and double spacing — lines are separated by 1.5 times the line height. It fits approximately 350–400 words per page at 12pt. It is commonly used in business reports, theses, and technical documents where readability matters but the extreme openness of double spacing is unnecessary. Microsoft Word's 'Multiple' spacing set to 1.5, or the dedicated '1.5 lines' option, produces this. Many style guides for graduate theses specify 1.5 spacing as a compromise between readability and page economy.
Does font choice affect words per page as much as line spacing?
Yes, significantly. At the same font size and line spacing, different fonts produce very different word counts: Times New Roman (a serif font with relatively narrow characters) fits more words per line than Arial or Calibri. Courier New (a monospace font) fits significantly fewer — approximately 10–15% fewer words per page than Times New Roman at the same size. This is why some students switch fonts to artificially inflate page counts. Academic style guides typically specify the exact font and size (APA: Times New Roman 12pt or Calibri 11pt; MLA: Times New Roman 12pt) precisely to prevent this.
How many pages is a 1,000-word essay single spaced vs double spaced?
At 12pt Times New Roman with standard 1-inch margins: single spaced = approximately 2 pages; double spaced = approximately 4 pages. At 11pt: single spaced = approximately 1.7 pages; double spaced = approximately 3.4 pages. These are estimates for continuous prose — a document with a title page, headings, block quotes, or references will have fewer words per page and therefore more total pages.
What spacing do publishers require for manuscript submissions?
Most literary agents and publishers require double spacing for novel manuscript submissions. The standard manuscript format (Shunn format) specifies: 12pt Courier New or Times New Roman, double spacing, 1-inch margins, and approximately 250 words per page. A 90,000-word novel manuscript should run approximately 360 pages in this format. This convention dates from the typewriter era — double-spaced manuscripts on paper left room for editorial marks and were easier to read during review.
How do I change line spacing in Word, Google Docs, and Pages?
Microsoft Word: Home tab → Line and Paragraph Spacing button (↕ icon) → select 1.0, 1.5, or 2.0. Or: Layout → Paragraph → Line Spacing. Google Docs: Format menu → Line & paragraph spacing → select Single, 1.15, 1.5, or Double. Or use the toolbar spacing icon. Apple Pages: Format panel (right sidebar) → Text tab → Spacing → Line Spacing dropdown. Keyboard shortcut in Word: Ctrl+1 (single), Ctrl+5 (1.5), Ctrl+2 (double). In Google Docs: no direct keyboard shortcut — use the Format menu.
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