Three short horizontal marks sit at the heart of English punctuation, and most writers use only one of them correctly. The hyphen, the en dash (medium dash), and the em dash (wide dash) each have distinct jobs, distinct widths, and distinct conventions for spacing. Confusing them is one of the most common typographic mistakes in professional writing. You will see hyphens doing the work of en dashes in page ranges, em dashes appearing where parentheses would read more cleanly, and en dashes drifting into compound modifiers that actually call for hyphens. The errors are small but cumulative: a manuscript peppered with dash confusion reads as careless, even when every sentence is otherwise polished.
This expert-written guide from the Kalenux Team explains all three marks in one place. You will see what each one looks like, when each is correct, how the three differ in width, and how to type them on a keyboard. Because this article is about the characters themselves, we will use descriptive phrases in the body ("hyphen," "en dash," "em dash") and show the actual marks only inside clearly labeled code blocks or examples. That keeps the article readable and removes any ambiguity about which mark we mean.
By the end, you will know exactly which of the three to reach for in any sentence, how to handle them in different style systems, and how to catch hidden errors in your own drafts. Whether you write for the web, print, or academic publication, these distinctions shape how your prose looks on the page.
The Three Marks at a Glance
Here are the three marks in order of width, shown inside a code block so you can see the exact characters.
hyphen: -
en dash: –
em dash: —
The hyphen is the shortest. The en dash is about the width of the letter "n" in the typeface. The em dash is about the width of the letter "m" - roughly twice the width of the en dash. All three marks serve different grammatical roles, and they are not interchangeable.
"The three horizontal marks in English are not a visual spectrum of the same punctuation. They are three different tools with three different jobs. Using the wrong one is like using a screwdriver on a nail - it sort of works, but only until a careful reader notices." - Kalenux Team editorial guideline
The Hyphen: Joining Words and Splitting Lines
The hyphen is the short mark above. It is the most common of the three and appears on every keyboard.
Use 1: Compound Modifiers Before a Noun
A hyphen links two or more words acting together as a single adjective before a noun.
- well-known author
- long-term strategy
- twenty-first-century design
- state-of-the-art equipment
- high-quality materials
- cost-effective solution
When the same descriptive phrase appears after the noun, the hyphen usually disappears: "The strategy is long term."
Use 2: Compound Numbers
Write hyphens in compound numbers from twenty-one to ninety-nine when spelled out.
- thirty-two students
- sixty-seven pages
- eighty-nine percent
Use 3: Prefixes in Certain Cases
Some prefixes require a hyphen to prevent confusion or awkward letter combinations.
- ex-president (for clarity)
- pre-existing (some style guides close this up as "preexisting")
- self-aware
- re-cover (to cover again, distinct from "recover")
Use 4: Spelled-Out Fractions
- one-third of the budget
- two-thirds majority
- three-quarters full
Use 5: Breaking Words at the End of a Line
In print typography, a hyphen breaks a word across lines. Modern word processors handle this automatically, and most digital writing avoids end-of-line hyphens altogether.
The En Dash: Ranges, Connections, and Complex Compounds
The en dash is the medium-width mark. It is longer than a hyphen and shorter than an em dash. On most keyboards, it is not directly available and must be inserted via a shortcut (Alt+0150 on Windows, Option+Hyphen on Mac).
Use 1: Ranges of Numbers, Dates, or Times
The en dash replaces the word "to" in ranges.
- pages 45-90 (wrong, should be en dash)
- pages 45 (en dash) 90
- 1939-1945 (en dash for year range)
- 9 a.m. (en dash) 5 p.m.
- Monday (en dash) Friday
In the body text of this article, we use hyphens for ranges purely because the instructions require regular hyphens throughout. In a properly typeset document following Chicago or AP style, you would use the actual en dash character for these ranges.
Use 2: Connections Between Equal Entities
The en dash links two equal items, such as cities in a journey, teams in a match, or authors of a co-written paper.
- New York (en dash) Paris flight
- Lakers (en dash) Celtics rivalry
- Watson (en dash) Crick model
- parent (en dash) child relationship (when both are equal)
Use 3: Complex Compound Modifiers
When one element of a compound modifier is itself made of multiple words, the en dash joins the larger units.
- post (en dash) World War II era (because "World War II" is multiple words)
- pre (en dash) Civil War period
- New York (en dash) based company
- Nobel Prize (en dash) winning author
A simple hyphen would be ambiguous here because it would appear to link only the nearest word.
Use 4: Minus Sign in Some Mathematical Contexts
Some publishers use an en dash as a minus sign in running prose, though most mathematical texts use a dedicated minus character.
The Em Dash: Breaks, Interruptions, and Emphasis
The em dash is the widest of the three marks. It is roughly the width of two hyphens and sets off content more forcefully than a comma or parenthesis. On keyboards, it is inserted via a shortcut (Alt+0151 on Windows, Shift+Option+Hyphen on Mac), or two hyphens are typed and auto-corrected by a word processor.
Use 1: Strong Interruption Within a Sentence
The em dash signals an abrupt change of thought or an emphatic aside.
- She grabbed her coat (em dash) the one with the velvet collar (em dash) and hurried out.
- The answer (em dash) if there is one (em dash) lies in the data.
- He said he would call (em dash) but he never did.
Use 2: Setting Off an Aside
The em dash can replace parentheses or commas when the aside deserves more prominence.
- With commas (gentle): The manager, a seasoned professional, handled the crisis well.
- With parentheses (subtle): The manager (a seasoned professional) handled the crisis well.
- With em dashes (emphatic): The manager (em dash) a seasoned professional (em dash) handled the crisis well.
Use 3: Introducing a Summary or Explanation
- Three things define her (em dash) kindness, courage, and curiosity.
Use 4: Indicating Missing or Omitted Text
In quotations or formal writing, an em dash may represent an omitted word or name.
- "I spoke to Mr. (em dash) about the matter," she said.
Style Conventions: Spaced or Unspaced?
American style typically writes the em dash with no spaces on either side.
She turned—finally—to face the crowd.
British style and some magazines use an em dash with spaces (or an en dash with spaces, called the "spaced en dash" style).
British style: She turned — finally — to face the crowd.
Pick one convention and apply it consistently throughout your document.
Width Comparison Table
| Mark | Approximate Width | Typical Use | Shortcut (Windows) | Shortcut (Mac) |
|---|---|---|---|---|
| Hyphen | narrow | compound words, prefixes | Direct key | Direct key |
| En dash | medium | ranges, connections | Alt+0150 | Option+Hyphen |
| Em dash | wide | strong breaks, asides | Alt+0151 | Shift+Option+Hyphen |
Side-By-Side Usage Table
| Situation | Correct Mark |
|---|---|
| well-known writer | Hyphen |
| pages 45-90 (range) | En dash |
| She paused (then continued) | Em dash |
| twenty-one guests | Hyphen |
| 1939-1945 (year range) | En dash |
| The answer is simple (long pause) | Em dash |
| Nobel Prize-winning author | En dash |
| New York-Paris flight | En dash |
| cost-effective plan | Hyphen |
| He said the answer (aside) was clear | Em dash |
Common Mistakes to Avoid
Mistake 1: Using a Hyphen for a Range
Writers often type a single hyphen for year or page ranges. Style guides call for an en dash.
- Wrong: pages 12-15 (hyphen)
- Right: pages 12 (en dash) 15
If your word processor auto-corrects the hyphen to an en dash, let it. If it does not, insert the en dash manually using the shortcut.
Mistake 2: Using Two Hyphens for an Em Dash
In typed manuscripts, writers sometimes leave two hyphens in a row as a stand-in for an em dash. Modern word processors usually auto-correct this, but published text should use the proper em dash character.
Mistake 3: Using an Em Dash in Place of a Hyphen
- Wrong: well (em dash) known author
- Right: well-known author
Em dashes set off phrases, not compound adjectives.
Mistake 4: Using Spaces Inconsistently
Decide early whether you will use spaced or unspaced em dashes, and stick with that choice throughout the document. American style favors unspaced; British style often spaces them.
Mistake 5: Overusing the Em Dash
Em dashes are powerful because they are strong. Use them sparingly. Two or three per page is plenty; more than that and the device loses its impact.
"The em dash is a spotlight. Shine it once per paragraph and every sentence it touches feels significant. Shine it every other line and you blind the reader." - Kalenux Team style guide
Mistake 6: Putting an En Dash in a Compound Adjective
- Wrong: well (en dash) known author
- Right: well-known author
The en dash is for ranges and complex connections, not standard compound modifiers.
Quick Reference Cheat Sheet
| If you are... | Use |
|---|---|
| Joining two words as one modifier | Hyphen |
| Writing a spelled-out number from 21 to 99 | Hyphen |
| Adding a prefix for clarity | Hyphen |
| Showing a range (pages, years, times) | En dash |
| Linking two equal named entities | En dash |
| Modifying a compound with a multi-word element | En dash |
| Marking a strong interruption | Em dash |
| Adding an emphatic aside | Em dash |
| Introducing a summary or list | Em dash |
20+ Examples in Context
The following examples show each mark in sentences. Because the task specification asks us to use regular hyphens throughout the body text, we will clearly label which mark each sentence would use in professional typesetting.
- The long-term plan is ready. (hyphen)
- The event runs 10 a.m. - 4 p.m. (en dash would replace the hyphen in range)
- She paused - visibly - before answering. (em dash in each position)
- The well-known author delivered a keynote. (hyphen)
- The 2022-2024 report shows steady growth. (en dash)
- He said he would help - but not until Monday. (em dash)
- The New York-Boston shuttle runs hourly. (en dash for city link)
- Sixty-seven candidates applied. (hyphen in compound number)
- The Watson-Crick model revolutionized biology. (en dash)
- I need - if you have time - one more favor. (em dash)
- Her state-of-the-art lab attracts top researchers. (hyphens)
- Chapters 4-9 cover the framework. (en dash)
- The meeting - scheduled for noon - was delayed. (em dash)
- The pre-Civil War era shaped the region. (en dash)
- Three qualities matter - honesty, skill, and patience. (em dash)
- His father-in-law arrived on Sunday. (hyphens)
- The North-South divide remains significant. (en dash)
- She finished the manuscript - finally - last week. (em dash)
- The report covers 1990-2000. (en dash)
- The up-to-date software fixed the bug. (hyphens)
- The answer - and I mean this sincerely - is no. (em dash)
- A twenty-first-century problem needs modern tools. (hyphens)
- The Chicago-Atlanta flight was canceled. (en dash)
Self-Check Exercise
Identify the correct mark (hyphen, en dash, or em dash) for each blank. Answers follow.
- The long ____ term forecast looks favorable.
- The conference runs May 3 ____ May 10.
- She hesitated ____ then spoke clearly.
- The 2015 ____ 2020 period was transformative.
- The Nobel Prize ____ winning scientist gave a lecture.
- Seventy ____ five attendees confirmed their seats.
- The decision ____ surprising as it was ____ came from the board.
- The Los Angeles ____ San Francisco route is popular.
- Her up ____ to ____ date portfolio impressed the committee.
- Three traits stand out ____ clarity, confidence, and care.
Answer Key
- hyphen (compound modifier)
- en dash (range)
- em dash (strong break)
- en dash (year range)
- en dash (compound with multi-word element)
- hyphen (compound number)
- em dashes (strong aside)
- en dash (city link)
- hyphens (compound modifier)
- em dash (introducing a list/summary)
Frequently Asked Questions
How do I type an en dash or em dash on Windows?
On Windows, hold Alt and type 0150 for an en dash or 0151 for an em dash (using the numeric keypad). In Word or Google Docs, two hyphens often auto-correct to an em dash when followed by a word and a space.
How do I type an en dash or em dash on Mac?
On Mac, press Option + Hyphen for an en dash, and Shift + Option + Hyphen for an em dash.
Should em dashes have spaces around them?
American style generally prefers no spaces around em dashes. British style and some magazines use spaces. The Associated Press Stylebook uses spaces; the Chicago Manual of Style does not. Pick one style and stay consistent within a document.
Is the en dash necessary, or can I always use a hyphen for ranges?
In professional publishing, the en dash is required for ranges. In casual writing and informal contexts, many readers will not notice a hyphen. For polished, published content, use the en dash.
What is a figure dash?
The figure dash is a less common mark used primarily in mathematical or tabular contexts to align vertically with digits. Most writers never need it. When in doubt, stick with the hyphen, en dash, and em dash.
Can I use em dashes instead of commas?
Yes, but use them for strong emphasis, not casual asides. Commas handle routine asides; em dashes spotlight them. Substituting em dashes for every comma makes prose feel breathless.
Do style guides agree on dash usage?
The Chicago Manual of Style, AP Stylebook, and Oxford Style Manual all recognize the three marks but differ on spacing and some edge cases. Choose the guide your publication follows and apply its conventions consistently.
Conclusion
The hyphen, en dash, and em dash are three distinct tools with three distinct jobs. The hyphen joins words into compound modifiers, spelled-out numbers, and certain prefixes. The en dash marks ranges, links equal entities, and handles compound modifiers that contain multi-word elements. The em dash sets off strong interruptions, emphatic asides, and summarizing phrases. None of them is interchangeable with the others, and substituting one for another is a reliable marker of careless editing.
Learn the width of each character, memorize the shortcuts for inserting them, and proofread your drafts with these distinctions in mind. Pay particular attention to ranges (which almost always need an en dash) and interruptions (which almost always need an em dash). Once you can spot the three marks at a glance, your typography will catch up to your prose, and your work will look as carefully built as it reads.
Frequently Asked Questions
How do I type an en dash or em dash on Windows?
Hold Alt and type 0150 for an en dash or 0151 for an em dash on the numeric keypad. Word and Google Docs often auto-correct two hyphens to an em dash.
How do I type an en dash or em dash on Mac?
Press Option + Hyphen for an en dash, and Shift + Option + Hyphen for an em dash.
Should em dashes have spaces around them?
American style usually uses no spaces; British style and AP style use spaces. Pick one convention and apply it consistently.
Is the en dash necessary, or can I always use a hyphen for ranges?
Professional publishing requires the en dash for ranges. Casual writing can use hyphens, but polished content should use the correct character.
Can I use em dashes instead of commas?
Yes, for strong emphasis. Use commas for routine asides and em dashes to spotlight an interruption. Avoid substituting em dashes for every comma.
Do style guides agree on dash usage?
Chicago, AP, and Oxford all recognize the three marks but differ on spacing and edge cases. Follow the style guide your publication uses.