The hyphen vs dash mix-up is one of the most common punctuation mistakes — everyone calls it a ‘dash,’ but the hyphen isn’t a dash at all — it’s the shortest of three separate horizontal marks, and it has its own specific job. Mixing it up with a dash changes how correct your writing looks, even if the sentence still makes sense.
What Is a Hyphen?
A hyphen (-) is the shortest of the three horizontal punctuation marks. It joins words or parts of words together, sits with no space on either side, and never stands in for a pause or a break the way a dash does.
Hyphen vs. En Dash vs. Em Dash
| Mark | Symbol | Job | Example |
|---|---|---|---|
| Hyphen | – | Joins words or word parts | well-known author |
| En dash | – | Shows a range or connection | pages 10–20 |
| Em dash | — | Creates a strong break or pause | She opened the door — and froze. |
For the full breakdown of the em dash specifically, see our Em Dash guide.
When to Use a Hyphen
- Compound adjectives before a noun: “a well-known author” (but “the author is well known” — no hyphen after the noun)
- Compound numbers: twenty-one through ninety-nine
- Certain prefixes: “mid-July,” “self-aware,” “ex-husband”
- Avoiding confusing letter collisions or a different meaning: “re-cover” (cover again) vs. “recover” (get better) — the hyphen changes the meaning entirely
- Word breaks at the end of a line: less common today, but still used in print typesetting
Common Mistakes
- Using a hyphen where an em dash belongs. The single biggest mix-up — a hyphen can’t create the dramatic break a dash creates.
- Hyphenating a compound adjective after the noun. “A well-known author” needs the hyphen; “the author is well known” doesn’t.
- Being inconsistent within one document. If you hyphenate “e-mail” once, don’t switch to “email” later in the same piece.
Frequently Asked Questions
Should I use a hyphen for an interruption in a sentence?
No — that’s an em dash‘s job. A hyphen only joins words together.
Do compound adjectives always need a hyphen?
Only when they come directly before the noun they describe. After the noun, they usually don’t need one.
How do I type an en dash or em dash instead of a hyphen?
See the typing shortcuts on our Em Dash page — they work the same way for both.
Quick Reference
- Symbol: – (shortest of the three horizontal marks)
- Main use: joins words or word parts, no spaces
- Not for: pauses, breaks, or ranges — that’s the dash family’s job
Quick practice: Hyphenate correctly — “She gave a well thought out answer.” (Answer: “She gave a well-thought-out answer.”)