half an our (half an hour)

Writers sometimes write or say "half an our" when they mean "half an hour." Below are clear rules, pronunciation tips, hyphenation notes, plenty of copy-paste fixes, and quick checks you can use in work, school, and casual contexts.

Quick answer

Use "half an hour." The h in hour is silent, so the word begins with a vowel sound and takes the article an. "Our" is a possessive pronoun and does not mean the unit of time.

Say "an hour" and "half an hour" for durations.
Write "half-hour" with a hyphen only when it modifies a noun before it: a half-hour meeting.
Pick a or an by sound, not spelling.

Core explanation: silent h and the article rule

Articles follow sound. Hour starts with a vowel sound (/aʊ/) because its initial h is silent, so it takes an. The word our is unrelated: it's a possessive pronoun (our car, our plan), not the time unit.

hour → silent h → vowel sound → an hour
our → possessive pronoun → not a time unit

Grammar rule: choose a or an by sound

Say the next word aloud and listen for the first sound. Use an before vowel sounds (an hour, an honor, an MBA) and a before consonant sounds (a history, a house). This handles silent h and initial-letter acronyms.

an hour, an honor, an honest mistake (silent h)
a history book, a hospital visit (pronounced h)
an MBA (starts with the vowel sound "em")

Hyphenation and spacing: half-hour vs half an hour

Use "half an hour" (three words) when stating a duration. Hyphenate only when the phrase modifies a noun before it: "a half-hour meeting."

Modifier before noun (hyphen): a half-hour call, a ten-minute break
Not a modifier / after verb (no hyphen): The break lasted half an hour.
Avoid forms like "half-an-hour" or "halfour."

Real usage and tone: work, school, casual

Keep the same article and hyphenation rules across registers; choose wording to match tone. Below are practical sentences you can copy or adapt.

Work: Please reserve an hour for the client demo. / Let's schedule a half-hour sync to review the deck. / The training session will last an hour.
School: You have half an hour to complete the quiz. / Spend half an hour drafting your answer. / The lab session is an hour long.
Casual: Be there in half an hour. / Give me an hour to get ready. / We chatted for half an hour before dinner.

Examples: wrong → right (copy these fixes)

Common incorrect forms and direct fixes. Copy the "Right" line when you edit.

Wrong: I waited half an our for the bus.
Right: I waited half an hour for the bus.
Wrong: She spent half our on homework.
Right: She spent half an hour on homework.
Wrong: Can you give me a hour?
Right: Can you give me an hour?
Wrong: We have a hour-long meeting tomorrow.
Right: We have an hour-long meeting tomorrow.
Wrong: I'll be back in half-hour.
Right: I'll be back in half an hour.
Wrong: He practiced piano half hour yesterday.
Right: He practiced piano for half an hour yesterday.

Rewrite help: quick pasteable fixes

If you spot the incorrect phrase, use one of these replacements to fix sentences quickly.

Replace "half our" → "half an hour".
Replace "a hour" → "an hour".
Replace "half-hour" (after verb) → "half an hour".

Rewrite:
Wrong: "Can you wait half our?" →
Right: "Can you wait half an hour?"
Rewrite:
Wrong: "a hour is enough." →
Right: "An hour is enough."
Rewrite:
Wrong: "The meeting lasted half-hour." →
Right: "The meeting lasted half an hour."
Rewrite:
Wrong: "She did half our of the work." →
Right: "She did half an hour of the work." (or "She did half the work" if timing isn't intended)
Rewrite:
Wrong: "I can meet in half." →
Right: "I can meet in half an hour."

Fix your own sentence: a short editing checklist

Is the meaning the time unit (60 minutes)? If yes, use hour.
Say the next word aloud - does it start with a vowel sound? If yes, use an.
If the phrase modifies a noun before it, hyphenate (a half-hour meeting).
Scan for " our " or "our" used near time phrases - if it refers to duration, replace with "hour" and reapply steps 1-3.

Memory tricks: quick ways to remember

Fast checks you can run in seconds when writing or speaking.

Drop the h in your head and pronounce: "our" → vowel sound → use an.
If the word is a time unit, it should be "hour" not "our"; then check the article.
Repeat the phrase aloud a few times: "half an hour, half an hour" - hearing it fixes the article.

Similar mistakes to watch for

Fixing "half an our" helps avoid other sound-based errors.

Use an hour, an honor, an honest mistake (silent h words).
Decide by pronunciation for words like "historic" - some dialects say "an historic," others "a historic."
Use an before acronyms beginning with a vowel sound: an MBA, an FBI agent (if pronounced "eff").
Hyphenate adjectival time phrases before nouns: ten-minute task vs. ten minutes later (no hyphen).

FAQ

Is it "half an our" or "half an hour"?

Always "half an hour" for 30 minutes. "Our" is a possessive pronoun; "hour" is the time unit and takes an because its initial h is silent.

Should I use "half-hour" or "half an hour" in formal writing?

Use "half an hour" in running text. Use "half-hour" with a hyphen only when the phrase directly modifies a noun before it (a half-hour meeting).

Why "an hour" but "a history"?

Articles follow sound. "Hour" starts with a vowel sound (silent h) → an. "History" starts with a pronounced h → a.

Is "an hour and a half" the same as "one and a half hours"?

Yes. Both mean 90 minutes. "An hour and a half" is common in speech; "one and a half hours" is explicit and numeric.

How do I stop typing "our" when I mean "hour"?

Run a quick search for " our " or read time phrases aloud. When the meaning is duration, replace "our" with "hour," then check article and hyphenation.

Try your own sentence

Test the whole sentence, not just the phrase - context usually makes the correct form clear.

Still unsure? A soft CTA

When you're sending important emails, submitting assignments, or publishing content, a grammar checker that flags a/an and word-choice errors can save time and prevent small but noticeable mistakes. Try a quick check before you hit send.