Used and loved by millions

Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak quote

Justyna Jupowicz-Kozak

CEO of Professional Science Editing for Scientists @ prosciediting.com

MitStanfordHarvardAustralian Nationa UniversityNanyangOxford

on hour

Grammar usage guide and real-world examples

USAGE SUMMARY

The phrase "on hour" is not correct in standard written English.
The correct expression is "in an hour" or "in one hour," which indicates a time frame of one hour from the present moment. Example: "I will finish my work in an hour."

⚠ May contain grammatical issues

News & Media

Science

Wiki

Human-verified examples from authoritative sources

Exact Expressions

26 human-written examples

The two stubborn teams played on, hour after hour, pitcher after pitcher, until finally, in the bottom of the 18th inning, the greatest relief pitcher of them all entered the fray.

"There's no way it's still — " "You really can't do this one little thing?" "This is my fault?" "I'm on hour twenty-nine of my shift here".

News & Media

The New Yorker

"I'd love to win Roubaix," he confirmed, "[get] up there next year, and off the back of that focus on Hour Record, really invest in that, get the most out of that one attempt, [it will] give me something to do next year".

Construction of parking garages would discourage parking along with minimum parking time of on hour only.

News & Media

The New Yorker

He was given the limited role of pastor of the local congregation, and removed from preaching on "Hour of Power".

News & Media

The New York Times

Contracts at Ford and Chrysler were extended, while the union agreed to keep the G.M. contract in place on hour to hour.

News & Media

The New York Times
Show more...

Human-verified similar examples from authoritative sources

Similar Expressions

34 human-written examples

Some vowels sound very different: my and thy become me and thee; tion, as in commotion, becomes commo-see-on; hour sounds like oar -- or whore, which made one of Shakespeare's puns suddenly make sense.

News & Media

The New York Times

By the appointed power-on hour, I have four pages of scribbled notes waiting to be typed up.

News & Media

Huffington Post

Leave on for one hour.

Open-fronted showrooms give visitors a glimpse at the chocolate-making process, or for total immersion call ahead (519-634-600) thejoin the hands-on, hands-ong workshops and take home the fruits of your labour.

News & Media

BBC

"It was hour-on-hour coverage of the fact that a few cars had been destroyed and some broken windows," she says comparing it to the reporting on Bony, who had spent the weekend in a hospital.

News & Media

Vice
Show more...

Expert writing Tips

Best practice

When referring to a duration of sixty minutes, use "in an hour" or "for an hour" to ensure grammatical correctness.

Common error

Avoid using "on" to indicate a duration. "On" is typically used with specific days or dates. Instead, use "in" or "for" when referring to time spans, for example, "I will be there in an hour" or "The meeting lasted for an hour."

Antonio Rotolo, PhD - Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Antonio Rotolo, PhD

Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Source & Trust

83%

Authority and reliability

2.1/5

Expert rating

Real-world application tested

Linguistic Context

The phrase "on hour" is generally used as a prepositional phrase, intending to specify a duration. However, as Ludwig AI indicates, the correct form requires either the article "an" or the preposition "for" to be grammatically sound. The examples provided often use "on hour" as part of larger phrases, highlighting the need for correction.

Expression frequency: Uncommon

Frequent in

News & Media

35%

Science

35%

Wiki

15%

Less common in

Formal & Business

5%

Academia

5%

Reference

5%

Ludwig's WRAP-UP

The phrase "on hour" is generally considered grammatically incorrect in standard English. As Ludwig AI reports, the correct forms are "in an hour" or "for an hour", depending on the intended meaning. While "on hour" appears in various sources, including news, science, and wikis, its usage is often part of larger phrases where correction is needed. To avoid errors, use "in an hour" to indicate a future time and "for an hour" to indicate a duration. Correcting this phrase will enhance clarity and credibility in your writing. Using alternatives such as "within the hour" or "hourly" might also be helpful.

FAQs

What is the correct way to refer to a period of 60 minutes?

The correct way is to say "in an hour" or "for an hour". Avoid using "on hour" as it is grammatically incorrect. For example, say "I will finish this "in an hour"" instead of "I will finish this on hour".

What are some alternatives to "in an hour"?

You can use phrases like "within the hour", "after one hour", or simply "hourly" depending on the context. For instance, "The report will be ready "within the hour"" or "We update the data hourly".

How do I use "hourly" correctly in a sentence?

"Hourly" is an adjective or adverb that means "every hour" or "based on hours". Example: "The employees are paid "hourly"" or "The bus service runs hourly".

Is there a difference between "in an hour" and "for an hour"?

Yes, "in an hour" indicates a point in the future (e.g., "I'll leave "in an hour""), while "for an hour" indicates a duration (e.g., "I worked "for an hour"").

ChatGPT power + Grammarly precisionChatGPT power + Grammarly precision
ChatGPT + Grammarly

Editing plus AI, all in one place.

Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.

Source & Trust

83%

Authority and reliability

2.1/5

Expert rating

Real-world application tested

Most frequent sentences: