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
CEO of Professional Science Editing for Scientists @ prosciediting.com
mean hours
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "mean hours" is correct and usable in written English.
It can be used to refer to the average amount of time for an activity or task. For example, "We measured how long it took on average to complete the task, which was eight mean hours."
✓ Grammatically correct
Science
News & Media
Alternative expressions(4)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
58 human-written examples
I mean, hours.
News & Media
"I mean, hours or days?" "Days.
News & Media
Dysphagia frequency ranged from 3%to62%2% and intubation duration from 124.8 to 346.6 mean hours.
Science
With only half of the mean hours of sunshine it turned out to be the least sunny spring since 1833.
Science & Research
Helping Dexter set up his artisanal-charcoal business would mean hours clambering up trees in spiked shoes and breathing sawdust.
News & Media
The screen uses a large proportion of your device's energy store; the difference between full brightness and the dimmest can mean hours more battery life.
News & Media
A weekend that is, for one of us, a series of joyous reunions can, for the other, mean hours spent smiling gamely at relative strangers.
News & Media
A tan does not signify a chic trip to Capri, but it could mean hours of hard labour spent out in the harsh sun".
News & Media
"He'd come to the ballpark early every day — and I mean hours early — and we'd go for a run and talk about baseball," Rich said.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
2 human-written examples
Mean hours worked per week ranged from 13 in the Danish home care sector [ 28] to 38 in U.S.-based NHs [ 22].
Science
Almost all (99%) patients reported informal care at baseline, and while this had decreased at follow-up, the mean hours/week were not so different.
Science
Expert writing Tips
Best practice
When using "mean hours" in scientific or technical writing, always specify the period over which the average is calculated (e.g., "mean hours per week", "mean hours per month") for clarity.
Common error
Avoid using "mean hours" to describe a single event or instance. "Mean hours" refers to an average calculated over multiple instances. For a single event, use "duration" or "length of time" instead.
Source & Trust
82%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "mean hours" primarily functions as a noun phrase, acting as a subject or object in a sentence. Ludwig shows that it's used to describe the average duration of something, as in "the mean hours of direct contact with students."
Frequent in
Science
40%
News & Media
35%
Formal & Business
25%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "mean hours" is a grammatically correct and commonly used noun phrase that signifies the average duration of an activity or event. As Ludwig AI indicates, its primary function is to quantify time in a scientific or formal context. It's crucial to define the period for the calculation to ensure clarity. While alternatives like "average hours" exist, "mean hours" is particularly prevalent in academic and scientific literature. Remember to specify the context (e.g., "mean hours per week") for maximum precision. The phrase is most commonly found in science and news contexts.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
average hours
This alternative replaces "mean" with "average", a direct synonym in the context of calculating time.
average length of time
This alternative spells out the meaning more explicitly, using "length of time" instead of "hours".
average time
This phrase uses "average" as well, focusing on the "time" spent rather than quantifying in hours.
median hours
This replaces "mean" with "median", indicating the middle value rather than the average.
typical hours
This alternative suggests a usual or common duration, similar to the concept of average.
usual duration
This emphasizes the standard length of time, removing the explicit mention of 'hours'.
average working hours
This specifies the context as related to work, adding detail to the original phrase.
typical time spent
This highlights the time investment aspect, rather than the calculation of an average.
standard time frame
This alternative refers to an established duration, broadening the concept beyond hours.
nominal period
This suggests a designated time span, which might or might not be based on an average.
FAQs
How to use "mean hours" in a sentence?
You can use "mean hours" to refer to the average time spent on a particular activity. For example, "The "mean hours" of sleep per night for participants in the study was 7.5."
What's the difference between "mean hours" and "median hours"?
"Mean hours" refers to the average time calculated by summing all the times and dividing by the number of instances. "Median hours" is the middle value when all the times are arranged in ascending order. The median is less sensitive to outliers.
What are some alternatives to "mean hours"?
Depending on the context, you can use alternatives such as "average hours", "typical hours", or "average time".
Is it correct to say "the mean hours is" or "the mean hours are"?
When referring to a specific calculated value, use "is". For example, "The "mean hours" is 7.5". If discussing hours in a more general sense, you might use "are", but this is less common.
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.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
82%
Authority and reliability
4.1/5
Expert rating
Real-world application tested