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
upon their interest
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "upon their interest" is grammatically correct and usable in written English.
You can use it to refer to something that depends on another person or group's interest in it. For example, "The success of the film will depend upon their interest in watching it."
✓ 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
2 human-written examples
They were recruited based upon their interest in quitting smoking.
Science
Participants were recruited based upon their interest and availability to attend one of the focus group sessions.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
55 human-written examples
Every conceivable athletic encounter I made sure they were exposed to, and they made a decision based upon their interests to pick a sport they thought they could excel in.
News & Media
Moreover, they serve an important purpose to financial markets by creating opportunities for companies and individuals to act upon their interest-rate expectations.
News & Media
His overall vision for MyAds is to quickly focus on monetizing MySpace by utilizing this new hypertargeting which now gives users the ability to target a professional and creative campaign to practically anyone on MySpace based upon their interests and location.
News & Media
The point is that it is important to make sure students are pursuing jobs that fit with and build upon their interests.
News & Media
Snopes: "While sagging did gain its start in the U.S. prison system, it was not a clothes-wearing style authored by imprisoned homosexuals intent upon advertising their interest in casual flings.
News & Media
By teaching girls the basics of Computer Science at a young age, they can build upon their natural interest and make something bigger out of it.
News & Media
Subscription members can get discounts on full bottles if they stumble upon something that piques their interest.
News & Media
However, it also implies that the subject is incapable of realising and acting upon their best interests but that the humanitarian actor has the moral and expert authority to do so.
Some of the study questions were related to personal details of the respondents related to their attitude, behaviour, self-motivation and belief, and hence, it can be expected that the individual responses may depend upon their self-interests.
Science
Expert writing Tips
Best practice
When using "upon their interest", ensure the context clearly establishes whose interest is being referenced to avoid ambiguity. For example, specify "upon the students' interest" rather than simply "upon their interest".
Common error
While "upon" and "on" are often interchangeable, "upon" can sound more formal or emphatic. Using "on their interest" might be grammatically correct, but "upon their interest" adds a subtle layer of formality suitable for certain contexts.
Source & Trust
84%
Authority and reliability
4.2/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "upon their interest" functions as a prepositional phrase modifying a verb or noun. It typically indicates a condition, dependence, or basis for something, aligning with Ludwig's assessment of grammatical correctness.
Frequent in
Science
33%
News & Media
33%
Formal & Business
33%
Less common in
Wiki
0%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "upon their interest" is a grammatically correct phrase that functions as a prepositional phrase, indicating conditionality or dependence. While not extremely common, as highlighted by Ludwig, it finds application across scientific, news, and business contexts. When using this phrase, ensure clarity regarding whose interest is referenced, and be mindful of the slightly formal tone that "upon" can convey. Consider alternatives like "depending on their interest" or "based on their interest" for less formal settings.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
depending on their interest
Replaces "upon" with "depending on", altering the preposition while retaining the core meaning of conditionality.
based on their interest
Substitutes "upon" with "based on", shifting from dependence to foundation or justification.
according to their interest
Replaces "upon" with "according to", indicating agreement or alignment with their interest.
contingent on their interest
Uses "contingent on" instead of "upon", emphasizing the conditional nature of the relationship.
subject to their interest
Employs "subject to", indicating that something is conditional or controlled by their interest.
reliant on their interest
Replaces "upon" with "reliant on", highlighting the dependence on their interest.
driven by their interest
Indicates that their interest is the motivating force.
guided by their interest
Suggests that their interest provides direction or guidance.
influenced by their interest
Their interest has an effect on something.
predicated on their interest
Uses "predicated on" instead of "upon", indicating the interest is a necessary condition.
FAQs
How can I rephrase "upon their interest" to sound less formal?
Consider using alternatives such as "depending on their interest", "based on their interest", or simply "according to their interest".
Is there a difference between saying "based on their interest" and "upon their interest"?
While similar, "based on their interest" implies a foundation or reason, whereas "upon their interest" suggests a condition or dependence. The choice depends on the specific nuance you wish to convey.
When is it appropriate to use "upon their interest" instead of a simpler phrase?
Use "upon their interest" when you want to add a touch of formality or emphasis to the conditional relationship. It's suitable for academic, formal, or professional writing where precision and tone are important.
What does "depending "on"" mean in a similar context?
"Depending on" indicates that something varies or is contingent upon a specific factor, much like "upon their interest". For example, "The project's success depends on their interest and active support."
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
84%
Authority and reliability
4.2/5
Expert rating
Real-world application tested