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
a key factor in
Grammar usage guide and real-world examplesUSAGE SUMMARY
"a key factor in" is correct and usable in written English.
You can use it when you want to introduce an important element that affects something else. For example: "Proper nutrition is a key factor in maintaining optimal health."
✓ Grammatically correct
News & Media
Science
Formal & Business
Alternative expressions(20)
a crucial component of
a significant influence on
a primary contributor to
an integral part of
a vital aspect of
a central aspect of
a critical element for
a driving force behind
a significant element in
a major component of
a crucial aspect of
A key factor in
a vital ingredient for
a primary driver of
a fundamental reason for
a decisive influence on
a pivotal factor in
a primary factor in
a substantial factor in
a key player in
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
59 human-written examples
"A key factor in parkour is gradualism," he said.
News & Media
So why isn't it a key factor in the marketing?
News & Media
Forestry is a key factor in northern Manitoba's economy.
Encyclopedias
Bucks Coach George Karl said Collins was a key factor in the Nets' victory.
News & Media
Royal Holloway Stress is a key factor in causing bee colonies to fail, research finds.
News & Media
Defense has been a key factor in Sheepshead Bay's success this season.
News & Media
It is certain that Arkhipov's reputation was a key factor in the control room debate.
News & Media
It absolutely could be a key factor in the coming election".
News & Media
Technology will be a key factor in holding temperatures to a modest level.
News & Media
The insecurity was a key factor in the exodus, according to residents.
News & Media
Allegri's tactical modifications were a key factor in Juve's treble bid.
News & Media
Expert writing Tips
Best practice
When using "a key factor in", ensure that the sentence clearly explains what is being influenced or affected. This provides context and clarifies the significance of the factor.
Common error
Avoid using "a key factor in" when the element is only a minor influence. Overstating its importance can weaken your argument.
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "a key factor in" functions as a prepositional phrase, introducing a noun or noun phrase that is identified as significantly contributing to a particular situation or outcome. Ludwig provides numerous examples illustrating this function.
Frequent in
News & Media
35%
Science
30%
Formal & Business
15%
Less common in
Wiki
10%
Encyclopedias
5%
Academia
5%
Ludwig's WRAP-UP
In summary, "a key factor in" is a versatile and widely used phrase for highlighting the importance of an element within a specific context. As Ludwig AI confirms, it is grammatically correct and suitable for various writing styles. It's crucial to use this phrase accurately, ensuring the identified factor truly plays a significant role. Alternatives such as "a major element in" or "a crucial component of" can provide variety while maintaining the intended meaning. The phrase's frequent presence in news, science, and business contexts underscores its broad applicability and reliability.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
a major element in
Emphasizes the significant part played in something.
a crucial component of
Highlights that something is essential and vital.
a significant influence on
Focuses on the power to affect someone or something.
a primary contributor to
Stresses the role of something in actively bringing about a result.
an integral part of
Highlights that something is necessary to complete the whole.
a vital aspect of
Emphasizes that something is necessary for the success or continued existence of something.
a central aspect of
Highlights the importance of something as the focal point.
a critical element for
Implies a high degree of importance and necessity.
a notable influence within
Highlights the remarkable effect that something has.
a driving force behind
Implies that something is the impetus or motivation for an action or outcome.
FAQs
How can I use "a key factor in" in a sentence?
Use "a key factor in" to highlight something crucial influencing an outcome. For example, "Motivation is "a key factor in" achieving success".
What are some alternatives to "a key factor in"?
You can use alternatives like "a major element in", "a crucial component of", or "a significant influence on" depending on the context.
Is it better to say "key factor for" or "key factor in"?
"A key factor in" is generally preferred because it indicates that something is influential within a particular context or situation. "Key factor for" can be used, but it's less common.
What's the difference between "a key factor" and "the key factor"?
"A key factor" suggests one of several important elements, while "the key factor" implies that it is the single most important element.
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
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested