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 extent of
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "a extent of" is not correct in English.
Did you mean "an extent of"? You can use "an extent of" when discussing the degree or range of something, often in terms of measurement or impact. Example: "The project will have an extent of influence on the local community."
⚠ May contain grammatical issues
Science
News & Media
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
8 human-written examples
For semi-quantitative grading of histological findings, a 3-grade scoring system was adopted from Schwartz et al. for the following aspects: (a) extent of tissue proliferation within the stent lumen and (b) inflammatory reactions [14].
A multilevel statistical model was built to quantify if there was a significant difference in: a) extent of silver lost, b) initial amount of silver lost, c) silver lost for water of different quality, and d) total coliform removal.
a Extent of cold tolerant accessions, b-d Geographic distribution pattern of cold tolerant (SES score 1-3) accessions, b Latitude-wise distribution, c Longitude-wide distribution, d Area of preference, e-g Geographic distribution pattern of highly cold tolerant (SES score 1) accessions, e Latitude-wise distribution, f Longitude-wide distribution, g Area of preference.
Science
a Extent of alkali tolerant accessions, b-d Geographic distribution pattern of alkali tolerant (SES score 1-3) accessions, b Latitude-wise distribution, c Longitude-wide distribution, d Area of preference, e-g Geographic distribution pattern of highly alkali tolerant (SES score 1) accessions, e Latitude-wise distribution, f Longitude-wide distribution, g Area of preference.
Science
a-d Zinc-deficient field screening, a Extent of tolerant accessions b Latitude-wise distribution, c Longitude-wide distribution, d Area of preference, e-h Greenhouse screening, e Extent of tolerant accessions, f Latitude-wise distribution, f Longitude-wide distribution, g Area of preference.
Science
a Extent of flash flood tolerant accessions, b-d Geographic distribution pattern of flash flood tolerant (SES score 1-3) accessions, b Latitude-wise distribution, c Longitude-wide distribution, d Area of preference, e-g Geographic distribution pattern of highly tolerant (SES score 1) accessions, e Latitude-wise distribution, f Longitude-wide distribution, g Area of preference.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
52 human-written examples
And in the second, the reference is to an extent of time, not a number, so make it "was spent".
News & Media
Thus, every statement regarding the future, as a prognosis, is valid only to an extent of certainty.
In the present study, we obtained an overexpression of miR-200c to an extent of 300 400 times.
Science
However, a recent publication in Cynomolgus monkeys shows an extent of IgG vaginal absorption well below 1%[2223, 23].
The second ionization takes place to an extent of about 25 percent, but HSO4− is nonetheless considered a moderately strong acid.
Encyclopedias
Expert writing Tips
Best practice
Always check for correct article usage ("a" vs. "an") before nouns that begin with a vowel sound. In the case of "extent", the correct article is "an".
Common error
A common mistake is using the incorrect article ("a" instead of "an") before words that begin with a vowel sound. Ensure you use "an" before "extent" to maintain grammatical correctness: "an extent of" is the standard form.
Source & Trust
83%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "a extent of" functions as a determiner phrase that seeks to specify a particular degree, scope, or range. However, as indicated by Ludwig AI, it is grammatically incorrect and should be "an extent of".
Frequent in
Science
60%
News & Media
30%
Encyclopedias
10%
Less common in
Wiki
0%
Formal & Business
0%
Social Media
0%
Ludwig's WRAP-UP
The phrase "a extent of" is generally considered grammatically incorrect. The correct form is "an extent of", as "extent" begins with a vowel sound. Ludwig AI highlights this error. While the phrase does appear in various sources, it's essential to use the correct article to maintain grammatical accuracy. Alternatives such as "a degree of", "a range of", or "a measure of" can also be considered depending on the context. Remember to prioritize grammatical correctness to ensure clear and professional communication.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
an extent of
Corrects the grammatical error by changing "a" to "an" to agree with the vowel sound of "extent".
a degree of
Replaces "extent" with "degree", offering a more common and grammatically sound alternative to indicate the level or intensity of something.
a range of
Substitutes "extent" with "range", focusing on the breadth or variety encompassed.
a level of
Emphasizes the specific stage or point reached in a scale or process.
a measure of
Highlights the quantifiable aspect of the degree or scope being discussed.
a scope of
Focuses on the area or subject that something covers or deals with.
a quantity of
Highlights the numerical or measurable amount of something.
a proportion of
Indicates the relative amount or ratio of something within a larger whole.
a fraction of
Similar to "proportion", but often implies a smaller or incomplete portion.
a magnitude of
Emphasizes the size or importance of something, especially in a significant or impactful context.
FAQs
What's the correct way to write "a extent of"?
The grammatically correct way is to use "an extent of" because "extent" begins with a vowel sound.
Is "a degree of" the same as "a extent of"?
While similar, "a degree of" implies a level or intensity, while "an extent of" refers to the range or scope. Ensure that you use "an extent of".
When should I use "an extent of" in a sentence?
Use "an extent of" to describe the range, scope, or magnitude of something. For example, "The project will have an extent of influence on the local community."
What are some alternatives to "a extent of" that I can use?
Consider using alternatives like "a range of", "a degree of", or "a measure of" to convey a similar meaning.
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
83%
Authority and reliability
4.1/5
Expert rating
Real-world application tested