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
that is interesting
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "that is interesting" is correct and usable in written English.
You can use it to express curiosity or intrigue about a statement or topic that has been presented. Example: "I just learned about the history of the ancient civilization, and I must say, that is interesting."
✓ Grammatically correct
News & Media
Wiki
Academia
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
60 human-written examples
"It's the game that is interesting".
News & Media
"Hmm, that is interesting," Young noted.
News & Media
But it's what happened to another group that is interesting.
News & Media
It's what the old rogue DOES that is interesting.
News & Media
Pen gwyn means white head.' 'Well that is interesting.
News & Media
It's certainly a specific concentration, but one that is interesting, challenging, and exciting.
Academia
Ahmet said, "There is a certain sort of excess that is interesting, don't you think?
News & Media
This all raises a matter that is interesting to many of us who travel.
News & Media
I'll read People magazine — something that is interesting but not wildly intellectually challenging.
News & Media
"One of the things that is interesting is how quickly play can mutate," Dodds says.
News & Media
"One of the families that is interesting," she says, "is the Shah family, Manoj and Celia.
News & Media
Expert writing Tips
Best practice
Employ "that is interesting" to transition into a related point or question, maintaining the flow of the discussion.
Common error
Avoid simply stating "that is interesting" without providing context or explaining why you find it interesting. Adding a brief explanation demonstrates genuine engagement and encourages further discussion.
Source & Trust
82%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "that is interesting" primarily functions as an interjection or a comment expressing mild interest, surprise, or curiosity. Ludwig AI analysis of numerous examples confirms its role in acknowledging information and prompting further discussion.
Frequent in
News & Media
48%
Wiki
23%
Academia
11%
Less common in
Science
9%
Formal & Business
0%
Social Media
0%
Ludwig's WRAP-UP
In summary, "that is interesting" is a versatile phrase used to express mild interest, curiosity, or agreement. Ludwig AI analysis confirms its grammatical correctness and wide usage across diverse sources, including news, wikis, and academia. While it's a neutral and acceptable phrase, remember to add context or elaboration to demonstrate genuine engagement and prevent overuse. Consider alternatives like ""that is fascinating"" or ""that is intriguing"" to add nuance to your expression. Avoid overusing it without explaining the reason behind your interest. With an expert rating of 4.5, this phrase is a reliable choice for expressing mild curiosity and engaging in conversation.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
that's fascinating
Changes the adjective to emphasize the captivating nature of the subject.
that's intriguing
Replaces "interesting" with a word highlighting the mysterious or puzzling quality.
that's noteworthy
Shifts the focus to the importance or significance of the subject.
that's remarkable
Emphasizes the exceptional or unusual nature of the subject.
that's compelling
Highlights the persuasive or attention-grabbing aspect of the subject.
that's thought-provoking
Focuses on the subject's ability to stimulate deeper thinking.
that's quite a discovery
Expresses surprise and appreciation for new information.
that's news to me
Indicates surprise or unfamiliarity with the information.
that's something to consider
Highlights the subject's importance for future reflection or action.
I find that compelling
Expresses personal interest and highlights the persuasive quality of the subject.
FAQs
How can I use "that is interesting" in a sentence?
You can use "that is interesting" to express mild surprise, curiosity, or agreement with something someone has said. For example, "I didn't know that penguins are a Welsh word, well, "that is interesting"!"
What are some alternatives to saying "that is interesting"?
Depending on the context, you could use alternatives like "that is fascinating", "that is intriguing", or "that is noteworthy".
Is it correct to say "that's interesting" instead of "that is interesting"?
Yes, "that's interesting" is a common contraction of "that is interesting" and is perfectly acceptable in most informal contexts.
When should I use "that is interesting" versus "this is interesting"?
"That is interesting" typically refers to something someone else has said or a fact you've just learned. "This is interesting" usually refers to something you are currently experiencing or observing.
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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
82%
Authority and reliability
4.5/5
Expert rating
Real-world application tested