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's it
Grammar usage guide and real-world examplesUSAGE SUMMARY
"that's it" is a correct and usable sentence in written English.
You can use it to indicate that you have nothing more to say or add to a discussion. For example: "I don't know any other solutions to the problem; that's it."
✓ Grammatically correct
News & Media
Science
Alternative expressions(20)
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
56 human-written examples
Yeah, that's it.
News & Media
"Voilà, that's it.
News & Media
"Saving, that's it.
News & Media
Sofia Vergara, that's it.
News & Media
P16 No? So that's it.
Science
You turn six, that's it.
Science
"Yep, that's it".
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
4 human-written examples
Yes, that was it.
News & Media
Yep, that was it.
News & Media
Well that is it.
News & Media
That generation, that was it.
News & Media
Expert writing Tips
Best practice
When using "that's it" to indicate agreement or sudden realization, ensure the context makes your intent clear to avoid ambiguity.
Common error
Avoid relying too heavily on "that's it" in formal or academic writing. While acceptable in conversational contexts, it can come across as too informal. Opt for more precise and descriptive language to convey finality or confirmation.
Source & Trust
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "that's it" primarily functions as an interjection or a short declarative phrase. It indicates completion, agreement, or sudden realization. Ludwig AI confirms its grammatical correctness. Examples from Ludwig show its use in signaling the end of a task or confirming understanding.
Frequent in
News & Media
60%
Science
20%
Formal & Business
10%
Less common in
Academia
5%
Reference
3%
Wiki
2%
Ludwig's WRAP-UP
In summary, "that's it" is a grammatically correct and frequently used phrase with diverse applications. According to Ludwig AI, it commonly signals completion, agreement, or sudden understanding. While versatile, it's best suited for neutral to informal contexts. For formal writing, consider using more precise alternatives like "that is all" or "the end". Be mindful of overusing it in formal settings to maintain a professional tone. Ludwig's examples highlight its prevalence in news and media, suggesting its accessibility and widespread usage.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
that is all
Expresses the end of a statement or action, similar to "that's it", but slightly more formal.
that's the end
Indicates the conclusion of something, focusing on the termination of an event or process.
it is finished
Conveys a sense of completion, often with a stronger emphasis on accomplishment or finality.
end of story
Signals that a discussion or explanation is complete, leaving no room for further debate.
case closed
Implies that a matter has been resolved and requires no further attention or investigation.
period
Emphasizes the finality of a statement, often used to shut down further discussion.
full stop
Similar to "period", used to indicate that there is nothing more to add or consider.
that settles it
Suggests that a decision has been made and is not open to change or reconsideration.
there you have it
Presents a final result or conclusion, often after a process or explanation.
bingo
Expresses sudden realization or confirmation of something, similar to one usage of "that's it".
FAQs
How can I use "that's it" in a sentence?
"That's it" can be used to signal the end of something, like "That's it, I'm done with this project", or to express agreement or understanding, like "Oh, "that's it"! Now I understand".
What phrases are similar to "that's it"?
Similar phrases include "that is all", "the end", or "bingo", depending on the context.
Is "that's it" appropriate for formal writing?
While grammatically correct, "that's it" is generally considered informal. Use more precise and descriptive language in formal contexts.
What does "that's it" mean when someone says it?
The meaning of "that's it" depends on the context. It can mean "that's the end", "that's all", or indicate sudden understanding or agreement.
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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
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested