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 a fact
Grammar usage guide and real-world examplesAlternative expressions(5)
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
58 human-written examples
I am an outsider to the system, that's a fact.
News & Media
People hate Bush outside the US, that's a fact".
News & Media
Most of that is extensions, that's a fact.
News & Media
They put rattlesnakes into people's mailboxes – that's a fact.
News & Media
The earth's resources are finite; that's a fact, not rhetoric.
Wiki
Now that's a fact.
News & Media
And that's a fact.
News & Media
"That's a fact," he said.
News & Media
"I mean, that's a fact.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
2 human-written examples
"Sea level is rising — that is a fact.
News & Media
Mr. President, that is a fact.
News & Media
Expert writing Tips
Best practice
Use "that's a fact" to confidently affirm a statement, especially in informal or conversational settings. It adds a tone of certainty without being overly formal.
Common error
Avoid using "that's a fact" in formal writing or academic papers where a more objective or data-driven affirmation would be more appropriate. A formal context may require a different tone.
Source & Trust
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "that's a fact" functions as an affirmative statement, confirming the validity or truthfulness of a preceding claim. It acts as a declarative sentence providing validation. Ludwig shows that this affirmation is common across varied contexts.
Frequent in
News & Media
80%
Wiki
10%
Science
5%
Less common in
Formal & Business
3%
Encyclopedias
1%
Reference
1%
Ludwig's WRAP-UP
In summary, "that's a fact" is a common and grammatically correct phrase used to affirm the truthfulness of a statement. Ludwig's examples show its usage in different contexts, primarily in news and media. While suitable for informal conversations, it may be less appropriate in formal writing, where a more objective tone is required. Alternative phrases, like "that is indeed true" or "that is absolutely correct", can be used to express similar affirmation with slightly different nuances.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
that is indeed true
Replaces "that's" with "that is" and adds "indeed" for emphasis.
that is undeniably true
Replaces "that's" with "that is" and adds "undeniably" to strengthen the affirmation.
that is absolutely correct
Uses "absolutely correct" to replace "a fact", conveying strong agreement.
that is the reality
Substitutes "reality" for "fact", offering a slightly more emphatic tone.
that's the truth
Employs "truth" instead of "fact", often used in more informal contexts.
it is a certainty
Replaces the entire phrase with a more formal declaration of certainty.
it cannot be denied
Offers a negative construction to assert the undeniable nature of a statement.
there's no doubt about that
Uses a more conversational tone to express the same sentiment.
it's an established truth
Conveys the idea that something is widely accepted as fact.
that's the case
Offers a shorter, more direct way of confirming a statement's validity.
FAQs
How can I use "that's a fact" in a sentence?
You can use "that's a fact" to emphasize the truthfulness of a statement, such as in, "The Earth is round, "that's a fact"!"
What are some alternatives to saying "that's a fact"?
Alternatives include phrases like "that is indeed true", "that is absolutely correct", or simply "that's the truth".
Is "that's a fact" suitable for formal writing?
While grammatically correct, "that's a fact" is generally more appropriate for informal conversations. Formal writing may require more objective or analytical statements.
What's the difference between saying "that's a fact" and "that is a fact"?
The contraction "that's" versus "that is" introduces a slight difference in formality. "That's a fact" is more casual, while "that is a fact" is slightly more formal, but both convey the same meaning.
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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
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested