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 explains why
Grammar usage guide and real-world examplesUSAGE SUMMARY
The part of the sentence 'that explains why' is correct and can be used in written English.
You can use it when you want to explain the reason for something. For example: I decided to take the bus, that explains why I was late.
✓ Grammatically correct
News & Media
Science
Alternative expressions(20)
that is why
this explains why
that accounts for
that is the explanation for
that clarifies the reason
this sheds light on why
is equivalent to
in the wishes of
rapidly thereafter
for the immediate future
Very soon
somewhere later
one week before
at the early time
in the next weeks
during the previous years
it is important to remember
to avoid disruption
not yet completed
in accordance with direction from
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
Over half the time, even lung samples grow out nothing that explains why a patient died.
News & Media
So it is low fertility that explains why Europe's population is ageing faster than America's.
News & Media
At least that explains why I don't win more often.
News & Media
And it is politics that explains why this spending review is so minimalistic.
News & Media
This is the part that explains why I'm so proud.
News & Media
Here is a chart that explains why this is important.
News & Media
quinquefasciatus males [ 45], a pattern that explains why Cx. p. pipiens and Cx.
Science
That explains why bubbles can form.
News & Media
"That explains why she doesn't fit in.
News & Media
Perhaps that explains why I'm still single.
News & Media
That explains why he's always late home.
News & Media
Expert writing Tips
Best practice
Ensure the statement following "that explains why" directly and logically results from the preceding information.
Common error
Avoid using "that explains why" without a clear preceding statement or context. Ensure the reader understands what 'that' refers to.
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "that explains why" functions as a causal connector, linking a previous statement to its explanation. As Ludwig AI explains, it's a correct way to introduce a reason. Examples illustrate its use across different domains.
Frequent in
News & Media
65%
Science
20%
Formal & Business
5%
Less common in
Wiki
5%
Encyclopedias
3%
Reference
2%
Ludwig's WRAP-UP
In summary, the phrase "that explains why" is a grammatically correct and very common causal connector used to provide a reason or explanation for a preceding statement. Ludwig AI confirms its correct usage, and its frequency in news and media sources highlights its importance in clear communication. While generally neutral in register, it can be adapted to various contexts, ensuring a logical link between cause and effect. Remember to use it with clear antecedents and in situations where the explanation is not already self-evident.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
that is the explanation for
Rephrases to 'that is the explanation for', providing a more direct explanation.
that clarifies the reason
Replaces 'explains' with 'clarifies', emphasizing the clarification aspect.
that provides the rationale
Substitutes 'explains' with 'provides the rationale', emphasizing a reasoned justification.
that elucidates the cause
Uses 'elucidates' and 'cause', adding a formal tone and focusing on the cause.
this sheds light on why
Uses 'sheds light on', suggesting a revealing of information.
that illuminates the basis
Employs 'illuminates' and 'basis', suggesting a deeper understanding.
that accounts for the fact that
Replaces "explains why" with "accounts for the fact that", which introduces a fact following the explanation.
this clarifies the rationale
Switches to 'this' and uses 'rationale', indicating a more formal or reasoned explanation.
that justifies the reason
Switches to 'justifies the reason', suggesting a validation or defense of the reason.
hence, the reason is clear
Uses 'hence' to introduce a logical conclusion, making the reason apparent.
FAQs
How can I use "that explains why" in a sentence?
Use "that explains why" to introduce the reason for something mentioned previously. For example: 'The store was closed; "that explains why" there were no customers'.
What are some alternatives to "that explains why"?
Alternatives include "that is why", "this explains why", or "that accounts for". The best choice depends on the specific context.
Is it ever incorrect to use "that explains why"?
While grammatically correct, "that explains why" can be redundant if the cause-and-effect relationship is already clear. Opt for a more concise expression in such cases.
What's the difference between "that explains why" and "that's why"?
"That explains why" explicitly points to a reason, whereas "that's why" is a more general way of introducing a consequence or result. They are often interchangeable, but "that explains why" is more emphatic in its causal link.
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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
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested