which is why

USAGE SUMMARY

The phrase "which is why" is correct and usable in written English.
You can use this phrase to explain why something is the case or why an action has been taken. For example, "I'm tired after my long day at work, which is why I'm going to bed early tonight."

✓ Grammatically correct

News & Media

Academia

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

Which is why they're cool".

Independent

Which is why we bother watching.

The New York Times - Sports

Which is why Obamacare is profoundly unamerican.

The Economist

Which is why I started meditating.

The New York Times

Which is why investors are so nervous.

The Economist

Which is why we like it.

Independent

Which is why they relish weekends.

The New York Times

Which is why I should stay in.

The New Yorker

Which is why I love bakeries.

The New York Times

Which is why "Cut!

The New York Times

Which is why it works".

The Guardian - TV & Radio

Expert writing Tips

Best practice

Use "which is why" to clearly connect a cause or reason to its resulting effect. It is most effective when the relationship between the two is not immediately obvious to the reader.

Common error

While "which is why" is grammatically correct, overuse can make writing sound repetitive or informal. In formal contexts, consider using alternatives like "therefore" or "consequently" to maintain a professional tone.

Linguistic Context

The phrase "which is why" functions as a causal connector, linking a preceding statement to its consequence or explanation. It introduces the reason or cause behind a particular situation, action, or outcome. As Ludwig AI confirms, it is a correct and usable phrase.

Expression frequency: Very common

Frequent in

News & Media

69%

Academia

12%

Formal & Business

4%

Less common in

Science

15%

Encyclopedias

0%

Wiki

0%

Ludwig's WRAP-UP

In summary, "which is why" is a versatile phrase used to establish a causal relationship between ideas, providing an explanation or justification for a statement. As confirmed by Ludwig AI, it is grammatically correct and widely used, particularly in news and media contexts. While suitable for various registers, it's important to be mindful of overuse, especially in formal writing, where alternatives like "therefore" or "consequently" might be more appropriate. By understanding its function and purpose, you can effectively integrate "which is why" into your writing to enhance clarity and coherence.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

that's why

This is a more direct and informal way to express the reason for something.

as a result

This phrase highlights the outcome or consequence of a preceding event.

this is the reason why

This alternative is a more emphatic and explanatory way of stating the cause.

that explains why

This offers a more explanatory and insightful connection between cause and effect.

therefore

This alternative provides a more formal and concise causal link.

for this reason

It offers a slightly more formal tone for introducing an explanation.

consequently

This option emphasizes the result or outcome of a preceding action or situation.

thus

This presents a logical conclusion based on the previous statement.

hence

This is a more formal and somewhat archaic way to indicate a logical consequence.

this accounts for

This alternative introduces the cause or explanation of something.

FAQs

How can I use "which is why" in a sentence?

You can use "which is why" to connect a cause and its effect in a sentence. For example, "The weather was terrible, "which is why" we stayed inside."

What's a more formal alternative to "which is why"?

Alternatives like "therefore", "consequently", or "as a result" are more formal and suitable for academic or professional writing.

Is it ever incorrect to use "which is why"?

While grammatically correct, overusing "which is why" can make your writing sound repetitive. Try to vary your sentence structure by using synonyms like "that's why" or "for this reason".

What is the difference between "which is why" and "that's why"?

"Which is why" is slightly more formal than "that's why". Both phrases connect a cause and its effect, but "which is why" is often preferred in more structured or academic writing.