until when

USAGE SUMMARY

"until when" is correct and usable in written English.
You can use it to ask a question about a period of time that is continuing or will continue up until a certain point. For example: "How long are you staying in town until when?".

✓ Grammatically correct

News & Media

Science

Formal & Business

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

O Lord, until when?

The New York Times

She grew up comfortably in Little Rock until, when she was ten, her father died.

The New Yorker

Wait until when?" Then an unseen announcer concludes: "The world needs American strength, not apologies".

The New York Times

Others could defer it until when the property was sold or they died.

Independent

"I'm staying with my sister until, well, I don't know until when," she said.

The New York Times

It's not just from when you show up at the ballpark until when you leave.

The New York Times

Or at least I did up until when my mum died.

The Guardian - Music

Until when would killing and destruction... be our share, while security, stability and happiness are yours?

The New York Times

That went for playing when I was 17 until when I was 40.

The Guardian - Sport

"At one of the protests outside the press club I heard the slogan 'Until when?

The Guardian

We are really tense, even the shops have now closed… after all, until when will they run on inverters [batteries]?

The New York Times

Expert writing Tips

Best practice

Use "until when" to inquire about the termination point of an event, activity, or state. Ensure the context is clear to avoid ambiguity.

Common error

Avoid using "until when" when a simple "when" will suffice. "Until when" implies a duration leading up to a point, not just a single point in time.

Linguistic Context

The phrase "until when" functions as an interrogative phrase, typically used within a question. It seeks to determine the concluding point or duration of a specific action, event, or state. Ludwig indicates this usage is grammatically sound and frequent.

Expression frequency: Very common

Frequent in

News & Media

37%

Science

33%

Wiki

13%

Less common in

Formal & Business

8%

Huffington Post

5%

Vice

4%

Ludwig's WRAP-UP

In summary, the phrase "until when" is a grammatically correct and frequently used interrogative phrase that serves to inquire about the duration or end point of an event, action, or state. Ludwig confirms its validity and common use across various contexts. While versatile, it's best used when clarity about a concluding duration is needed, and it can be replaced with alternative phrases like "how long will this last" depending on the desired emphasis. The phrase appears frequently in News & Media, Science, and Wiki, indicating its acceptance in both formal and informal writing.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

until what time

This alternative focuses on a specific time as the endpoint.

how long will this last

This alternative rephrases the question focusing on the duration of an event.

till what moment

This alternative is slightly more formal, emphasizing a specific moment.

how much longer

This shortens the question, asking about the remaining time.

up to what point

This emphasizes the limit or boundary of a time period.

for what duration

This is a more formal way of asking about the length of time.

how much time remains

This focuses on the quantity of time left.

what is the deadline

This alternative specifically refers to the final time or date for something.

before it ends

This alternative implies a question of anticipation about something coming to an end.

what's the expiry date

This alternative focuses on a specific date when something is no longer valid.

FAQs

How do I use "until when" in a sentence?

Use "until when" to ask about the duration of an event or action. For example, "How long are you staying with your sister "until when" will you be there?".

What can I say instead of "until when"?

You can use alternatives like "how long will this last", "how much longer", or "until what time depending on the context.

Which is correct, "until when" or "how long"?

"Until when" is used to inquire about the end point of a duration, while "how long" asks about the length of the duration itself. Depending on the context, both can be correct.

What's the difference between "until when" and "when"?

"When" refers to a specific point in time. "Until when" refers to a duration leading up to a point in time. For instance, "When does the movie start?" versus "Until when does the promotion last?".