What was it vs What was that

When to use each in English, with meaning, register, and examples.

What was it

Top 2,000 (common)

What was that

Top 2,000 (common)
 What was itWhat was that
Pronunciation🇬🇧 //wɒt wəz ɪt//🇺🇸 //wɑt wəz ɪt//🇬🇧 //wɒt wəz ðæt//🇺🇸 //wɑt wəz ðæt//
MeaningA question asking for information about something mentioned earlier.A question asking for clarification about something that happened.
ExampleI heard a loud noise. What was it?Did you hear that? What was that?
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 2,000 (common)
CollocationsWhat was it about, What was it like, What was it forwhat was that noise, what was that sound, what was that about
Antonyms-I understand, That is clear
Common mistakesOmitting context can lead to confusion., Confusing with 'What is it' which asks for current information., Using it improperly in formal contexts.Confused with 'what is that?' which asks about something present., Used in formal situations where clarity is important., Overused in conversations, when direct questions could suffice.
Usage notesUsed in casual conversations to inquire about a previous topic. Can be unclear if not enough context is provided.Use when you need to clarify something you didn't hear or understand. Avoid in formal presentations.

See it in real clips

What was it
What was that

Frequently asked questions: What was it vs What was that

What's the difference between What was it and What was that?

What was it: A question asking for information about something mentioned earlier. What was that: A question asking for clarification about something that happened.

Can you show an example of each?

What was it: I heard a loud noise. What was it? What was that: Did you hear that? What was that?

Can I use What was it and What was that interchangeably?

Not always. What was it and What was that are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

Related comparisons