I was thinking vs I was wondering

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

I was thinking

Top 2,000 (common)

I was wondering

Top 2,000 (common)
 I was thinkingI was wondering
Pronunciation🇬🇧 //aɪ wəz ˈθɪŋkɪŋ//🇺🇸 //aɪ wəz ˈθɪŋkɪŋ//🇬🇧 //aɪ wəz ˈwʌndərɪŋ//🇺🇸 //aɪ wəz ˈwʌndərɪŋ//
MeaningThis means you were considering or pondering something.I was thinking about something or curious about it.
ExampleI was thinking about going to the park this afternoon.I was wondering if you could help me with this project.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 2,000 (common)
Collocationsthinking about, thinking of, was thinking, thinking back, thinking aheadI was wondering if, I was wondering about, I was wondering whether, I was wondering what, I was wondering why
Common mistakesUsing it without a following object, e.g., 'I was thinking about.', Confusing it with 'I think' for current thoughts.Using 'I was wondering' instead of 'I wonder' in direct questions., Confusing the meaning of 'wondering' with 'worrying'., Omitting the intended subject or object in more complex sentences.
Usage notesCommonly used to express contemplation. Can be informal in casual conversations, but acceptable in most contexts.Commonly used to introduce a question or inquiry. Suitable for informal and formal contexts but less so for highly casual situations.

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I was thinking
I was wondering

Frequently asked questions: I was thinking vs I was wondering

What's the difference between I was thinking and I was wondering?

I was thinking: This means you were considering or pondering something. I was wondering: I was thinking about something or curious about it.

Can you show an example of each?

I was thinking: I was thinking about going to the park this afternoon. I was wondering: I was wondering if you could help me with this project.

Can I use I was thinking and I was wondering interchangeably?

Not always. I was thinking and I was wondering 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.