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
I'm unsure
Grammar usage guide and real-world examplesTable 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
56 human-written examples
I'm unsure.
News & Media
I'm unsure of my destination.
News & Media
I'm unsure about pretty much everything else.
News & Media
I'm unsure of what to do.
News & Media
I'm unsure if we'll stay up.
News & Media
Right now I'm unsure," he said.
News & Media
With how much success, I'm unsure.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
4 human-written examples
I was unsure how.
News & Media
I am unsure of the outcome.
News & Media
I was unsure whether he knew this.
News & Media
"But I was unsure of how to do it".
News & Media
Expert writing Tips
Best practice
Use "I'm unsure" when expressing a lack of certainty or knowledge about a topic. It's suitable for both formal and informal contexts.
Common error
While "I'm unsure" is perfectly acceptable, overuse can make your writing sound hesitant. Vary your language by using synonyms like "I'm uncertain", "I don't know", or "I'm not sure" for a more engaging style.
Source & Trust
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "I'm unsure" functions as an adjectival phrase expressing a state of uncertainty or lack of definite knowledge. It modifies the subject "I", indicating their current disposition. Examples on Ludwig show its use in various contexts to convey doubt or lack of conviction.
Frequent in
News & Media
83%
Science
9%
Formal & Business
4%
Less common in
Wiki
2%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "I'm unsure" is a very common and grammatically correct phrase used to express uncertainty or a lack of knowledge. Ludwig's examples demonstrate its frequent appearance in news and media, as well as science. While versatile, it's important to avoid overuse and consider synonyms like "I'm not sure" or "I'm uncertain". The neutral register makes it suitable for both formal and informal contexts.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
I am uncertain
Formal variation using "uncertain" instead of "unsure".
I'm not sure
Common alternative conveying the same meaning with a different word choice.
I'm doubtful
Emphasizes doubt rather than just a lack of certainty.
I'm hesitant
Highlights reluctance or reservation due to uncertainty.
I'm unclear
Focuses on a lack of clarity or understanding.
I don't know
A more direct and general expression of lack of knowledge.
I have my doubts
Expresses skepticism or disbelief.
I'm of two minds
Indicates indecision between two options.
I'm on the fence
Similar to "of two minds", suggesting indecision.
I'm in a quandary
Implies a perplexing or difficult situation leading to uncertainty.
FAQs
What does "I'm unsure" mean?
"I'm unsure" means that you lack certainty or knowledge about something. It is a common way to express doubt or uncertainty.
How can I use "I'm unsure" in a sentence?
You can use "I'm unsure" to express uncertainty about a fact, a decision, or a future event. For example, "I'm unsure whether to accept the job offer" or "I'm unsure of the exact time of the meeting".
What can I say instead of "I'm unsure"?
You can use alternatives like "I'm not sure", "I'm uncertain", or "I don't know" depending on the context.
Is "I am unsure" more formal than "I'm unsure"?
Yes, "I am unsure" is slightly more formal than "I'm unsure" because it uses the full form of the verb "to be". However, both are generally acceptable in most contexts.
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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
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested