Introduction
Saying “I’m not really sure” is common in everyday English. We use it when we feel uncertain, confused, or hesitant. However, repeating the same phrase can make your speech sound limited. Learning different ways to express uncertainty helps you sound more natural, confident, and fluent—especially in professional or academic settings.
In this guide, you will learn 10 other ways to say “I’m not really sure,” along with clear explanations and practical examples. These alternatives will help you communicate more precisely and politely in different situations.
10 Other Ways to Say “I’m Not Really Sure”
1. I’m not certain.
This is a slightly more formal option. It works well in professional or academic conversations.
“I’m not certain about the meeting time. Let me check the schedule.”
2. I’m not completely sure.
This phrase suggests partial knowledge. You may have some idea, but not full confidence.
“I’m not completely sure, but I think the store closes at 8 p.m.”
3. I’m not positive.
Use this when you believe something might be true, but you don’t want to guarantee it.
“I’m not positive, but I believe she moved to Canada.”
4. I’m unsure.
This is short and slightly formal. It is common in emails and professional discussions.
“I’m unsure whether the report has been submitted.”
5. I’m not too sure about that.
This phrase is more conversational. It can also gently show doubt about someone else’s idea.
“I’m not too sure about that plan. Maybe we should review the budget again.”
6. I’m not convinced.
Use this when you doubt an argument or explanation. It shows skepticism rather than simple uncertainty.
“I’m not convinced this solution will fix the problem.”
7. I’m still figuring it out.
This phrase shows that you are actively thinking or learning. It sounds positive and honest.
“I’m still figuring it out, but I’ll let you know once I have an answer.”
8. That’s a good question.
This is useful when you need time to think. It sounds thoughtful and polite.
“That’s a good question. I’ll need to look into it.”
9. I don’t have a clear answer yet.
This phrase works well in formal or business situations. It shows responsibility.
“I don’t have a clear answer yet, but I’m working on it.”
10. I can’t say for sure.
This expression is common in both casual and formal speech. It suggests uncertainty without sounding weak.
“I can’t say for sure, but traffic might be heavy this evening.”
Comparison Table
| Phrase | Level of Formality | Best Used In |
|---|---|---|
| I’m not certain | Formal | Business, academic settings |
| I’m not completely sure | Neutral | General conversation |
| I’m not positive | Neutral | Casual and semi-formal situations |
| I’m unsure | Formal | Emails, professional talks |
| I’m not too sure about that | Casual | Friendly discussions |
| I’m not convinced | Neutral | Debates, decision-making |
| I’m still figuring it out | Casual | Learning situations |
| I can’t say for sure | Neutral | Everyday use |
How to Choose the Right Phrase
Not all expressions of uncertainty are the same. Some are softer, while others show doubt or disagreement. Here are a few tips:
- For professional settings: Use phrases like “I’m not certain,” “I’m unsure,” or “I don’t have a clear answer yet.”
- For casual conversations: Try “I’m not too sure” or “I can’t say for sure.”
- When disagreeing politely: Use “I’m not convinced” or “I’m not too sure about that.”
- When buying time: Say “That’s a good question” or “I’m still figuring it out.”
Choosing the right phrase depends on your tone, your relationship with the listener, and the situation.
Practical Dialogue Examples
Here are a few short dialogues to show how these phrases work in real conversations:
Manager: “Will the project be finished by Friday?”
Employee: “I’m not certain. We’re waiting for the final data.”
Friend: “Is this the right bus?”
You: “I can’t say for sure. Let’s ask the driver.”
Teacher: “Do you understand the lesson?”
Student: “I’m still figuring it out.”
Colleague: “Do you agree with this strategy?”
You: “I’m not convinced. We might need more research.”
Quick Summary
- Using different phrases for “I’m not really sure” improves your vocabulary.
- Some expressions are formal, while others are casual.
- Choose polite and professional phrases in workplace settings.
- Use softer expressions when you want to disagree gently.
- Practice these phrases in real conversations to sound more natural.
Conclusion
Expressing uncertainty is a normal and important part of communication. Instead of always saying “I’m not really sure,” you can choose from many alternatives that better match your situation and tone. Whether you are speaking in a meeting, writing an email, or chatting with friends, these phrases will help you communicate clearly and confidently.
With practice, you’ll be able to express doubt or hesitation in a way that sounds natural, polite, and fluent.