Polite Ways to Say ‘I am not sure’

When you need to express uncertainty in English, saying “I am not sure” is perfectly clear, but it can sometimes sound too direct or even dismissive. This guide gives you polite, natural alternatives that work in everyday conversation, professional emails, and workplace discussions. You will learn phrases that soften your uncertainty while still sounding confident and helpful.

Quick Answer: Best Polite Alternatives

If you need a polite way to say “I am not sure” right now, here are your best options:

• “I’m not entirely sure, but I think…” – Good for conversations when you want to give a tentative opinion.
• “I’d need to check on that.” – Perfect for workplace and email situations.
• “I’m afraid I can’t say for certain.” – A formal and very polite option.
• “Let me look into that for you.” – Shows willingness to help despite uncertainty.
• “That’s a good question. I want to be sure before I answer.” – Buys time while sounding thoughtful.

Polite Alternatives for Everyday Conversation

In casual or friendly settings, you want to sound natural without being too stiff. These phrases help you express uncertainty politely without over-explaining.

1. “I’m not entirely sure, but…”

This phrase is a gentle way to introduce an opinion or guess. The word “entirely” softens the uncertainty, making it sound like you have some knowledge but not complete confidence.

When to use it: When a friend asks for your opinion on a movie, restaurant, or plan.

Natural examples:

• “I’m not entirely sure, but I think the meeting starts at 3 PM.”
• “I’m not entirely sure what time the store closes, but I can check online.”
• “I’m not entirely sure if she likes sushi, but I remember she ordered it once.”

2. “I couldn’t say for sure.”

This phrase is slightly more formal than “I’m not sure” but still works in everyday conversation. It implies that you don’t have enough information to give a definite answer.

When to use it: When a colleague or acquaintance asks about something you genuinely don’t know.

Natural examples:

• “I couldn’t say for sure whether the train is on time.”
• “I couldn’t say for sure who will be at the party tonight.”
• “I couldn’t say for sure if that’s the right address.”

3. “I’m not 100% sure, but I believe…”

Using a percentage makes your uncertainty sound precise and honest. It is friendly and approachable.

When to use it: When you want to give an answer but also want to leave room for correction.

Natural examples:

• “I’m not 100% sure, but I believe the package arrives tomorrow.”
• “I’m not 100% sure, but I believe she works in marketing.”
• “I’m not 100% sure, but I believe we have a reservation at 7.”

Polite Alternatives for Professional Emails

In written communication, you need to sound helpful and competent even when you are uncertain. These phrases maintain professionalism while being honest about your lack of certainty.

1. “I’d need to verify that before I can confirm.”

This phrase shows that you take accuracy seriously. It is excellent for customer service or internal communication.

When to use it: When someone asks for specific data, deadlines, or facts you don’t have at hand.

Natural examples:

• “I’d need to verify that before I can confirm the shipping date.”
• “I’d need to verify that with the finance team before I give you an answer.”
• “I’d need to verify the exact figures before I send the report.”

2. “Let me double-check and get back to you.”

This is a very common and polite email phrase. It promises action, not just uncertainty.

When to use it: When you want to sound proactive and helpful.

Natural examples:

• “Let me double-check and get back to you about the deadline.”
• “Let me double-check the inventory and confirm availability.”
• “Let me double-check with the team and I’ll reply shortly.”

3. “I’m not in a position to confirm that at the moment.”

This is a formal and careful phrase. It is useful when you lack authority or information.

When to use it: In formal emails to clients, senior management, or external partners.

Natural examples:

• “I’m not in a position to confirm that at the moment, but I will update you as soon as I know.”
• “I’m not in a position to confirm the budget details right now.”
• “I’m not in a position to confirm the policy change until I receive official notice.”

Polite Alternatives for Workplace Speaking

In meetings, one-on-one conversations, or team discussions, you want to sound collaborative and honest. These phrases help you express uncertainty without losing credibility.

1. “That’s a good point. Let me think about it.”

This phrase acknowledges the other person’s question and gives you a moment to consider. It sounds respectful and engaged.

When to use it: When someone asks a difficult question in a meeting.

Natural examples:

• “That’s a good point. Let me think about it before I give you an answer.”
• “That’s a good point. Let me think about how that affects the timeline.”
• “That’s a good point. Let me think about it and I’ll get back to you.”

2. “I want to be careful with my answer.”

This phrase shows that you take the question seriously and don’t want to give incorrect information.

When to use it: When the question involves sensitive information or important decisions.

Natural examples:

• “I want to be careful with my answer because this involves client data.”
• “I want to be careful with my answer, so let me check the latest report.”
• “I want to be careful with my answer because I don’t want to mislead you.”

3. “I don’t have that information right now, but I can find out.”

This is direct but polite. It admits uncertainty while immediately offering a solution.

When to use it: When you clearly do not know the answer but can get it.

Natural examples:

• “I don’t have that information right now, but I can find out from the logistics team.”
• “I don’t have that information right now, but I can check the system.”
• “I don’t have that information right now, but I can ask the project lead.”

Comparison Table: Formal vs. Casual

Common Mistakes to Avoid

Mistake 1: Using “I’m not sure” without any softening

Incorrect: “I’m not sure. Ask someone else.”
Why it’s a problem: This sounds dismissive and unhelpful.
Better: “I’m not sure about that, but I can help you find the answer.”

Mistake 2: Over-apologizing

Incorrect: “I’m so sorry, I really don’t know, I’m terrible with dates.”
Why it’s a problem: It sounds insecure and unprofessional.
Better: “I’m not sure about the exact date. Let me check my calendar.”

Mistake 3: Using “maybe” too often

Incorrect: “Maybe it’s on Tuesday? Maybe not? I’m not sure.”
Why it’s a problem: It sounds vague and indecisive.
Better: “I’m not entirely sure, but I think it might be Tuesday. Let me confirm.”

Mistake 4: Saying “I don’t know” without offering help

Incorrect: “I don’t know.” (and then silence)
Why it’s a problem: It ends the conversation without a solution.
Better: “I don’t know off the top of my head, but I can look it up for you.”

Better Alternatives for Specific Situations

When you need to buy time

• “Let me take a moment to think about that.”
• “I want to give you an accurate answer, so give me a second.”
• “That’s a great question. I need a moment to recall the details.”

When you are unsure about facts

• “I’m not certain about that statistic. Let me check the source.”
• “I can’t confirm that off the top of my head.”
• “I’d rather not guess. Let me find the correct information.”

When you are unsure about someone’s feelings or opinion

• “I’m not sure how they feel about it. Maybe we should ask.”
• “I can’t speak for them, but I can check.”
• “I’m not sure what their preference is. Let me ask.”

Mini Practice Section

Test your understanding with these four questions. Choose the most polite and natural option.

Question 1: A colleague asks you when the report is due. You don’t remember exactly. What do you say?

A) “I’m not sure. Ask the manager.”
B) “I’m not entirely sure, but I think it’s Friday. Let me confirm.”
C) “I don’t know.”

Answer: B. It is polite, offers a tentative answer, and promises to confirm.

Question 2: You are in a meeting and someone asks a difficult question about the budget. What do you say?

A) “I have no idea.”
B) “That’s a good point. Let me think about it and get back to you.”
C) “Maybe? I’m not sure.”

Answer: B. It shows respect for the question and gives you time to prepare a proper answer.

Question 3: You are writing an email to a client who asks about delivery dates. You need to check first. What do you write?

A) “I don’t know the delivery date.”
B) “Let me double-check and get back to you with the exact date.”
C) “I’m not sure about that.”

Answer: B. It is professional, polite, and promises action.

Question 4: A friend asks if you are free next Saturday. You are not sure about your plans. What do you say?

A) “I’m not 100% sure, but I think I’m free. Let me check my calendar.”
B) “I don’t know.”
C) “Maybe.”

Answer: A. It is honest, polite, and gives a tentative answer while promising to confirm.

Frequently Asked Questions

1. Is it rude to say “I’m not sure” in a professional email?

No, it is not rude, but it can sound a bit blunt. Using a longer phrase like “I’d need to verify that before I can confirm” sounds more professional and shows that you care about accuracy.

2. Can I use these phrases in a job interview?

Yes, but be careful. In an interview, it is better to say something like “That’s a great question. I want to give you a thoughtful answer, so let me take a moment.” This shows confidence and honesty.

3. What is the most polite way to say “I don’t know” to a customer?

The most polite way is to immediately offer a solution. For example: “I don’t have that information right now, but I can find out for you. Let me check with my team.” This keeps the customer happy.

4. How do I say “I’m not sure” without sounding weak?

Focus on action. Instead of just saying you are unsure, add what you will do next. For example: “I’m not sure about the exact timeline, but I will confirm it by the end of the day.” This shows responsibility.

Final Tips

When you feel uncertain, remember these three rules:

• Be honest but helpful. Admit you don’t know, but always offer to find out.
• Use softening words. Words like “entirely,” “quite,” and “100%” make your uncertainty sound polite.
• Offer a next step. The best polite phrases always include what you will do next, like “let me check” or “I’ll get back to you.”

For more polite everyday phrases, explore our Polite Everyday Phrases category. If you need help with workplace communication, visit our Workplace Speaking Phrases section. For questions about our content, please see our FAQ or contact us.