 10 English Phrases For Guessing And Estimating From EspressoEnglish.net 1. Off the top of my head I think it's $200. Off the top of my head means you are making an estimate in that moment without checking the information to make sure it's completely accurate. 2. Knowing him he'll be late Use this phrase to make an educated guess about something that will probably happen based on what you already know about the person, place, or thing. 3. If I had to take a guess I'd say she's $35. Use the phrase I'd say to give your opinion or estimate. 4. It's difficult to say but I think use this phrase to emphasize that the guess is difficult to make accurately. 5. I wouldn't be surprised if Use this phrase to say that something is possible or probable. For example, my sister has been complaining a lot about her job lately. I wouldn't be surprised if she decided to quit soon. 6. I bet Use this phrase when you have more certainty about something happening. For example, I knew all the answers to the English test. I bet I got a good grade. 7. We're talking maybe 40 people The phrase we're talking maybe is an informal way to give a general estimate. 8. It's about 10 miles. It's around 10 miles. The words about and around show that the number is an estimate, not a perfectly exact number. 9. It's somewhere in the ballpark of 1.5 million. This idiomatic expression indicates that the real number is in the same general area as the guess. This phrase is most often used with money. 10. Your guess is as good as mine. This phrase means I have no idea, so any guess is equally likely to be correct or incorrect. Thanks for watching English Tips from Espresso English. If you liked this video, please share it.