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 quote

Justyna Jupowicz-Kozak

CEO of Professional Science Editing for Scientists @ prosciediting.com

MitStanfordHarvardAustralian Nationa UniversityNanyangOxford

I know off

Grammar usage guide and real-world examples

USAGE SUMMARY

The phrase 'I know off' is not correct or usable in written English.
If you want to use the phrase to mean that you have memorized, or have an understanding of, something, you can use the phrase 'I know off by heart.' For example, "I know the phone number off by heart."

⚠ May contain grammatical issues

News & Media

Science

Human-verified examples from authoritative sources

Exact Expressions

4 human-written examples

Parts I know off by heart, yet each time I come away with something different.

This absence of acute biological urgency is compounded by the fact that protein complex formation/concentration does not very often (that I know off) equal phenotype.

Additionally, it's unfortunate to note that in London, this practice seems to be even more prevalent than in the U.S. I know off the top of my head of a few groups that charge, including Envestors, London (in the region of £5,000), London Business Angels (around £1200 plus 5% of capital raised) and the London-based andels Den (£799 and a 5% success fee).

News & Media

TechCrunch

But over the years he heard other stories of specific women who have said they had been assaulted by Morgan: "Three that I know, off the top of my head".

News & Media

Vice

Human-verified similar examples from authoritative sources

Similar Expressions

56 human-written examples

He lays out his credentials just in case I don't know and recounts scenes from his films which I already know off by heart.

I don't know off-hand the first instance of on-stage flight, but it may go back to the French court ballets of the 18th century.

News & Media

The New York Times

I don't know off-hand what kind of numbers we're talking about.

News & Media

BBC

In fact, I know it off by heart, word for word.

News & Media

Huffington Post

"I know the off-season's going to be long," he said.

I usually know off the top.

News & Media

Huffington Post

"No other examiner I know would sign off on it," he said.

News & Media

The New Yorker
Show more...

Expert writing Tips

Best practice

Avoid using the phrase "I know off" in formal writing. Instead, use more grammatically correct alternatives like "I know by heart" or "I am aware of".

Common error

A common mistake is to use "off" instead of "by heart" when referring to memorization. Remember to use "I know it by heart" to correctly convey that you have memorized something.

Antonio Rotolo, PhD - Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Antonio Rotolo, PhD

Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Source & Trust

87%

Authority and reliability

2.8/5

Expert rating

Real-world application tested

Linguistic Context

The phrase "I know off" is grammatically incorrect and typically used in contexts where the speaker intends to express familiarity or memorization. Ludwig AI indicates that it's not a standard English phrase, suggesting alternatives for clarity.

Expression frequency: Rare

Frequent in

News & Media

67%

Science

33%

Formal & Business

0%

Less common in

Academia

0%

Encyclopedias

0%

Wiki

0%

Ludwig's WRAP-UP

The phrase "I know off" is generally considered grammatically incorrect in standard English. As Ludwig AI highlights, the phrase is non-standard and can lead to miscommunication. While some examples appear in news and media, it's advisable to use more accurate and widely accepted alternatives, such as "I know by heart" to express memorization or "I am aware of" to indicate general knowledge. To avoid confusion, stick to grammatically sound phrases in both formal and informal contexts. Because of its grammatical problems, "I know off" is considered a rare phrase.

FAQs

What does "I know off by heart" mean?

The phrase "I know off by heart" means that you have memorized something completely. You can also simply say "I know it by heart".

What can I say instead of "I know off"?

Depending on the context, you can use alternatives like "I am aware of", "I know by heart", or "I understand".

Is "I know of" the same as "I know off"?

No, "I know of" and "I know off" have different meanings. "I know of" means you are aware of something's existence, while "I know off" is generally grammatically incorrect. You may want to use "I know by heart" instead.

How to use "I know by heart" in a sentence?

You can use "I know by heart" to indicate that you have memorized something. For example, "I know the poem by heart" or "I know the phone number by heart".

ChatGPT power + Grammarly precisionChatGPT power + Grammarly precision
ChatGPT + Grammarly

Editing plus AI, all in one place.

Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.

Source & Trust

87%

Authority and reliability

2.8/5

Expert rating

Real-world application tested

Most frequent sentences: