"e.g." = for example (you could list more); "i.e." = that is (you are defining or clarifying exactly).
From Latin "exempli gratia" = for the sake of example. Introduces one or more examples from a larger group. After e.g., there are always more options not listed.
Some programming languages, e.g., Python, JavaScript, and Go, are widely used for web development.
She enjoys outdoor activities, e.g., hiking, cycling, and kayaking.
You should eat more protein-rich foods, e.g., eggs, chicken, and legumes.
From Latin "id est" = that is. Restates, clarifies, or gives the only correct answer. What follows is complete and exact, not partial.
The meeting will be held in the main conference room, i.e., the one on the third floor.
He chose the most affordable option, i.e., the basic subscription plan.
The event is open to all current members, i.e., anyone who renewed their membership this year.
Common mistake
Using "i.e." when giving examples and "e.g." when defining precisely. The test: if you can add "and others" after your list, it is e.g. If what you write IS the exact, complete definition, it is i.e. Both are followed by a comma in American English: "e.g.," / "i.e.,".
Trick to remember it
e.g. = "example given". i.e. = "in essence" or "in explanation". Visual trick: "e.g." has E for Examples. "i.e." has I for "In other words" or "that Is". Quick swap: replace with "for example" — if it fits, use e.g. Replace with "that is" or "in other words" — if it fits, use i.e.
Quick rule
e.g. = for example (partial list, more exist). i.e. = that is (exact, complete definition).
Did you know?
Both abbreviations come from Latin. "e.g." is "exempli gratia" and "i.e." is "id est". In formal written English they are italicized. In technical and academic documents they are ubiquitous, but many modern style guides (such as the AP Style Guide) recommend writing out "for example" and "that is" instead of the Latin abbreviations for clarity.
Exercise 1 · Pick the right one
The course covers several topics, _____, grammar, vocabulary, and pronunciation.
Exercise 2 · Pick the right one
She only drinks one type of coffee, _____, black espresso with no sugar.
Exercise 3 · Form the word
e.g. = for example (partial list, more exist). i.e. = that is (exact, complete definition).
Using "i.e." when giving examples and "e.g." when defining precisely. The test: if you can add "and others" after your list, it is e.g. If what you write IS the exact, complete definition, it is i.e. Both are followed by a comma in American English: "e.g.," / "i.e.,".
e.g. = "example given". i.e. = "in essence" or "in explanation". Visual trick: "e.g." has E for Examples. "i.e." has I for "In other words" or "that Is". Quick swap: replace with "for example" — if it fits, use e.g. Replace with "that is" or "in other words" — if it fits, use i.e.
Bryan López
Founder of SpeakUP Academy