The contraction for that is is that’s. Practically speaking, this shortened form combines the demonstrative pronoun that with the verb is, replacing the missing letter i with an apostrophe. Whether you are texting a friend, writing an email, or speaking in casual conversation, you have likely used “that’s” dozens of times without thinking about the grammar behind it. Understanding how this contraction works, when to use it, and when to avoid it can help you communicate more clearly and confidently in both spoken and written English.
What Is the Contraction for That Is?
In English, a contraction is a shortened version of two words combined into one. The contraction for that is is that’s. To form it, you take the word that, keep the word is, remove the letter i from is, and insert an apostrophe in its place Which is the point..
People argue about this. Here's where I land on it.
For example:
- Uncontracted: That is my favorite book.
- Contracted: That’s my favorite book.
Both sentences mean exactly the same thing. The only difference is tone. The contracted version sounds more natural, conversational, and efficient, which is why contractions dominate everyday speech and informal writing The details matter here. And it works..
How Contractions Work in English
Contractions follow a consistent pattern across the language. Two words are merged, one or more letters are omitted, and an apostrophe marks the spot where the letters used to be. Here are a few common examples:
- I am → I’m
- Do not → Don’t
- She is → She’s
- They are → They’re
- That is → That’s
In the case of that’s, the apostrophe replaces the i in is. This punctuation mark is not optional; it signals to the reader that a letter has been removed. Without it, the word becomes thats, which is not a valid contraction in standard English.
How to Use “That’s” in Sentences
You can use that’s anywhere you would normally use that is, provided the context allows for a less formal tone. It functions as a subject-verb pair and can appear at the beginning or middle of a sentence It's one of those things that adds up..
At the beginning of a sentence:
- That’s a great idea.
- That’s why I called you.
- That’s all I have to say.
In the middle of a sentence:
- I believe that’s the correct answer.
- She said that’s not what she meant.
To express an opinion or observation:
- That’s amazing!
- That’s too bad.
- That’s exactly what I was thinking.
Because that’s is so versatile, it appears constantly in dialogue, storytelling, emails, social media posts, and presentations. It helps writing feel less stiff and more like natural human speech Small thing, real impact..
“That’s” vs. “Thats”: The Apostrophe Matters
One of the most common mistakes writers make is dropping the apostrophe and writing thats instead of that’s. In standard English, thats without an apostrophe is incorrect when you mean that is Worth keeping that in mind..
The confusion often happens because people associate apostrophes only with possession, as in the dog’s leash or Sarah’s car. On the flip side, apostrophes also serve a grammatical purpose in contractions by showing where letters have been omitted Easy to understand, harder to ignore..
- Correct: That’s the right way to do it.
- Incorrect: Thats the right way to do it.
If you are unsure, try expanding the contraction back into two words. If that is fits logically in the sentence, then you need the apostrophe: that’s That's the part that actually makes a difference..
When to Use (and Avoid) Contractions
Knowing the contraction for that is is only half the battle. You also need to know when it is appropriate to use it.
Use “That’s” in Informal Contexts
Contractions are perfectly acceptable—and often preferred—in the following situations:
- Personal emails and text messages
- Social media captions and comments
- Blog posts and informal articles
- Fiction and creative writing
- Spoken presentations and speeches
- Dialogue in scripts or novels
Using that’s in these settings makes your tone feel friendly, approachable, and conversational Nothing fancy..
Avoid “That’s” in Formal Contexts
In formal or academic writing, contractions are generally discouraged because they can make the text seem too casual. You should spell out *that
is* instead.
Examples of where to avoid contractions:
- Academic research papers and theses
- Formal business reports and proposals
- Legal contracts and official government documents
- Professional correspondence with new clients or superiors (until a rapport is established)
- Journalism adhering to strict style guides (e.g., The New York Times, The Economist)
In these contexts, writing “That is the conclusion of the study” carries more authority and precision than “That’s the conclusion of the study.” If you are ever in doubt about the required formality level, defaulting to the full two-word version is never wrong; it is simply more formal Most people skip this — try not to..
Some disagree here. Fair enough.
A Quick Note on “That’s” vs. “Thats” in Possession
Worth mentioning that that does not use an apostrophe to show possession. Consider this: the possessive form of that is thats (no apostrophe), though it is rarely used in modern English because it sounds awkward. We typically rephrase to avoid it.
- Awkward/Rare: That’s color is fading. (Incorrect usage of contraction)
- Awkward/Rare: Thats color is fading. (Technically possessive form, but poor style)
- Better: The color of that is fading. / That color is fading.
This distinction reinforces the rule: if you see an apostrophe in that’s, it always represents the missing i in that is. It never indicates ownership That's the whole idea..
Conclusion
Mastering that’s is a small but mighty step toward writing with clarity and confidence. By remembering that the apostrophe marks the omission of the letter i—turning that is into a single, efficient syllable—you eliminate one of the most pervasive errors in everyday writing. Whether you are drafting a quick text, a blog post, or a novel, using that’s correctly signals to your reader that you have a firm grasp of the mechanics of language. And when the situation demands formality, you now know exactly when to set the contraction aside and let that is stand on its own Most people skip this — try not to..
