Title Case vs Sentence Case — Which One Should You Use?
It seems like a minor detail — capitalising a few extra words in a heading. But consistent, correct use of Title Case vs Sentence case is one of the clearest markers of professional writing. Get it wrong across a website or document, and readers notice, even if they can't explain why.
This guide covers exactly when each case is correct, which style guides say what, and how to apply the rules without memorising them.
What is Title Case?
Title Case capitalises the first letter of most words in a phrase. The exact rules vary by style guide, but the general principle is: capitalise all "major" words and leave "minor" words lowercase.
Title Case Rules — What Gets Capitalised?
✅ Always Capitalise These in Title Case
- Nouns: Book, River, City, Dream
- Verbs: Run, Is, Are, Feels, Become
- Adjectives: Beautiful, Quick, Ancient
- Adverbs: Quickly, Never, Always
- The first word of the title — always, regardless of what word it is
- The last word of the title — always
- Proper nouns: India, Google, Shakespeare, Mumbai
- Pronouns: He, She, It, They, I
❌ Usually Lowercase in Title Case
- Articles: a, an, the
- Short prepositions (under 4–5 letters): in, on, at, by, for, of, to, up
- Coordinating conjunctions: and, but, or, nor, yet, so
- The "to" in infinitives: "How to Write" — "to" stays lowercase
Title Case by Style Guide — APA, AP, Chicago, MLA
Here's where it gets nuanced — different style guides have different rules, and knowing which one your publication follows matters:
| Style Guide | Prepositions | Conjunctions | Articles | Used By |
|---|---|---|---|---|
| APA 7th | Lowercase if under 4 letters | Lowercase if under 4 letters | Lowercase (a, an, the) | Psychology, social sciences, academic journals |
| AP Style | Lowercase if under 4 letters | Lowercase (and, but, or) | Lowercase | News, journalism, press releases |
| Chicago | Lowercase if under 5 letters | Lowercase (and, but, or, for, nor) | Lowercase | Books, publishing, humanities |
| MLA | Lowercase (most) | Lowercase (coordinating only) | Lowercase | Literature, humanities, academic papers |
| Bluebook | Capitalise all | Capitalise all | Lowercase | Legal writing, law journals |
What is Sentence Case?
Sentence case capitalises only the first word of the sentence (or heading) and any proper nouns. Everything else is lowercase — exactly like a normal sentence.
When to Use Title Case vs Sentence Case — Quick Decision Guide
| Content Type | Recommended Case | Example |
|---|---|---|
| Blog post titles | Title Case | How to Write a Blog Post That Ranks on Google |
| Blog subheadings (H2, H3) | Sentence case | Why sentence case works better for subheadings |
| Book and movie titles | Title Case | The Lord of the Rings: The Fellowship of the Ring |
| UI buttons and CTAs | Sentence case | "Get started" not "Get Started" |
| Navigation menus | Either (be consistent) | "About us" or "About Us" — pick one and stick to it |
| Email subject lines | Sentence case | Your order has shipped — looks more personal |
| Academic paper titles | Title Case (per style guide) | The Effects of Climate Change on Ocean Biodiversity |
| Social media posts | Sentence case | Natural, conversational feel |
| News headlines | Sentence case | Indian startup raises $50 million in Series B round |
| Product names | Title Case | iPhone 16 Pro, Google Pixel 9, Samsung Galaxy S25 |
The Modern Trend: Sentence Case Is Taking Over
If you look at major tech companies' websites — Apple, Google, Notion, Figma, Stripe — almost all their UI copy and headings now use sentence case. This is a deliberate shift driven by UX research showing that sentence case is:
- More readable — the eye processes lowercase text faster than title-cased text
- More conversational — feels less formal and distant, closer to how people actually speak
- More accessible — easier for users with dyslexia and other reading differences
- Consistent with content — body text is always sentence case, so headings in the same case feel unified
However, blog post H1 titles and formal document headings still widely use Title Case, because it conveys authority and signals "this is an important headline."
🔤 Convert Any Text — Title Case, Sentence Case, and More
Paste your text, click the case you need. Works instantly, completely free.
Open Case Converter →Common Mistakes to Avoid
| Mistake | Wrong | Right |
|---|---|---|
| Capitalising "is" in Title Case | The Cat is On the Mat | The Cat Is on the Mat |
| Capitalising "the" mid-title | Jack and The Beanstalk | Jack and the Beanstalk |
| Mixing cases inconsistently | Welcome to Our Store / about us / Contact | Welcome to Our Store / About Us / Contact |
| Capitalising every word in sentence case | How To Use A Password Manager | How to use a password manager |
| Lowercase proper nouns in sentence case | How to visit india on a budget | How to visit India on a budget |
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Frequently Asked Questions
Yes — "is" is a verb, and verbs are always capitalised in Title Case regardless of their length. "The Cat Is on the Mat" is correct Title Case. This surprises many people who assume short words are always lowercase.
Modern best practice and most major publications (including Google's own style guide) recommend Sentence case for H2 and H3 subheadings. Title Case is typically reserved for the main H1 title. Using Sentence case for subheadings improves readability and makes the page feel more natural.
Title Case is most commonly used for blog H1 titles (the clickable headline in Google search results) and tends to look more authoritative. However, some high-authority sites use Sentence case successfully. The most important thing is consistency across your site — pick one and apply it everywhere.
Google treats "title case" and "sentence case" titles equally for ranking purposes — capitalisation itself is not a direct ranking factor. However, the capitalisation style can affect click-through rate (CTR), which does influence rankings indirectly. Title Case in H1 titles often has slightly higher CTR because it looks more like a professional headline.
Conclusion
The choice between Title Case and Sentence case isn't random — it's a deliberate signal about formality, professionalism, and reading experience. As a quick reference:
- Blog H1 titles, book names, product names: Title Case
- Subheadings, UI copy, email subjects, social posts: Sentence case
- Academic papers: Follow the assigned style guide (APA, Chicago, MLA)
- Whatever you choose: Be consistent across your entire site or document