Title Case vs Sentence Case: When to Use Each

Title case capitalizes most words: How to Write Better Headlines. Sentence case capitalizes only the first word and proper nouns: How to write better headlines. Neither is more correct – they're competing conventions, and the right one depends on where the text will live. News headlines, academic papers, app interfaces, and email subject lines each have their own norms. Here's how the two styles work and when to use each.

The Difference at a Glance

The mechanical difference is simple – title case has rules about which words to capitalize, sentence case barely has rules at all.

What Is Title Case?

Title case (also called headline case or headline style) capitalizes the first word, the last word, and every major word between them – nouns, verbs, adjectives, adverbs, and pronouns. Minor words stay lowercase: articles (a, an, the), short prepositions, and coordinating conjunctions (and, but, or).

The complexity lives in the word “short.” AP and APA capitalize prepositions of four or more letters, Chicago (18th edition) capitalizes five or more, and MLA lowercases all prepositions regardless of length. The full breakdown is in What Words Are Not Capitalized in a Title? and our capitalization rules guide.

One common misunderstanding: title case is not Capitalizing Every Single Word. The Art Of Saying No – with a capital “Of” – isn't any recognized style. Every guide lowercases at least the articles and short prepositions.

What Is Sentence Case?

Sentence case capitalizes a headline exactly like a sentence: first word up, everything else down unless it's a proper noun. Why remote teams need better meeting notes. That's the whole rule.

The exceptions are the ones you'd expect in any sentence – proper nouns (Google, October, English), the pronoun I, and acronyms (NASA, SEO) keep their capitals. After a colon, most styles capitalize the next word only if it starts a complete sentence – the same judgment call covered in Do You Capitalize After a Colon?

Because there are no length thresholds and no style-guide disagreements, sentence case is faster to write consistently – which is a big part of why digital products have gravitated toward it.

The Same Headlines, Side by Side

Seeing the two styles on identical text makes the tonal difference obvious – title case announces, sentence case talks.

Note the second row: “Slack” keeps its capital in sentence case because it's a brand name. Sentence case never means lowercasing proper nouns.

When to Use Which

There's no universal answer – there are conventions per medium. These are the ones that matter in practice.

News and journalism: split by tradition

The New York Times and The Wall Street Journal still run title case headlines. The BBC, The Guardian, and most British outlets use sentence case – and many digital-first American publications have followed them. If you write for a publication, its style guide decides; AP's own composition-title rules govern how titles of works appear inside articles.

Academic writing: title case, with one APA exception

Paper titles and headings use title case in APA, MLA, and Chicago. The exception: APA 7 switches to sentence case in the reference list – Thinking, fast and slow in the references, but Thinking, Fast and Slow in the body text.

Interfaces and product writing: the giants disagree

Apple's Human Interface Guidelines use title case for most controls – menu items, buttons, alert titles. Google standardized on sentence case across Material Design and its developer documentation. Neither is wrong; what's wrong is mixing them. Pick one, write it into your design system, and apply it everywhere.

Marketing and email: match the register

Title case signals polish and promotion – it suits product launches, landing pages, and newsletter mastheads. Sentence case signals a person talking – it suits outreach, onboarding emails, and UX copy. The practical test: read it aloud. If it should sound like an announcement, use title case; if it should sound like a message, use sentence case.

Common Mistakes

Most capitalization problems aren't about picking the wrong style – they're about applying the chosen style inconsistently.

• Mixing styles on one page. A title case H1 above sentence case H2s (or the reverse) reads as sloppy even when each heading is individually correct. Audit the whole page, not each heading.
• Capitalizing Every Word Including The Small Ones. That's not title case – articles and short prepositions stay lowercase in every style guide.
• Lowercasing proper nouns in sentence case. why iphone users switch to android is wrong in any style – brand names and proper nouns always keep their capitals.
• Forgetting the first and last word rule. In title case, the first and last words are capitalized no matter what they are: Something to Believe In ends with a capitalized “In.”
• Letting your CMS decide. Some themes force uppercase or title case via CSS. Check what's actually rendered, not just what you typed.

Quick Reference

Choose title case if you're writing for US news, books, academic titles and headings, or a brand with a formal, editorial voice.

Choose sentence case if you're writing UK-style news, UX and interface copy, conversational marketing, or documentation – or if you want the lowest-maintenance rule set.

Either way: apply one style everywhere, keep proper nouns capitalized, and let a tool handle the fiddly words. Our Title Case Converter applies AP, APA, Chicago, or MLA rules, and the Sentence Case Converter handles the reverse in one click.

Sources

• APA Style: Title Case Capitalization – where APA requires title case
• APA Style: Sentence Case Capitalization – where APA requires sentence case, including reference lists
• MLA Style: Capitalization of Titles – MLA's headline-style rules
• Google Developer Documentation Style Guide: Capitalization – Google's sentence-case standard for headings and UI
• Apple Human Interface Guidelines: Writing – Apple's title-case conventions for interface elements

Frequently Asked Questions