Title case vs sentence case: which one should you use and when?

Apple says capitalize it. Google says don’t.

Two of the world’s most design-obsessed companies have looked at the exact same question and landed on opposite answers. Apple’s Human Interface Guidelines call for title case across buttons, navigation, and menus. Google’s Material Design recommends sentence case for everything.

So who’s right?

Both of them. It just depends on context.

Title case capitalizes the first letter of every major word: The Rise of Artificial Intelligence. Sentence case capitalizes only the first word and proper nouns: The rise of artificial intelligence.

Simple enough in theory. But knowing when to use which, across blog posts, UI copy, academic papers, and email subject lines, is where most writers and designers get tripped up.

That’s exactly what this guide covers.

What is title case?

Most people capitalize the first word of a heading and call it a day. That’s not title case.

Some capitalize every single word, including “and,” “the,” and “of.” That’s not title case either.

Title case has a specific set of rules, and once you see them side by side, they click instantly.

What it looks like vs. what it doesn’t

❌ Wrong	✅ Correct
The rise of artificial intelligence	The Rise of Artificial Intelligence
The Sound Of Music	The Sound of Music
A guide To better writing	A Guide to Better Writing
this is us	This Is Us

The rule behind the pattern

Capitalize the words that carry meaning: nouns, verbs, adjectives, adverbs, and pronouns.

Leave lowercase the words that just connect things: articles (a, an, the), short prepositions (in, on, at, by, to), and coordinating conjunctions (and, but, or, so, yet, for, nor).

The exceptions that trip people up

Short words that still get capitalized:

“Is,” “are,” “was,” “be,” “been” look small but they are verbs. Verbs always get capitalized.

❌ Wrong	✅ Correct
What is Love?	What Is Love?
Where the Crawdads sing	Where the Crawdads Sing
This is us	This Is Us

Prepositions that cross the length threshold:

Short prepositions (in, on, at, by) stay lowercase. Prepositions of five or more letters get capitalized.

Word	Length	In title case
in	2 letters	lowercase
on	2 letters	lowercase
about	5 letters	Capitalized
between	7 letters	Capitalized
through	7 letters	Capitalized

The contrast-first opening shows readers what title case isn’t before defining what it is, so the rules feel like the answer to a puzzle rather than a lecture. The tables do the heavy lifting visually.

What is sentence case?

It’s not “capitalize everything important.”

It’s not “capitalize every word that looks significant.”

Sentence case is actually the simplest capitalization style of the two. You already use it every time you write a text message, an email, or a social media post. You just may not have known it had a name.

What it looks like vs. what it doesn’t

❌ Wrong	✅ Correct
the rise of artificial intelligence	The rise of artificial intelligence
How To Write Better Blog Posts	How to write better blog posts
A Guide To Better Writing	A guide to better writing
best practices for ux designers	Best practices for UX designers

The rule behind the pattern

Capitalize two things only:

1. The first word of the heading or sentence
2. Proper nouns,  names of people, brands, places, and specific products

That’s the entire rule.

What still gets capitalized (and what doesn’t)

This is where most readers get confused. Sentence case does not mean everything goes lowercase. Proper nouns always keep their capital letter, no matter where they appear in a sentence.

Example	Why
Best practices for UX designers	UX is an acronym, always capitalized
A beginner’s guide to Google Analytics	Google and Analytics are proper nouns
How to use Slack for remote teams	Slack is a brand name
Why sentence case feels more natural	No proper nouns, only first word capitalized

Why it feels more natural to read

Sentence case mirrors the way we write in everyday language. A heading written in sentence case reads like a normal sentence, which reduces the mental effort of scanning it. This is one reason why most blogs, apps, and global brands have shifted toward sentence case over the past decade.

More on that in the UX and readability sections ahead.

Title case vs. sentence case: key differences at a glance

Now that you know how each style works individually, here’s how they stack up directly against each other.

Side by side comparison

	Title case	Sentence case
Formality	Formal, authoritative	Casual, conversational
Readability	Slower to scan, more visual weight	Faster to scan, lower cognitive load
Dominant in	United States	UK, Europe, global brands
Best for	Book titles, formal essays, news headlines, CTA buttons	Blog headings, UI copy, social media, email subjects
Style guides	MLA, Chicago, AP (compositions only)	AP (headlines), Google, most modern web style guides
Example	A Beginner’s Guide to Content Marketing	A beginner’s guide to content marketing

What do the major style guides say?

If you are writing for a specific publication, industry, or academic institution, the choice between title case and sentence case is rarely yours to make. A style guide has already made it for you.

Here is exactly what each major guide prescribes.

The style guide matrix

Style guide	Headings	Body text	Reference list	Key exception
APA 7th ed.	Title case	Sentence case	Sentence case	Title case in running text, sentence case in reference entries — two different rules in the same document
MLA	Title case	Sentence case	Title case	Prepositions under 4 letters stay lowercase
Chicago Manual of Style	Title case	Sentence case	Title case	Subtitle after a colon starts with a capital letter
AP Stylebook	Sentence case	Sentence case	N/A	Title case only for composition titles like books and films
Google Material Design	Sentence case	Sentence case	N/A	Sentence case across all UI elements including buttons
Apple HIG	Title case	Sentence case	N/A	Title case for navigation, buttons, and tab bars only
Medium	Title case	Sentence case	N/A	Title case preferred for article headlines per curation guidelines

The two that confuse people most

APA is the trickiest. Most writers assume one rule applies throughout. It doesn’t. When you mention a book or article title inside the body of your paper, you use title case. When that same title appears in your reference list at the end, you switch to sentence case.

Like this:

Body text: In their study, Johnson and Lee reference findings from The Effects of Screen Time on Sleep Quality in Adolescents.

Reference list: Johnson, M., & Lee, P. (2021). The effects of screen time on sleep quality in adolescents. Journal of Sleep Research.

AP style surprises most people too. Because AP is the standard for journalism and news writing, many assume it follows the formal title case convention you see in newspaper headlines. It doesn’t. AP uses sentence case for all headlines. Title case in AP is reserved strictly for composition titles like books, films, and albums.

What this means in practice

If you are writing for:

• Academic journals or university papers → check whether APA, MLA, or Chicago applies and follow the matrix above
• News or PR content → default to AP sentence case for headlines
• A digital product on iOS → follow Apple and use title case for UI elements
• A digital product on Android or the web → follow Google and use sentence case throughout
• A blog with no house style guide → sentence case is the modern default and the safer choice

When to use title case

There is a simple way to know if title case is the right call. Run through this quick checklist before you write your heading.

The title case checklist

Before you capitalize, ask yourself these four questions:

1. Is this a composition title? Books, films, songs, albums, TV shows, and podcasts always get title case regardless of which style guide you follow. If it is the official title of a published or released work, title case is the universal standard. No exceptions.

2. Am I writing within a formal style guide framework? MLA and Chicago both require title case for paper headings and essay titles. APA requires it for titles mentioned inside the body of a paper. If a style guide governs your writing, check the matrix in Section 04 and follow it exactly.

3. Am I designing for an Apple platform? Apple’s Human Interface Guidelines are explicit. Title case applies to navigation bars, tab labels, buttons, action sheets, and menu items on iOS and macOS. If your product lives on Apple platforms, title case in UI is not a stylistic preference. It is the expected convention.

4. Do I want to signal authority, formality, or gravitas? Title case carries visual weight. If your content is meant to feel premium, traditional, or authoritative, think financial services, legal writing, luxury brands, or long-form journalism,  title case reinforces that positioning consistently across every touchpoint.

If you answered yes to any of those four questions, title case is your answer.

Where real brands use it

Brand	Where they use title case	Why it works
Apple	All UI elements, navigation, buttons, menus	Follows HIG guidelines, signals polish and precision
The New York Times	All article headlines and section titles	Creates visual separation between headline and body copy
McKinsey	Report titles, article headlines, section headings	Reinforces the authoritative, premium consultancy positioning
Harvard Business Review	All article titles and feature headlines	Matches the formal, academic tone of the publication
LinkedIn	Article titles and newsletter headlines	Title case signals professional intent on a business platform

One rule to remember

If you strip away all the context and just need one mental shortcut, use this:

Is this a composition title or formal academic heading? Use title case.

Is this a UI element on an Apple platform? Use title case.

Does your brand need to feel authoritative and traditional? Use title case consistently and document it in your house style guide so your whole team follows the same standard.

When to use sentence case

There is a simple way to know if sentence case is the right call. Run through this quick checklist before you write your heading.

The sentence case checklist

Before you capitalize, ask yourself these four questions:

1. Am I writing for the web or a digital product? If yes, default to sentence case. Blogs, apps, websites, and SaaS products have largely standardized around it. Google, Slack, HubSpot, Notion, and Figma all use sentence case across their entire product interfaces and content libraries.

2. Am I writing in a conversational tone? If your brand voice is warm, approachable, or casual, sentence case is the natural fit. Title case creates distance. Sentence case closes it. Mailchimp switched to sentence case across its entire product and marketing content specifically because it felt more human and less corporate.

3. Am I writing for an international audience? If yes, sentence case is the safer choice. Outside the United States, sentence case is the default capitalization style in British English, Australian English, and most European languages. Title case is largely an American convention. Global brands like Spotify, Airbnb, and Dropbox use sentence case because it travels better across markets.

4. Is my content informal, instructional, or social? Blog posts, how-to guides, email newsletters, social media captions, push notifications, and in-app messages all read more naturally in sentence case. They are written to be consumed quickly, not studied.

If you answered yes to any of those four questions, sentence case is your answer.

Where real brands use it

Brand	Where they use sentence case	Why it works
Google	All UI labels, buttons, menus, error messages	Follows Material Design guidelines across all products
Slack	Channel names, app navigation, blog headings	Keeps the tone casual and approachable for workplace chat
HubSpot	Blog post headings, email subjects, CTAs	Consistent with their conversational inbound marketing voice
Notion	All product UI, help docs, template titles	Sentence case matches the minimal, focused product aesthetic
Spotify	Playlist names, feature labels, editorial content	Works across 180 markets without feeling culturally American

One rule to remember

If you strip away all the context and just need one mental shortcut, use this:

Is this a title of a published work (book, film, song, album)? Use title case.

Is this anything else, a heading, a label, a button, a caption? Use sentence case and only revisit that choice if a specific style guide tells you otherwise.

That single filter handles the majority of capitalization decisions most writers face every day.

Which one is better for SEO?

Google has never officially said it prefers one over the other. Capitalization is not a ranking signal. But that is only half the answer.

Because while the algorithm may not care, your readers do. And reader behavior directly affects SEO.

Semrush ran a split test comparing both styles across article headlines in search results. Title case generated roughly 2.4% more organic clicks. The reason is simple: most search results are written in sentence case. A title case headline stands out and reads as more deliberate.

But once a reader lands on your page, the dynamic flips. Title case throughout a long article creates visual friction and slows people down. Sentence case subheadings are faster to scan and easier to move through. Dwell time drops when reading feels like effort, and dwell time is something Google does pay attention to.

The approach that works best in practice

Element	Recommended style
SEO title tag	Title case
H1 heading	Title case
H2 and H3 subheadings	Sentence case
Meta description	Sentence case
Image alt text	Sentence case

Title case where first impressions are made. Sentence case where reading actually happens.

Frequently asked questions