Title case and sentence case are two different capitalisation styles used in headings, titles, and other text. Choosing the wrong one for a given context looks unprofessional and inconsistent. Understanding the rules for each helps you write correctly across different formats: articles, emails, presentations, academic papers, and web content. Use the Case Converter to instantly convert any text between title case, sentence case, and other case formats.
What is Title Case?
Title case capitalises the first letter of most words in a heading or title. The specific rules vary slightly between style guides (APA, MLA, Chicago, AP) but the general principle is: capitalise all major words (nouns, verbs, adjectives, adverbs, pronouns) and leave minor words in lowercase (articles, conjunctions, short prepositions) unless they appear at the start of the title. For example: “The Quick Brown Fox Jumps Over the Lazy Dog” in title case capitalises “The” at the start, all main words, and leaves “the” in the middle in lowercase because it is an article not at the start of the title.
Title Case Rules by Style Guide
- APA Style: Capitalise words of 4 or more letters in all positions. “with” and “that” are lowercase; “From” and “After” are capitalised because they are 4 or more letters.
- Chicago Manual of Style: Capitalise all words except articles (a, an, the), coordinating conjunctions (and, but, or, nor, for, so, yet), and prepositions of fewer than 5 letters.
- AP (Associated Press) Style: Capitalise all words of 4 or more letters. Similar to APA but with slight differences in conjunction treatment.
- MLA Style: Capitalise all significant words regardless of length, leaving only articles, short prepositions, and coordinating conjunctions in lowercase unless they start the title.
What is Sentence Case?
Sentence case capitalises only the first word of the heading or title and any proper nouns. It looks exactly like a normal English sentence. For example: “The quick brown fox jumps over the lazy dog” in sentence case. Only the first word “The” and any proper nouns (names of specific people, places, organisations, brands) would be capitalised. Sentence case is simpler to apply consistently because it follows normal English grammar rules without requiring knowledge of which words count as major or minor.
When to Use Title Case
- Book and film titles: “The Lord of the Rings”, “A Brief History of Time”. Both follow title case conventions in publishing.
- News article headlines: Most English-language newspapers and news websites use title case for headlines, particularly in the US. “President Signs New Climate Agreement” is more common in American media than “President signs new climate agreement”.
- Marketing and brand copy: Product names, campaign names, and marketing headlines often use title case to convey formality and brand consistency.
- Navigation and UI labels: Menu items, button text, and app section names typically use title case: “My Account”, “Order History”, “Contact Support”.
When to Use Sentence Case
- Blog post headings (H2, H3): Most modern style guides and content publishers prefer sentence case for subheadings within articles because it is easier to read and feels more conversational.
- Email subject lines: Marketing research has shown that sentence case subject lines often achieve higher open rates than title case, possibly because they feel less like a formal advertisement.
- Academic papers: APA and MLA style both use sentence case for in-text references to paper titles and for headings within the body of the paper.
- Google-style content: Google’s own Search Central documentation, Material Design guidelines, and most major tech company style guides (Microsoft, Mailchimp) specify sentence case for UI text and documentation headings.
Frequently Asked Questions
Which case style should I use for SEO meta titles?
Both title case and sentence case are used by high-ranking pages. Title case often looks more polished and authoritative for competitive commercial keywords. Sentence case can feel more natural and conversational for informational queries. The most important factors for meta titles are including the target keyword near the start, keeping the title under 60 characters, and accurately describing the page content. Consistency across all pages on your site matters more than which specific style you choose.
Should I capitalise prepositions like “on”, “in”, “at” in titles?
In Chicago and AP style, short prepositions (under 4 to 5 letters) are not capitalised unless they appear at the start of the title. So “on”, “in”, “at”, “for”, “of”, and “to” are lowercase in the middle of a title. However, “From”, “Into”, “With”, “Against” and other longer prepositions are capitalised. When using the Case Converter, select the style guide that matches your organisation’s guidelines for consistent results.
Is it wrong to mix title case and sentence case on the same website?
Yes, mixing styles within the same type of content element is inconsistent and looks unprofessional. Choose one style for H1 titles, one for H2 subheadings, and one for navigation labels, and apply them consistently across all pages. Many organisations use title case for page titles and H1s while using sentence case for body copy subheadings (H2, H3).
Does capitalisation affect search ranking?
Search engines are not case-sensitive for ranking purposes. Google treats “Home Loan EMI Calculator” and “home loan EMI calculator” as the same query. However, capitalisation affects click-through rate in search results because properly capitalised titles look more professional and trustworthy. Higher CTR from well-formatted meta titles is a positive engagement signal that can indirectly influence ranking over time.