Primary headings are like storefront signs. If the numbers look messy, readers hesitate, even if the content is great.
The tricky part is that title case numbers has two jobs at once: keep capital letters consistent (Title Case), and make number formatting look intentional (words vs digits). This guide gives quick formatting guidelines you can apply for title case headings, calls out where style guides vary, and ends with 75 copy-ready examples.
The Fast Rules for Title Case Numbers (Do This, Not That)
Number formatting is separate from capitalization rules. First, pick a title case system for words (APA, Chicago, MLA, or your brand style guide). If you’re switching between guides often, keep a reference like this title case styles comparison nearby.
Then use these practical number rules for titles, and lock them in as a house style when your style guide is silent.
| Situation in a Title | Do | Don’t |
|---|---|---|
| Plain counting numbers | Use digits when scanability matters (marketing, news), especially 10+ | Mix styles in one headline (5 Tips and Ten Mistakes) |
| Starting a title with a number | Spell out numbers, or rewrite the title (much like you would to begin a sentence) | Start with a digit if your style guide discourages it (brand or academic rules often do) |
| Dates and years | Keep digits for dates and years (2026, Feb. 11, 2026) | Spell out long years (Two Thousand Twenty-Six) |
| Times | Use digits with a.m./p.m. when time matters (7:30 p.m.) | Write Seven Thirty PM unless your brand prefers words |
| Measurements and units | Use digits with unit symbols/abbreviations and acronyms for units of measurement (3 km, 10 GB, 2 TB) | Spell out unit modifiers in technical titles where precision matters |
| Percentages | Use digits with the percentage symbol when the value matters (5%, 22%) | Swap between 5% and Five Percent in the same series |
| Ordinals | Use 1st, 2nd, 3rd for tight UI, charts, and sports | Use awkward hybrids (First-Place Finish: 2nd Time) |
| Ranges | Use “10 to 12” in plain text, or an en dash (U+2013) in typography | Use a hyphen for ranges if your style guide prefers an en dash |
| Compound number words | Follow hyphenation rules for compound words: hyphenate 21 to 99 when spelled out (Twenty-One) | Write Twenty One if you mean the number (not two separate words) |
| Model names and versions | Keep official styling (iPhone 16, B2B, 5G, v2.1) | “Fix” brand numerals into words (Five G) unless required |
Note that formatting in a reference list may differ from these title rules.
If you need a style-specific refresher for capitalization (not number rules), see APA title case rules or Chicago title case rules. Those pages help with what gets capitalized, while the sections below help with what stays a digit.
Tricky Number Cases Editors Argue About (And How to Decide)
Some number choices aren’t “right vs wrong,” they’re “pick one and be consistent.” When your guide doesn’t state a clear headline rule, set a house rule and apply it everywhere, including subheadings and secondary headings.
Ranges (and the en dash issue): Many publishers prefer an en dash (U+2013) for numeric ranges, like page spans and score ranges in technical reports. If you can’t reliably type it (CMS fields, email subject lines), use “to” instead of a hyphen.
Example options: Pages 10 to 12 in the 2026 Report (plain text friendly) vs Pages 10 (en dash) 12 in the 2026 Report (typography).
“Top 10” vs “Top Ten”: This is mostly a context call. Marketing and news often use digits because they pop in a feed. Academic titles may prefer spelled-out numbers for a calmer look. If your series is list-heavy, digits help readers scan, just keep the rule steady across the whole blog.
Percentages (5% vs Five Percent): APA commonly uses numerals with the percent sign in quantitative contexts, but many brands spell out “Percent” for a more editorial feel, paying attention to significant digits and decimal places for precision. Decide based on the promise of the title. If the number is the point, keep digits. If the idea is the point, spelling it out can read smoother.
Units (3 km vs Three Kilometers): Use digits with units in science, fitness, data, and SaaS (3 km, 10 GB, 99.9% uptime), especially metric units and standard deviation in scientific writing. Spell out in more narrative titles, or when the measurement is casual and not exact. Note that in-text citations and the reference list often handle number formatting differently when paired with abbreviations and acronyms for technical labels.
“No.” vs “Number”: Many titles use No. when it’s followed by a figure (No. 7, No. 1), particularly with abbreviations and acronyms for brand names. “Number” reads more natural in consumer and how-to titles. If your content has both (rankings and product IDs), reserve “No.” for rankings and “Number” for identifiers.
If you write AP-style headlines, a quick outside reference can help you sanity-check capitalization patterns, try an AP style title capitalization tool as a second set of eyes. Then bring it back to your house rules for numbers, aligning with your style guide’s formatting guidelines.
75 Copy-and-Paste Examples Using Title Case Numbers
These copy-and-paste examples using title case numbers are ideal for table titles, figure legends, and categories like academic degrees.
| Example A | Example B | Example C |
|---|---|---|
| Top 10 Email Subject Lines | 7 Ways to Cut Churn | 3 Metrics Your CFO Cares About |
| The 5-Minute Onboarding Fix | A 30-Day Content Plan | Your First 90 Days as Manager |
| 2026 Marketing Benchmarks | Q2 Pipeline Review Template | The 2025 to 2026 Budget Reset |
| 5% Price Increase Script | Twenty-One Remote Work Tips | The 50/30/20 Budget Rule |
| No. 1 Mistake in UX Writing | Number 2 Pencil, Still Useful | Lesson 3: Clean Data |
| From 0 to 1 Product Strategy | Level 2 Support Playbook | Stage 4 Funnel Problems |
| 1st Draft, Final Edit | Second Pass Proofreading | Third-Party Risk Checklist |
| 4K Video Export Settings | 1080p vs 4K for Ads | 5G Rollouts and Latency |
| 3 km Training Run Plan | 10,000 Steps a Day Myth | Two-Hour Deep Work Block |
| 24/7 Support Expectations | 9-to-5 Scheduling Reality | A 12-Month Road Map |
| Pages 10 to 12 Summary | Chapters 1 to 3 Study Guide | Weeks 2 to 6 Meal Prep |
| The 2-Email Follow-Up | A Three-Email Nurture Flow | The 7-Email Welcome Series |
| Version 2.1 Release Notes | iOS 18 Migration Checklist | Windows 11 Setup Guide |
| B2B Lead Scoring Basics | B2C Landing Page Teardown | C3PO-Level Naming Mistakes |
| 3D Printing Safety Rules | 2FA Setup for Teams | A 1-Click Export Option |
| The 8-Point Brand Audit | A 6-Step Bug Triage | The 4-Step Sales Call |
| A 15-Minute Team Retro | One-Week Sprint Planning | The 13-Week Quarter Plan |
| 5-Star Review Response Guide | A 1-Star Crisis Playbook | The 3-Star Improvement Plan |
| The 20-Page Thesis Outline | A 10-Page Research Brief | The 3-Page Executive Memo |
| 10 GB Storage, What Fits | 3 TB Backup Strategy | A 500 MB File Limit |
| The 60-Second Hook Test | A 2-Minute Demo Script | The 45-Minute Webinar Plan |
| The 7th Edition Update | A 2nd Edition Preface | First-Year Student Survival |
| The 1990s Design Comeback | Best of the 2000s Pop | Why 2026 Feels Different |
| 12 Lessons From 12 Launches | 7 Habits of Calm Teams | 3 Rules for Better Meetings |
| The 100-Day Writing Challenge | The 14-Day Trial Email | A 5-Day Editing Sprint |
Clean number formatting makes titles easier to skim, and easier to trust. Some examples spell out numbers for stylistic emphasis, while others incorporate abbreviations and acronyms such as B2B and 5G alongside proper nouns like iOS 18. Proper nouns such as Windows 11 and C3PO also fit seamlessly. It keeps your archive consistent in electronic format, much like a reference list with precise in-text citations in academic styles; this is where small style choices start to pay off.
Pick a rule set, apply it everywhere, and save your brain for the ideas. If you want, grab a few examples above and turn them into a repeatable template for your next month of headlines, subheadings, or reference lists.
