Subtitle Formatting Rules: 2026 Guide to Dates & Times
Nothing ruins a crisp interview edit faster than seeing "$50 USD" rendered as "fifty dollars U.S.D." across two clumsy lines of text. I used to waste four hours per client episode manually cleaning up
Nothing ruins a crisp interview edit faster than seeing "$50 USD" rendered as "fifty dollars U.S.D." across two clumsy lines of text. I used to waste four hours per client episode manually cleaning up default caption transcripts in Adobe Premiere Pro. That stopped the day I standardized my subtitle formatting rules.
When auto-transcription tools drop raw text onto your timeline, they do not care about character limits, visual flicker, or broadcast style guides. They transcribe speech verbatim. If a guest says "the fourth of July nineteen eighty-five," Premiere Pro writes out every single word unless you intervene.
Here is the problem: unformatted captions look amateur. In this guide, I will break down the exact industry rules for formatting numbers, dates, times, and currency in subtitles. Whether you edit broadcast documentaries or cut 9:16 vertical clips for social media, these standards will keep your titles clean and readable.
Key Takeaways
- Spell out numbers zero through ten as words; use numerals for numbers 11 and above.
- Never convert spoken currency amounts to local viewing currencies; always preserve the original spoken monetary value.
- Strip redundant spoken clutter like 'the' and 'of' from dates (e.g., use 'July 4th' instead of 'the 4th of July').
- Format exact times using numerals followed by lowercase 'a.m.' or 'p.m.' (e.g., 9:30 a.m.).
- Keep subtitle events to a maximum of two lines, with 32 to 42 characters per line.
- Maintain a minimum gap of 125ms to 250ms (3 to 6 frames at 24fps) between consecutive subtitle cards to prevent screen flicker.
- Automate style compliance in Premiere Pro using plugins like KreateFlo CaptionFlow rather than fixing text manually.
How to Format Dates, Times, and Currency in Subtitles: The Core Rules
Before diving into specific digits or dollar signs, you need to understand the physical constraints of video subtitles. Subtitles exist to be read effortlessly while the viewer watches the visual action. If text fills half the screen or jumps too quickly, reading comprehension collapses.
Standard broadcast and streaming specifications enforce strict boundaries on text volume. According to the Netflix Timed Text Style Guide General Requirements [3], dialogue subtitles must stick to a maximum of two lines per subtitle event. Each line should contain between 32 and 42 characters [5].
The BBC Subtitle Style Guide 2024 [9] specifies similar constraints to prevent text from overlapping lower-third graphics. Furthermore, professional guidelines set the minimum display duration at 5/6 of a second—roughly 20 frames at 24fps [3]. The maximum duration for a single static caption event is capped at 6 to 7 seconds [3].
+-------------------------------------------------------+
| [Video Frame Area] |
| |
| |
| Line 1: Clean subtitle text line (Max 32-42 CPL) |
| Line 2: Second line of context (Max 32-42 CPL) |
+-------------------------------------------------------+
The Netflix Standard vs Social Media Captions
Broadcast network standards prioritize unobtrusive reading. Streaming platforms like Netflix, HBO, and BBC want subtitles to complement the image, not dominate it.
Short-form video assets on TikTok, Instagram Reels, and YouTube Shorts operate under different expectations. As noted in Netflix Supplemental Marketing Assets Guidelines [5], viewers watching promotional or social content tolerate dense captions and faster reading speeds. In vertical 9:16 video editing, stylized captions often use larger centered fonts, sometimes pushing up to three lines per card [6].
However, bad number formatting still hurts your retention. Seeing "twelve thousand four hundred and fifty-two dollars" plastered across four animated lines distracts from your speaker's message. Clean numbers keep the focus on the story.
Character Limits and Line Caps
To maintain high readability across mobile displays and television screens, you must track character-per-line (CPL) counts across your timeline.
| Platform / Medium | Max Lines | Characters Per Line (CPL) | Target Reading Speed |
|---|---|---|---|
| Broadcast Television (BBC) | 2 lines | 32–37 characters | 160–180 Words Per Minute |
| Streaming Video (Netflix) | 2 lines | 37–42 characters | 17 character-per-second cap |
| Social Shorts / Reels (9:16) | 1–3 lines | 15–25 characters | High tolerance / Dynamic |
When automated transcription tools run inside Adobe Premiere Pro, they frequently generate lines with 55 or 60 characters [1]. That forces the viewer's eyes to track across the entire screen. By capping CPL at 42 characters, you keep the viewer focused on the center of the visual composition.
[[STAT:42 characters:max line limit:in broadcast subtitles]]
Actionable Takeaway: Set your caption track specifications in Premiere Pro to a maximum of 42 characters per line and two lines per card before starting your text cleanup.
Formatting Numbers from Zero to Infinity Without Cluttering the Screen
In audio-to-text workflows, numbers present an immediate challenge. Should you write "7" or "seven"? Should you format "1000000" as "1,000,000" or "one million"?
The universal rule across professional subtitling manuals—including the Netflix English UK Timed Text Style Guide [2]—is straightforward. Spell out numbers zero through ten as words. Use digits for numbers 11 and higher.
The Zero to Ten Rule
Spelling out single-digit numbers prevents visual confusion with letters like 'I' or 'O'. It keeps dialogue reading naturally as narrative text.
- Incorrect: We ordered 3 pizzas for the 4 of us.
- Correct: We ordered three pizzas for the four of us [2].
- Incorrect: She edited eleven episodes in 7 days.
- Correct: She edited 11 episodes in seven days [2].
There are a few key exceptions to this rule. When a single sentence contains a series of numbers where some are under 10 and others are over 10, use digits for all of them. For example: "We sold 5 microphones, 12 cables, and 20 stand mounts." It maintains visual consistency.
Handling Numbers at the Start of Sentences
Starting a sentence with a digit looks awkward on screen. It breaks standard typography rules. If a spoken sentence begins with a number higher than ten, you have two choices: spell the number out in full, or rephrase the caption timing.
- Incorrect: 15 editors joined the agency last month.
- Correct: Fifteen editors joined the agency last month [4].
What if spelling out the number creates a giant block of text like "Four hundred and fifty-seven people attended"? Adjust your subtitle split point. Break the subtitle card right before the verb or preposition so the number sits comfortably inside the line structure [7].
Decades and Historical Eras
When speakers reference specific historical periods or decades, use numerals followed by a lowercase 's' without an apostrophe.
- Incorrect: He was born in the nineteen eighties.
- Incorrect: She loved '80's synth music.
- Correct: He was born in the 1980s [4].
- Correct: She loved '80s synth music [4].
If the century is implied by spoken dialogue, place an apostrophe before the decade number to indicate the missing century digits [4]. Write "the '90s" instead of "the 90s". Never place an apostrophe between the zero and the 's'. Writing "1990's" indicates possessive form, which is grammatically incorrect for a decade.
| 50|11+ Digits | 0 |
|---|
Pro Tip: When dealing with large round numbers like "5 million" or "3 billion", combine digits with spelled-out scale words. Writing "$5,000,000" takes up nine characters, whereas "$5 million" takes up nine characters but is significantly easier for viewers to scan in a fraction of a second.
Actionable Takeaway: Audit your sequence text for numbers zero to ten and convert them to words, while making sure all decades omit the possessive apostrophe.
Spoken Dates and Decades: How to Strip Redundant Spoken Words
Speakers rarely talk like written prose. In everyday conversation, people add extra prepositions, articles, and filler words when stating dates. A podcast guest might say, "We launched the company on the fourth of July back in twenty twenty-one."
If you transcribe that sentence verbatim, you waste valuable screen space on conversational fluff. How do you trim the fat without losing the meaning?
Removing Conversational Fillers from Dates
Professional subtitling guidelines dictate that dates should follow spoken order while dropping redundant words like 'the' and 'of'. As detailed in the Netflix English USA Timed Text Style Guide [4], captions should condense spoken speech into crisp dates.
- Spoken Dialogue: "I'll see you on the 12th of May."
- Verbatim Transcript (Wrong): I'll see you on the 12th of May.
- Formatted Subtitle (Correct): I'll see you on May 12th [4]. (Or "12th May" for UK regional style).
By stripping "the" and "of", you save six characters. On a 32-character line limit, six characters represents nearly 20% of your available horizontal space.
Numerical vs Word Ordinals
When a month is explicitly named alongside a day, write the day as a cardinal number or ordinal abbreviation depending on the target style guide.
- US Style Standard: March 6th or March 6 [4].
- UK Style Standard: 6th March or 6 March [2].
If the speaker mentions a day without stating the month (for example, "We are meeting on the fifth"), spell out the number or use an ordinal digit based on context. Writing "We are meeting on the 5th" keeps the caption clean.
+-------------------------------------------------------------------+
| SPOKEN DIALOGUE vs FORMATTED CAPTION |
+-------------------------------------------------------------------+
| Spoken: "We wrapped filming on the twenty-first of October." |
| Verbatim: We wrapped filming on the 21st of October. |
| Cleaned: We wrapped filming on October 21st. |
+-------------------------------------------------------------------+
For broader guidance on managing speech transcripts in video workflows, check out our guide on how to clean up podcast transcripts for Premiere Pro [1].
Actionable Takeaway: Scan your transcript for phrases like "the [day] of [month]" and delete "the" and "of" to shorten line lengths without losing dialogue meaning.
Handling Currency in Subtitles for Global Audiences
Currency formatting trips up even experienced editors. When editing international interviews or financial podcasts, you'll hear guests throw out amounts in US Dollars, Euros, British Pounds, or Japanese Yen.
The primary directive from the Netflix Timed Text General Requirements [3] is absolute: never convert spoken monetary values into local viewing currencies.
Preserving Original Spoken Currencies
If a guest on a tech podcast says, "We raised 50 million dollars in Silicon Valley," the subtitle must reflect US Dollars. You must never convert that figure to 46 million Euros or 39 million British Pounds for localized audience releases [3]. Converting values changes the original context of the dialogue.
Use standard currency symbols ($10, £50, €100) when monetary amounts are simple and clear [2].
- Spoken: "It cost me twenty bucks."
- Correct Subtitle: It cost me $20 [2]. (Or "twenty bucks" if colloquial voice is critical to the character).
- Spoken: "We spent five hundred thousand euros on R&D."
- Correct Subtitle: We spent €500,000 on R&D [3].
Symbol Placement vs Spoken Currency Names
Avoid combining currency symbols with written currency names. Writing "$50 dollars" is redundant—it reads as "fifty dollars dollars."
- Incorrect: The subscription costs $19.99 dollars a month.
- Correct: The subscription costs $19.99 a month [3].
- Correct: The subscription costs 20 dollars a month.
If the currency spoken is obscure or lacks a universal single-character symbol, spell out the currency name after the digit (e.g., "5,000 Swiss francs" or "100,000 INR") [10].
+-------------------------------------------------------+
| CURRENCY FORMATTING CHECKLIST |
| |
| [ ] Preserved original currency spoken in audio |
| [ ] Used standard symbols ($, £, €) where applicable |
| [ ] Removed redundant words (e.g., deleted 'dollars') |
| [ ] Placed symbol before numerals without spaces |
+-------------------------------------------------------+
Actionable Takeaway: Replace written currency names with standard symbols ($50, €100) and strip out redundant words like "dollars" or "bucks" to save screen space.
Exact Time Formatting: A.M., P.M., and Twenty-Four Hour Clock Rules
Time formatting requires precise attention to lowercase periods, spacing, and colons. Leaving times formatted as "9 AM" or "nine thirty p.m" looks inconsistent across a timeline.
Standardizing Lowercase Period Styling
According to the Netflix English USA Timed Text Style Guide [4], exact times of day should use numerals accompanied by lowercase 'a.m.' or 'p.m.' with periods after each letter.
- Incorrect: The call is scheduled for 9:30 AM.
- Incorrect: The call is scheduled for nine thirty A.M.
- Correct: The call is scheduled for 9:30 a.m. [4].
- Correct: The call is scheduled for 11:00 p.m. [4].
When referring to whole hours without specific minutes, omit the double zeros unless exact precision is intended by the speaker.
- Spoken: "I wake up at eight in the morning."
- Correct Subtitle: I wake up at 8 a.m. [4].
If the speaker says "eight o'clock," write out "eight o'clock" as words rather than using digits [2].
Military and 24-Hour Time Conventions
In military, aviation, or European documentary contexts, dialogue may reference 24-hour time formats. The BBC Subtitle Style Guide [9] recommends formatting 24-hour time without a.m./p.m. designators, using colons to separate hours and minutes.
- Military Spoken: "Target acquired at zero nine hundred hours."
- Subtitle: Target acquired at 09:00 hours [9].
- European Standard: The train departs at 21:30 [10].
Pro Tip: Never mix 12-hour and 24-hour conventions. Writing "21:30 p.m." is a common mistake that confuses international viewers.
Actionable Takeaway: Standardize all times in your sequence to use numerals alongside lowercase 'a.m.' and 'p.m.' with internal periods.
Line Breaks, Frame Gaps, and Spatial Formatting in Premiere Pro
Formatting numbers and dates correctly is only half the battle. If your line breaks cut sentences in awkward places, viewers will still stumble over your captions.
Linguistic Line Breaking Rules
When a subtitle event spans two lines, the break must occur at a natural linguistic boundary. Never break a line between words that form a single grammatical unit [7].
As documented in Capital Captions Subtitling Guidelines [7], you must follow these line-breaking principles:
- Never split a first name from a last name:
- Bad: We interviewed Steven / Sparks on set.
- Good: We interviewed / Steven Sparks on set [7].
- Never split an article from its noun:
- Bad: She bought the / camera yesterday.
- Good: She bought / the camera yesterday [7].
- Never split a preposition from its phrase:
- Bad: He walked into / the studio room.
- Good: He walked / into the studio room [7].
Always break after punctuation marks (commas, periods, semicolons) or immediately before conjunctions ("and", "but", "because") [7].
+-------------------------------------------------------+
| BAD LINE BREAK (Splits noun phrase): |
| We are editing the new podcast episode in Adobe |
| Premiere Pro today. |
| |
| GOOD LINE BREAK (Breaks at natural clause): |
| We are editing the new podcast episode |
| in Adobe Premiere Pro today. |
+-------------------------------------------------------+
Preventing Visual Flicker with Frame Gaps
When consecutive captions touch end-to-end on your timeline, screen transitions create visual flicker. The viewer's eyes register the text flickering off and on across shot cuts, causing visual fatigue.
According to the Netflix Manual de Legendagem [8] and general streaming requirements [5], you should maintain a gap of 2 to 4 frames (roughly 125ms to 250ms at 24fps) between consecutive subtitle events.
Timeline View (24fps Sequence):
[ Caption Card 1 (00:01:00:00 - 00:01:03:12) ] <-- 3 Frame Gap --> [ Caption Card 2 (00:01:03:15 - 00:01:06:00) ]
Leaving this 3-frame gap allows the viewer's brain to register that a new caption card has appeared on screen [8].
Actionable Takeaway: Manually inspect your multi-line captions in Premiere Pro to ensure line breaks fall on punctuation or prepositions, and leave a 3-frame gap between adjacent subtitle blocks.
How to Format Dates, Times, and Currency in Subtitles Automatically with CaptionFlow
If you edit long-form interviews, podcasts, or client videos every day, manually adjusting numbers, dates, currency symbols, and frame gaps across 4,000 lines of dialogue takes hours. I used to spend entire afternoons scrubbing through Premiere Pro captions just to fix lowercase "a.m." periods and line splits.
That is why we built KreateFlo CaptionFlow, an AI-powered Adobe Premiere Pro plugin (CEP extension v1.0.3) designed specifically for video editors.
| Before | 4 hours |
|---|---|
| After | 90 seconds |
Eliminating Manual Editing with WASM Real-Time Previews
Instead of bouncing your project out to web apps like Descript or paying per-hour transcription fees on FireCut, KreateFlo runs directly inside your Premiere Pro panel.
With CaptionFlow, you select your caption track and apply broadcast styling rules automatically. The plugin converts numbers zero through ten to words, formats dates without filler words, standardizes currency symbols, and applies linguistic line breaking in 90 seconds instead of 4 hours of manual labor.
+-------------------------------------------------------+
| KREATEFLO CAPTIONFLOW PANEL (v1.0.3 CEP Extension) |
| |
| Presets: [ 22 Animated WASM Styling Presets v ] |
| Rules: [x] Zero-to-Ten Rule |
| [x] Currency Symbol Conversion |
| [x] Date Clutter Removal ('the', 'of') |
| CPL Cap: [ 42 Characters Max ] |
| |
| [ ACTION: Apply Broadcast Formatting to Sequence ] |
+-------------------------------------------------------+
CaptionFlow includes 22 animated caption presets driven by a WebAssembly (WASM) rendering engine. You get instant real-time previews on your timeline—no rendering loop needed just to see how your text styles look.
KreateFlo bundles over 33 professional editing tools into one extension. You get AI multi-cam editing for up to 8 speakers with dedicated wide-shot designation, silence removal, filler word cleanup, and auto-reframing for short-form video assets.
When KreateFlo Isn't the Right Fit
We build tools for editors who live in Adobe Premiere Pro, but KreateFlo is not for everyone. Trust matters more than hype, so here is when you should look elsewhere:
- If you edit in Final Cut Pro or DaVinci Resolve: KreateFlo is a CEP extension built exclusively for Adobe Premiere Pro. It will not load in other NLEs.
- If you prefer web-based standalone apps: Tools like Descript or Opus Clip run in the browser. If you want a browser workflow rather than an NLE plugin, KreateFlo is not the right choice.
- If you need unlimited AI cloud compute for free: KreateFlo offers a Free tier with 3 tools forever (Silence Remover, Transition Assistant, Copy & Paste). Our Pro tier is $19.99/mo with 20 AI hours, and our Studio tier is $44.99/mo with 50 AI hours. If you burn through hundreds of AI transcription hours per month without a budget, cloud plugins will cost you.
For editors producing 5 to 30 hours of podcast content per week, paying $19.99/mo inside Premiere Pro is drastically cheaper and faster than paying per-hour fees on competing plugins like AutoPod or Phantom Editor.
Comparison of Subtitle Formatting Methods
To help you decide how to handle your caption pipeline, here is how manual Premiere Pro editing compares to external web apps and KreateFlo's integrated workflow.
| Feature / Metric | Manual Premiere Pro Editing | External Web Apps (Descript / Opus) | KreateFlo CaptionFlow Plugin |
|---|---|---|---|
| Workflow Location | Native Premiere Timeline | External Browser / App | Native Premiere CEP Extension |
| Turnaround Time (1hr Podcast) | 3 to 4 Hours | 30 to 45 Minutes (Export/Import) | 90 Seconds |
| Zero-to-Ten Number Rule | Manual Text Editing | Partial AI Automation | Automatic Rule Engine |
| Currency & Date Cleanup | Manual Text Editing | Inconsistent | Automatic Rule Engine |
| Real-Time Style Preview | Native Graphics Panel | Browser Render | WASM Real-Time Preview (22 Presets) |
| Pricing Model | Included with Adobe | $15–$30/mo (Cloud Locking) | Free Tier / $19.99/mo Pro (20 AI Hrs) |
Conclusion
Formatting dates, times, and currency manually in Premiere Pro burns time you could spend on story edits, audio mixing, or color grading. By establishing clear rules—spelling out numbers zero to ten, preserving original spoken currency, stripping date clutter, and enforcing 42-character line limits—you ensure your videos look clean across any screen.
If you want to automate broadcast-grade caption styling without bouncing between separate web tools, check out how CaptionFlow speeds up your subtitle workflow. You can download KreateFlo today and try out our free tools right inside Premiere Pro.
Frequently Asked Questions
When should numbers be spelled out vs. written as digits in video subtitles?
Numbers zero through ten should generally be spelled out as words ('one', 'seven') [2]. Numbers 11 and above should be written as digits ('12', '100'), unless the number opens a sentence [2]. If a sentence contains a mixed list of numbers under and over ten, use digits for all of them to maintain visual consistency.
How do major platforms like Netflix format dates and times in closed captions?
Netflix requires stripping redundant spoken words like 'the' and 'of' from dates (e.g., 'July 4th' instead of 'the 4th of July') [4]. Exact times use numerals accompanied by lowercase 'a.m.' and 'p.m.' with internal periods (e.g., '8:30 a.m.') [4].
Should monetary amounts in video subtitles be converted to local currencies?
No. Subtitles must always preserve the original currency spoken in the dialogue [3]. Converting monetary values distorts the original context and can make subsequent spoken lines confusing to international viewers.
What are the character-per-line and display time rules for professional subtitles?
Standard broadcast and streaming subtitles allow 32 to 42 characters per line with a maximum of two lines per subtitle card [5]. Minimum display duration is 5/6 of a second, with maximum duration capped at 6 to 7 seconds per card [3].
How do you correctly format a.m. and p.m. in English subtitles?
Use numerals followed by lowercase letters separated by periods: 'a.m.' and 'p.m.' (for example, '10:15 a.m.') [4]. Avoid uppercase 'AM/PM' unless specifically required by a client's custom brand style guide.
References
- youtube.com/watch
- partnerhelp.netflixstudios.com/hc/en-us/articles/30806198616339-English-UK-Timed-Text-Style-Guide
- partnerhelp.netflixstudios.com/hc/en-us/articles/215758617-Timed-Text-Style-Guide-General-Requirements
- partnerhelp.netflixstudios.com/hc/en-us/articles/217350977-English-USA-Timed-Text-Style-Guide
- partnerhelp.netflixstudios.com/hc/en-us/articles/115000239632-Timed-Text-Style-Guide-Product-Supplemental-Marketing-Assets
- partnerhelp.netflixstudios.com/hc/en-us/articles/219375728-Timed-Text-Style-Guide-Subtitle-Templates
- capitalcaptions.com/services/subtitle-services-2/capital-captions-standard-subtitling-guidelines/
- scribd.com/document/590832898/MANUAL-DE-LEGENDAGEM-NETFLIX
- broadcastwriter.com/2024/12/12/bbc-subtitle-style-guide-2024/
- samtext.com/services/translation-agency/audiovisual-text/subtitling-guidelines/
- aberdeen.io/blog/2008/10/13/transcription-guidelines-for-captioning/
- avtpro.ooona.net/wp-content/uploads/2024/03/AVTpro_StyleGuide_Es-Es.pdf
- gotranscript.com/en/blog/global-date-number-standards-time-zones-currency-consistency-checklist
- avtpro.ooona.net/wp-content/uploads/2025/05/AVTpro_StyleGuide_Zh-Can.pdf
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