Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
12
Grammar usage guide and real-world examplesUSAGE SUMMARY
The word "12" is correct and usable in written English.
It is generally used as a number, though there may be some contexts where it can also be used as a word. For example, you could say, "I will be arriving at twelve o'clock."
✓ Grammatically correct
News & Media
Formal & Business
Science
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
42 human-written examples
Scheduled to make the 1,492km 9277 miles) journey every day except Christmas Day, the A320 plane has seen passengers delayed for as little as two minutes and as long as 12 hours and 18 minutes.
News & Media
For the first 12 years it was the plain old Terry Wogan Show and you were all Twits, the Terry Wogan is Tops Society.
News & Media
(Howard) 25. (Reagan Arthur) 26.
News & Media
The course will have places for 12 participants who will meet for one three-hour session per week (6.30pm - 9.30pm) for a period of six months at the Guardian Building, 90 York Way, Kings Cross, London N1 9GU.
News & Media
Gray died a week after he was arrested on 12 April, then handcuffed and shackled in the back of a police van without a seatbelt.
News & Media
The course will have places for 12 participants who will meet for one three-hour session per week (6.30pm-9.30pm) for a period of six months at the Guardian building at Kings Place, London N1 9GU.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
18 human-written examples
First and foremost, there is the need for a comprehensive spending review for 2011/12 onwards.
News & Media
It has been created by Thorntons to mark the company's 100th birthday and, after months of top-secret cooking, the 5,792.5kg (12,770lb) treat was unveiled to staff and visitors at the confectioner's headquarters in Alfreton, Derbyshire, on Wednesday.
News & Media
Beware: no wetsuits allowed … From £12, 2 February, chillswim.com Discover Adventure has a new challenge for 2013: a nine-day coast-to-coast ride from the Atlantic to the Mediterranean across the Pyrenees.
News & Media
In a 300-less world, Man of Steel might have been directed by someone who wasn't an angry 12-year-old boy.
News & Media
The old collection of buildings that made up the original concentration camp was not big enough to house all those caught in mass arrests, so inmates were forced to work 12- to 15-hour days to construct a new camp next door that would become notorious as the Nazis' biggest death camp.
News & Media
Expert writing Tips
Best practice
When writing about numbers, be consistent in your style. If you write out numbers below ten, use numerals for "12" and above. Consider context (formal/informal) when determining whether to spell out "twelve" or use "12".
Common error
Avoid mixing numerals and spelled-out numbers within the same context unless there's a clear reason to do so. Choose one format and stick to it for consistency and clarity.
Source & Trust
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The primary grammatical function of "12" is as a numeral, specifically a cardinal number. It quantifies nouns, indicating a specific count, as shown in Ludwig's examples such as "12 months" or "12 participants".
Frequent in
News & Media
57%
Formal & Business
25%
Science
18%
Less common in
Academia
0%
Encyclopedias
0%
Wiki
0%
Ludwig's WRAP-UP
In summary, "12" functions primarily as a numeral to denote the quantity twelve. As confirmed by Ludwig AI, it's grammatically correct and widely used across various contexts, predominantly in news and media. When writing, maintain consistency in number formatting and be mindful of the level of formality required. For related concepts, consider using "dozen" when referring to a group of twelve items.
Alternative expressions
Phrases that express similar concepts, ordered by semantic similarity:
dozen
Replaces the numerical value with a collective noun for twelve items.
twelve units
Adds specificity by explicitly stating the units being counted.
a group of twelve
Emphasizes the collective aspect of the number.
a dozen items
Specifies that it refers to items rather than another type of count.
twelve individuals
Emphasizes the individual nature of the quantity
one dozen
Uses the numerical "one" to state the quantity.
FAQs
How do I use "12" in a sentence?
Use "12" as a numeral to represent the number twelve. For example, "There are 12 months in a year".
When should I spell out "twelve" instead of using "12"?
Generally, spell out numbers one through nine. Use numerals for 10 and above unless it's at the beginning of a sentence or in formal writing where spelling out all numbers is preferred. For example, "Twelve students attended the seminar".
What are some synonyms for "12"?
A synonym for "12" is "dozen", which specifically refers to a group of twelve items.
Is it ever incorrect to use "12" in written English?
It's rarely incorrect to use "12", but context matters. In highly formal writing, you might spell it out. Ensure it's clear and consistent with your chosen style guide.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested