Centre or center is one of the most recognisable differences between British and American English spelling. Both versions are entirely correct within their own context — but they are not interchangeable. If you are writing in British English and you type center, your spell-checker will flag it as an error, and rightly so.
This guide explains the difference clearly, gives you examples across different contexts, and covers the broader pattern of -re versus -er endings in British and American English.
The Quick Answer
Centre is the correct British English spelling — used in the UK, Australia, New Zealand, Ireland and most other countries that follow British English conventions.
Center is the correct American English spelling — used in the United States and Canada.
Both spellings refer to the same thing — the middle point of something, or a place where a particular activity is concentrated. The difference is purely one of spelling convention. Using center in British English writing is an Americanism and would be considered an error in formal or academic contexts.
Centre in British English
In British English, centre — with the -re ending — is the standard and universally expected spelling. It appears throughout official British writing:
NHS treatment centres and health centres
Leisure centres and sports centres
City centres and town centres
Research centres and learning centres
The Centre for Policy Studies
The -re ending is the original French-derived form that British English retained when American English moved toward phonetic simplification. It is deeply embedded in British spelling and is the expected form in all UK formal, academic and professional writing.
Center in American English
In American English, center — with the -er ending — is standard. American spell-checkers flag centre as incorrect, and the -er spelling is used universally in American publications, signage and formal documents.
The shift from -re to -er in American English was part of a broader movement toward simplified, phonetically consistent spelling that took hold in the United States in the eighteenth and nineteenth centuries — most famously championed by lexicographer Noah Webster, whose dictionaries established many of the distinctive American English spelling conventions still in use today.
The Broader -re vs -er Pattern
Centre and center are part of a wider group of words where British English uses -re and American English uses -er. Other common examples include:
Metre / Meter — British: metre (unit of measurement). American: meter. Note: in British English, meter is used for a measuring device (parking meter, gas meter).
All of these follow the same pattern: -re in British English, -er in American English. If you are writing in British English, applying this consistently across the full set of words will significantly improve the accuracy and consistency of your spelling.
Examples in Context
British English — Centre
The new community centre opens next month.
She works at a research centre at the University of Edinburgh.
The city centre was busy throughout the summer.
Place the image in the centre of the page.
The document should be centre-aligned.
American English — Center
The new community center opens next month.
She works at a research center at Harvard University.
The city center was busy throughout the summer.
Place the image in the center of the page.
Common Mistakes in British English
Incorrect: The health center provides a range of NHS services. Correct: The health centre provides a range of NHS services.
Incorrect: The report is center-aligned. Correct: The report is centre-aligned.
Incorrect: Manchester City Center. Correct: Manchester City Centre.
What About Place Names?
Place names are a special case. Always use the official spelling of a place name, regardless of your chosen variety of English. For example:
Lincoln Center in New York City uses the American spelling — use this regardless of whether you are writing in British or American English.
The Barbican Centre in London uses the British spelling — use this in all contexts.
Kennedy Center in Washington DC uses the American spelling as part of its official name.
When referring to a named venue, institution or organisation, always defer to its official spelling. The -re vs -er rule applies to the common noun (a leisure centre, a shopping center) rather than to proper nouns with established official names.
Why Consistency Matters
In academic and professional writing, spelling consistency is a basic quality standard. Mixing centre and center within the same document — or using center throughout a British English essay — suggests either that the writer has not proofread carefully or that they have relied heavily on American sources without adjusting the language.
For UK university students in particular, British English spelling is expected as the default. An essay that consistently uses American spellings will typically be flagged by tutors, and in some cases it may affect your mark for written expression.
If you want to be certain your document uses correct and consistent British English spelling throughout, our professional proofreading service checks every aspect of your writing — including spelling conventions, consistency and accuracy. Our professional copy editing service provides a more comprehensive review covering clarity, structure and tone alongside spelling.
Frequently Asked Questions
Is it centre or center in the UK?
In the UK, centre — with the -re ending — is the correct British English spelling. Center (with -er) is the American English spelling. Using center in a British English document is an Americanism and would be considered an error in formal writing.
Is theatre or theater correct in British English?
In British English, theatre is correct. Theater is the American English spelling. This follows the same -re vs -er pattern as centre/center. British theatres, drama schools and arts organisations all use the -re ending.
Why does American English use -er instead of -re?
The shift from -re to -er in American English was part of a broader spelling simplification movement in the eighteenth and nineteenth centuries, associated with lexicographer Noah Webster. Webster argued that American English spelling should be more phonetically consistent and less reliant on French and Latin conventions. His dictionaries standardised the -er ending, among many other American English spelling conventions.
Is centre-aligned or center-aligned correct in Microsoft Word?
If you are writing in British English, centre-aligned is the correct term. Microsoft Word itself uses “Center” in its interface because the software was developed in the United States. However, when describing alignment in a British English document, centre-aligned is correct. Similarly, the alignment option in Word referred to in British English writing should be described as centre alignment.
Should I use centre or center in a UK university assignment?
Use centre. UK universities expect British English spelling conventions as the default. Consistently using center throughout a UK university assignment would be flagged as a spelling inconsistency.
Summary
Centre is correct in British English
Center is correct in American English
The -re vs -er pattern applies to a whole family of words including theatre, litre, metre and fibre
Always use the official spelling of place names regardless of your chosen variety of English
Consistency throughout your document is essential
Our professional proofreading service ensures your document uses correct and consistent British English spelling throughout — including the full range of -re words that British English writers need to get right.
Colour and color mean exactly the same thing — but only one of them is correct in British English. Using the American spelling color in a UK document is one of the most immediately noticeable Americanisms a writer can make. This guide explains which to use, why they differ, and which other -our words follow the same pattern.
Organisation and organization are both correct spellings — but not in the same context. Using the American spelling in a British English document is one of the most common consistency errors in professional and academic writing. This guide explains which spelling to use and when.
Programme and program are not simply two spellings of the same word — in British English, they have different meanings depending on context. Using the wrong one in a professional or academic document can undermine your credibility as a writer. This guide explains the difference clearly, with examples.
