Customisable and customizable are both correct spellings. The main difference is the variety of English in which they are used. Customizable is the standard spelling in American English, while customisable is commonly used in British English and other varieties that follow British spelling conventions.
Both words have the same meaning. They describe something that can be changed, adjusted, or modified according to someone’s needs, preferences, or requirements.
For example, a website may offer a customizable design that allows users to change colours, layouts, and settings. In British English, the same sentence would use customisable.
The difference comes from the spelling of the suffix -able and the treatment of the letter s or z in words such as customize and customise. Understanding this regional spelling difference will help you choose the correct form for your audience.
Customisable or Customizable : Quick Answer
Both customisable and customizable are correct.
- Customizable is the preferred spelling in American English.
- Customisable is the preferred spelling in British English.
- Both words mean capable of being changed or adjusted to meet individual preferences.
Examples:
- The software offers a customizable dashboard. (American English)
- The software offers a customisable dashboard. (British English)
Neither spelling is incorrect. The right choice depends on your target audience and the English spelling style you follow.
Definition and Meaning of Customizable
Customizable means that something can be changed, modified, or adjusted according to personal preferences or specific needs.
It is formed from the verb customize by adding the suffix -able. The suffix -able means capable of or suitable for a particular action.
For example, a customizable phone allows users to change its wallpaper, display settings, icons, and other features.
The word is commonly used in technology, business, design, fashion, education, and product descriptions.
Examples:
- The application has a customizable interface.
- Customers can choose a customizable gift box.
- This website offers customizable templates.
- The company provides customizable furniture for small apartments.
- Users can create a customizable profile.
When to Use Customizable
Use customizable when writing in American English or communicating with an audience that follows American spelling conventions.
It is especially common in:
- Software and technology descriptions
- Online shopping and product listings
- Website design
- Business services
- Marketing materials
- Customer support documents
For example, an American technology company might advertise a customizable mobile application that allows users to change its appearance.
Definition and Meaning of Customisable
Customisable has exactly the same meaning as customizable. It describes something that can be changed or adjusted to suit individual needs, preferences, or requirements.
The difference is spelling, not meaning.
This form is commonly used in British English and other English varieties that follow British spelling conventions.
Examples:
- The website offers a customisable homepage.
- Customers can order customisable products.
- The software includes a customisable menu.
- The company sells customisable office furniture.
- Students can use customisable learning materials.
When to Use Customisable
Use customisable when writing for readers in the United Kingdom or other regions that commonly follow British spelling.
It is suitable for:
- British business websites
- Product descriptions
- Educational materials
- Online services
- Marketing content
- Formal British English documents
For example, a British company may describe its online platform as a customisable service that gives customers more control over their settings.
Origin and History of Customisable and Customizable
Both spellings come from the word custom, which refers to a traditional practice, personal preference, or something made for a particular person.
The word custom has roots in Old French and Latin. Over time, English developed the verb customize, meaning to modify something according to specific requirements.
The suffix -able was added to create customizable and customisable. This suffix changes the verb into an adjective describing something that can receive the action.
The spelling difference developed from the wider distinction between American and British English.
American English commonly uses -ize in words such as:
- Customize
- Organize
- Realize
- Recognize
British English often uses -ise in these words:
- Customise
- Organise
- Realise
- Recognise
However, British English also accepts many -ize spellings, particularly in Oxford English spelling. Therefore, the choice can depend on the style guide being followed.
Customisable vs. Customizable: Main Differences
The main difference between these two words is their regional spelling.
Customizable follows the spelling convention commonly used in American English. Customisable follows the spelling convention commonly used in British English.
Both forms describe products, services, software, or other things that users can modify.
| Feature | Customisable | Customizable |
| English variety | British English | American English |
| Spelling pattern | -ise | -ize |
| Meaning | Can be customized | Can be customized |
| Pronunciation | Same | Same |
| Part of speech | Adjective | Adjective |
| Example | Customisable settings | Customizable settings |
The pronunciation and meaning remain the same. Only the spelling changes.
British English vs. American English Spelling
British and American English often use different spelling conventions. One common difference involves words ending in -ise and -ize.
American English generally prefers -ize, while British English commonly uses -ise in everyday writing.
Here are some related examples:
| British English | American English |
| Customisable | Customizable |
| Customise | Customize |
| Organisable | Organizable |
| Organise | Organize |
| Recognisable | Recognizable |
| Recognise | Recognize |
| Realisable | Realizable |
| Realise | Realize |
One important point is that British English does not always require -ise. Oxford spelling also accepts and often prefers -ize forms.
For this reason, customizable can also appear in British publications that follow Oxford spelling conventions.
Which Spelling Should You Use?
Choosing between customisable and customizable depends on your audience and the spelling style used in your writing.
Use Customisable for British English
Choose customisable when writing for readers in the United Kingdom or audiences that follow traditional British spelling conventions.
Examples:
- Our website offers customisable templates.
- Customers can select customisable furniture.
- The application includes customisable settings.
Use Customizable for American English
Choose customizable when writing for readers in the United States.
Examples:
- The software includes a customizable dashboard.
- Customers can purchase customizable products.
- Our platform offers customizable design options.
Use One Spelling Consistently
If your website, business, or document targets an international audience, select one spelling style and use it consistently.
For American readers, use customizable. For British readers, customisable is a familiar choice.
Avoid switching between both spellings in the same article or document unless you are directly comparing regional English varieties.
Common Mistakes With Customisable and Customizable
Both spellings are correct, but writers sometimes make mistakes when choosing between them.
1. Mixing British and American Spellings
Incorrect: Our website offers customisable templates and customizable designs.
Correct: Our website offers customizable templates and customizable designs.
Why? If you are following American English, use the American spelling consistently.
2. Thinking Customisable Is Incorrect
Incorrect understanding: Customisable is always a spelling mistake.
Correct understanding: Customisable is an accepted British English spelling.
Why? The letter s is part of the British spelling convention for words formed from customise.
3. Thinking Customizable Has a Different Meaning
Incorrect understanding: Customizable describes software, while customisable describes physical products.
Correct understanding: Both words can describe software, products, services, and other items that people can modify to meet their needs or preferences.
Why? The difference is regional spelling, not meaning.
4. Confusing Customizable With Customized
Incorrect: This is a customizable product that has already been changed for me.
Correct: This is a customized product that has already been changed for me.
Why? Customizable describes something that people can change, while customized describes something that someone has already modified.
5. Using Customisable in American-Focused Content
Less suitable: Our platform offers customisable features for American customers.
Better: Our platform offers customizable features for American customers.
Why? American readers generally expect the spelling customizable.
Customisable and Customizable in Everyday Examples
Both spellings are used in many situations, particularly when discussing products, technology, and personal preferences.
Examples With Customisable
- The company offers customisable website designs.
- This application has a customisable homepage.
- Customers can order customisable birthday gifts.
- The platform provides customisable account settings.
- We offer customisable plans for different businesses.
- The school uses customisable learning materials.
Examples With Customizable
- The company offers customizable website designs.
- This application has a customizable homepage.
- Customers can order customizable birthday gifts.
- The platform provides customizable account settings.
- We offer customizable plans for different businesses.
- The school uses customizable learning materials.
The examples have the same meanings. Only the spelling changes to match the preferred English variety.
Customisable vs. Customizable: Comparison Table
| Point | Customisable | Customizable |
| Correct spelling | Yes | Yes |
| Commonly used in | British English | American English |
| Meaning | Capable of being changed | Capable of being changed |
| Pronunciation | Same | Same |
| Word type | Adjective | Adjective |
| Root verb | Customise | Customize |
| Opposite idea | Non-customisable | Non-customizable |
| Example | Customisable options | Customizable options |
Frequently Asked Questions
1. Is Customisable or Customizable Correct?
Both are correct. British English commonly uses customisable, while American English uses customizable as its standard spelling.
2. Is Customisable British or American?
Customisable is the common British English spelling. It uses the letter s instead of z.
3. Is Customizable American English?
Yes.American English prefers customizable, which appears widely in U.S. websites, product descriptions, and business documents.
4. Do Customisable and Customizable Have the Same Meaning?
Both words describe something that people can change, adjust, or modify to suit their personal preferences or specific requirements.
5. How Do You Spell Customizable in the UK?
The common British spelling is customisable. However, customizable is also accepted in British English styles that follow Oxford spelling conventions.
6. What Is the Difference Between Customize and Customizable?
Customize is a verb meaning to change something according to specific needs. Customizable is an adjective describing something that can be changed.
Example: You can customize a customizable website.
7. Is Customizable One Word or Two?
Customizable is one word. It should not be written as two separate words.
Conclusion
Customisable and customizable are both correct English spellings with the same meaning. The main difference is regional preference. Customisable is commonly used in British English, while customizable is preferred in American English.
If you are writing for a US audience, choose customizable. If your readers follow British spelling conventions, use customisable. The most important thing is to maintain consistent spelling throughout your writing.
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I’m an English grammar writer specializing in word usage, spelling, grammar rules, and commonly confused words. I create simple, practical content to help readers understand English better and write with confidence.
