What context can I use each word in?
Learn when and how to use these words with these examples!
complex
Example
The human brain is a complex organ. [complex: adjective]
Example
The instructions for this game are quite complex. [complex: adjective]
Example
The architect designed a complex building with many levels and features. [complex: adjective]
complicated
Example
The tax code is very complicated. [complicated: adjective]
Example
The process for applying for a visa can be quite complicated. [complicated: adjective]
Example
The project turned out to be more complicated than we anticipated. [complicated: adjective]
Good things to know
Which word is more common?
Complicated is more commonly used than complex in everyday language. Complex is often used in technical or scientific contexts and may not be as familiar to ESL learners.
What’s the difference in the tone of formality between complex and complicated?
Complex is generally more formal than complicated. It is often used in academic or technical writing, while complicated is more versatile and can be used in both formal and informal contexts.
