Consist Of vs. Consist In
Consist Of vs. Consist In separates the composition sense from the formal essential-quality sense documented in Cambridge.
Use consist of for what something is made up of; use formal consist in for what its main or necessary quality consists in.
Key details
Choose the right form
| Meaning / situation | Form / construction | Decision |
|---|---|---|
| state the parts or members that make up a whole | consist of + parts | Use “of” for composition. |
| state the essential feature or basis of something | consist in + noun/-ing | Use formal “in” for what the essence or main quality lies in. |
Quick tests
Meaning / construction test
Are you listing what something is made up of?
If yes: Use “consist of.”
If no: Use formal “consist in” when you mean that the essence or main feature lies in something.
Caveat: “Consist in” is comparatively formal and expresses a different relation from composition; it is not merely a stylistic replacement for “consist of.”
Examples
The committee consists of six members.
“Of” introduces the parts of the whole.
The difficulty consists in finding reliable data.
Formal “in” introduces what the difficulty essentially lies in.
The package consists of three files and a README.
The phrase lists components.
Further guidance
Core difference
Consist of means to be made or formed from specified parts; formal consist in means to have something as a main and necessary part or quality.
Style Boundary
Do not swap the prepositions mechanically: the Cambridge entries define different senses.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- consist of something — Cambridge English Dictionary (opens in a new tab)Cambridge University Press · Dictionary definition of consist of for composition or constituent parts
- consist in something — Cambridge English Dictionary (opens in a new tab)Cambridge University Press · Dictionary definition of consist in for a main or necessary quality/part