Unconfuse · Free
Affect vs. Effect: What's the Difference?
Quick answer
- Affect is usually a verb meaning to influence something.
- Effect is usually a noun meaning the result of something.
The difference
Affect is the action; effect is what the action produces. If you can put “the”, “an” or “no” in front of the word, you almost certainly want effect. If the sentence needs something to happen, you want affect.
Affect
- Usually
- verb
- Think
- influence
- Meaning
- To influence something or produce a change in it.
- Example
- The weather affected our plans.
Effect
- Usually
- noun
- Think
- result
- Meaning
- The result or consequence of a change.
- Example
- The change had an immediate effect.
When to use affect
Use affect when one thing acts on another. It takes an object: something affects something else.
- Rising rents affect every small business on the street.
- Did the delay affect your flight?
When to use effect
Use effect when you are naming the result. It usually follows a, an, the, no, little or side.
- The new lighting had a calming effect on the room.
- Caffeine has almost no effect on me after lunch.
Remember it
Affect = Action. Effect = End result.
This covers the everyday cases. There is a rarer verb “to effect” (to bring something about, as in effect change) and a rarer noun “affect” used in psychology for visible emotion.
Common mix-up
Incorrect: The new policy had a positive affect.
Correct: The new policy had a positive effect.
“A positive ___” needs a noun, and the noun is effect.
Incorrect: The delay didn't effect the outcome.
Correct: The delay didn't affect the outcome.
Here something acts on something else, so you need the verb affect.
The difference in real life
Effect as a verb
“Effect change” means to bring change about. It is formal and deliberate, if you are not sure you mean it, you probably want affect.
Free
Think you've got it?
The medication had an immediate _____.
Loud offices _____ how well people concentrate.
Which sentence is correct?
The board wants to _____ real change this year.
Look these up
You might also confuse
Now use it for real
Real-World Practice puts words into the situations you actually meet, free, no AI credits.
Try Real-World Practice