Effect vs Impact

When to use each in English, with meaning, register, and examples.

	Effect	Impact
Meaning	A change that is caused by something.	The strong effect or change that something has on something else.
CEFR level	A2	B1
Part of speech	noun	noun
Usage notes	Use 'effect' to refer to results or changes. It's more formal than 'result.' Avoid using it where 'affect' (to influence) fits better.	Use 'impact' when describing the effect of one thing on another. It's suitable for both spoken and written contexts, but avoid using it in highly formal situations like academic papers. In casual conversation, synonyms like 'effect' might be more appropriate.

Frequently asked questions: Effect vs Impact

What's the difference between "Effect" and "Impact"?

"Effect" means: A change that is caused by something. "Impact" means: The strong effect or change that something has on something else.

When should I use "Effect" and "Impact"?

They can all be used in everyday English.

Are "Effect" and "Impact" the same CEFR level?

"Effect" is at A2, "Impact" is at B1 on the CEFR scale.