Duration vs Span

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

 DurationSpan
MeaningThe length of time something lasts.To stretch across or cover an area.
CEFR levelB2C1
Part of speechnounverb
Usage notesCommonly used in both formal and informal contexts. Refers to time periods, such as how long a movie is or how long an event lasts. Avoid using it in very casual conversations.Use 'span' to describe distance, duration, or extent. More common in technical or descriptive contexts. Avoid in very casual conversation.

Frequently asked questions: Duration vs Span

What's the difference between "Duration" and "Span"?

"Duration" means: The length of time something lasts. "Span" means: To stretch across or cover an area.

When should I use "Duration" and "Span"?

They can all be used in everyday English.

Are "Duration" and "Span" the same CEFR level?

"Duration" is at B2, "Span" is at C1 on the CEFR scale.

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