Quantity vs Sum

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

 QuantitySum
MeaningHow much of something there is.The total amount when you add numbers together.
CEFR levelA2B2
Part of speechnounnoun
Usage notesUsed in contexts relating to amounts, measurements, or counts. Common in both spoken and written English.Use 'sum' in mathematics or when discussing totals. It's neutral in register, suitable for both formal and informal contexts. Avoid using it in non-numerical discussions.

Frequently asked questions: Quantity vs Sum

What's the difference between "Quantity" and "Sum"?

"Quantity" means: How much of something there is. "Sum" means: The total amount when you add numbers together.

When should I use "Quantity" and "Sum"?

They can all be used in everyday English.

Are "Quantity" and "Sum" the same CEFR level?

"Quantity" is at A2, "Sum" is at B2 on the CEFR scale.

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