Chunk vs Portion

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

Chunk

Top 2,000 (common)C1noun

Portion

Top 2,000 (common)B2noun
 ChunkPortion
Pronunciation🇬🇧 /["/tʃʌŋk/"]/🇺🇸 /["/tʃʌŋk/"]/🇬🇧 /["/ˈpɔːʃn/"]/🇺🇸 /["/ˈpɔːrʃn/"]/
MeaningA piece or part of something, often large.a part of something larger
Examplea chunk of cheese/masonryI only ate a small portion of the pie, as I wasn't really hungry.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 2,000 (common)
CEFR levelC1B2
Part of speechnounnoun
Collocationsbig, great, huge, cut something (up) into chunks, in a/​the chunk, chunk of, big, great, huge, cut something (up) into chunks, in a/​the chunk, chunk ofconsiderable, good, huge, make up, take up, portion of, double, generous, large, eat, portion of, divide something into portions, considerable, good, huge, make up, take up, portion of
Antonymswhole, entire, fullwhole, entirety, total
Common mistakesConfused with 'hunk' – remember that a chunk can be any size, not just large., Using 'chunk' as a verb incorrectly – it's primarily a noun., Mispronouncing it as 'chank' instead of 'chunk'.Using 'portion' with plural nouns (e.g., 'portions of food' is correct, but don't say 'portion of foods')., Confusing 'portion' with 'proportion', which refers to a ratio., Using 'portion' when referring to an entire object instead of a part.
Usage notesUse 'chunk' in both formal and informal contexts. It's suitable for discussing food, data, or information. Avoid using it in very formal writing.Use 'portion' when you refer to a part of food, quantity, or share. It's neutral and suitable for everyday conversations and formal writing. Avoid using it when discussing something that can't be divided easily.

Frequently asked questions: Chunk vs Portion

What's the difference between Chunk and Portion?

Chunk: A piece or part of something, often large. Portion: a part of something larger

Which is more advanced: Chunk and Portion?

Chunk is the highest level, at C1, on the CEFR scale.

Are Chunk and Portion the same CEFR level?

Chunk: C1, Portion: B2 on the CEFR scale.

What part of speech are Chunk and Portion?

Chunk: noun, Portion: noun.

Can you show an example of each?

Chunk: a chunk of cheese/masonry Portion: I only ate a small portion of the pie, as I wasn't really hungry.

Can I use Chunk and Portion interchangeably?

Not always. Chunk and Portion are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

Related comparisons