About vs Upon

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

About

Top 1,000 (very common)A1preposition

Upon

FormalBeyond 10,000 (less common)B1preposition
Most formal: UponMost common: About
 AboutUpon
Pronunciation🇬🇧 /["/əˈbaʊt/"]/🇺🇸 /["/əˈbaʊt/"]/🇬🇧 /["/əˈpɒn/"]/🇺🇸 /["/əˈpɑːn/"]/
MeaningConcerning or in relation to something.on or at a particular time or place
ExampleI read a book about nature.mile upon mile of dusty road
RegisterNeutralFormal
How commonTop 1,000 (very common)Beyond 10,000 (less common)
CEFR levelA1B1
Part of speechprepositionpreposition
Collocationstalk about, think about, worry about, know about, care aboutupon arrival, upon request, upon reflection, upon hearing, upon completion
Antonymsaway, beyondafter, below, underneath
Common mistakesConfusing 'about' with 'around' in certain contexts., Using 'about' when 'regarding' would be more formal., Using 'about' in place of 'approximately' for numerical values.Confused with 'on' in casual speech., Used inappropriately in informal settings., Misunderstood as a preposition that can replace any instance of 'on'.
Usage notesUse 'about' when discussing topics or subjects. It's versatile in both spoken and written English, but informal expressions may avoid it in academic texts.Used in more formal contexts, often in writing. Not commonly used in everyday spoken English. Avoid in casual conversations.

Frequently asked questions: About vs Upon

What's the difference between About and Upon?

About: Concerning or in relation to something. Upon: on or at a particular time or place

Which is more formal: About and Upon?

Upon is the most formal of these.

Which is more common: About and Upon?

About is the most common in everyday English.

Are About and Upon the same CEFR level?

About: A1, Upon: B1 on the CEFR scale.

Can I use About and Upon interchangeably?

Not always. About and Upon 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.

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