Free vs Let

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

Free

Top 1,000 (very common)A1adjective

Let

Top 1,000 (very common)A1verb
 FreeLet
Pronunciation🇬🇧 /["/friː/","/ˈfriːə(r)/","/ˈfriːɪst/"]/🇺🇸 /["/friː/","/ˈfriːər/","/ˈfriːɪst/"]/🇬🇧 /["/let/","/lets/","/ˈletɪŋ/"]/🇺🇸 /["/let/","/lets/","/ˈletɪŋ/"]/
MeaningNot costing money or not being controlled by someone.to allow someone to do something
ExampleThe concert tickets are free for everyone.Let me help you with that bag.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 1,000 (very common)
CEFR levelA1A1
Part of speechadjectiveverb
Collocationsbe, keep something, completely, entirely, totally, be, seem, become, completely, be, come, absolutely, completely, entirely, for free, free of charge, for, be, feel, seem, completely, entirely, quite, from, be, feel, seem, completely, entirely, quite, from, be, roam, run, completely, entirely, totally, be, roam, run, completely, entirely, totally, be, become, remain, completely, entirely, totally, be, roam, run, completely, entirely, totallylet me know, let it go, let someone down, let the cat out of the bag, let off steam
Antonymsexpensive, costlyforbid, prevent, stop
Common mistakesConfused with 'free of' which implies absence instead of no cost., Using with continuous tenses incorrectly, e.g., 'I am freeing my weekend.''Let' vs 'let's': Confusing 'let' (permission) with 'let's' (suggestion)., Incorrect verb form: Forgetting to use the base form after 'let'., Using 'let' with a subject: Say 'let him go' instead of 'let him to go'.
Usage notesUse 'free' in both formal and informal contexts. Avoid using it in a context where it implies lack of value or worth.Use 'let' when giving permission. It's appropriate in both formal and informal contexts, but more common in everyday speech than formal writing.

Frequently asked questions: Free vs Let

What's the difference between Free and Let?

Free: Not costing money or not being controlled by someone. Let: to allow someone to do something

Are Free and Let the same CEFR level?

Free: A1, Let: A1 on the CEFR scale.

Can I use Free and Let interchangeably?

Not always. Free and Let 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.