Have you heard someone say something is “based off” a book or movie? You may wonder — is that correct, or should it be “based on”? Let’s clear it up! ✅
Based on is the traditional and more formal way to say that one thing uses another as its source or foundation. It’s still the most common and widely accepted form — especially in writing and professional settings.
Based off (or based off of) is a newer and more informal way to say the same thing. You’ll often hear it in spoken English — especially in the U.S. — but some people still think it sounds less correct.
While “based off” is becoming more popular, “based on” is safer to use — especially in school, writing, or professional situations.
📘 Use based on for formal writing, school, and work.
🗣️ “Based off” is casual and common in speech, but some people consider it incorrect.
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