Instagram caption character limit and where 2,200 comes from

The number appears in the description of the caption parameter in Meta's IG User Media reference. The line there reads "Maximum 2200 characters, 30 hashtags, and 20 @ tags." That reference is written for developers whose apps publish through the API. It describes what the API accepts, so the Instagram app's own rules may be different.

By default, the counter counts visible characters, so the total follows what you see on screen. An emoji counts as one character, even when it's built from several parts, like a person with a skin tone. Each line break counts as one character, and so does each space, unless you turn off Include whitespace in character count.

None of the sources here say how the app counts line breaks, emoji, or links. That's the part to double check, since the counter's default rule is clear and the app's isn't. A link counts as the characters you typed, and the app may treat it differently.

The counter has limits of its own. It doesn't apply any hashtag or @ mention rule, so the hashtag and tag numbers in the quote stay untested here. It can't show where a feed shortens a long caption, because we found no official page that gives that point. It also doesn't post anything.

Leave room below 2,200 instead of writing right up to the number. Paste the final caption into Instagram before you post, because the app has the last say on what it accepts.

Don't read the hashtag or @ tag numbers from the quote as the rule your post has to follow. They describe what the API reference says, not what the app allows today.