Instagram character counter

How to write a caption to the right length

Instagram gives you a generous ceiling and a tiny visible window, so the useful discipline is writing to two numbers at once: the opening that shows in the feed, and the whole caption sitting underneath it.

1. 1Draft the caption in full and paste it here. Instagram only shows you a count once you are near the ceiling, which is far too late to plan the shape of the thing.
2. 2Read the first sentence on its own and check it works as a complete thought, because that sentence is all a scrolling reader is given before the "more" link.
3. 3Add the mentions and the hashtag block you actually intend to publish with, not a placeholder. Every one of them is charged at its full typed length.
4. 4Switch to the bio surface and write that separately. At 150 characters it is a different budget entirely, and the version of your pitch that fits a caption will not survive the move.
5. 5Check the number again after the emoji go in. A skin-toned or professional emoji is several code points and one character, and this page counts it the way the reader sees it.
6. 6Copy the finished caption into the app in a single paste, rather than typing the last line in the caption field.

Instagram's ceilings, surface by surface

Three surfaces share a name and almost nothing else. A caption and a comment sit at the same ceiling, the bio sits an order of magnitude below both, and the image description is counted on its own.

• Caption: 2,200 characters. Only the first ~125 characters show before "more".
• Bio: 150 characters. Every character is on screen at once, which makes this the field where counting genuinely changes the sentence you write.
• Comment: 2,200 characters. Worth knowing when you answer in long form on your own post, or pin a first comment carrying the links the caption cannot.
• A link in a caption is plain text. It is not clickable, it is not shortened, and it costs you every character it is long.
• The clickable link on your profile lives in a separate website field, so it does not come out of the bio.
• An @mention is charged with its at sign, and a mention that resolves to nothing still costs the same.
• Alt text is written in its own field on the post, so a long, useful description never competes with the caption.
• The invisible characters that keep paragraph spacing alive through the composer are real characters with a real cost, which is why the spacing tool shows their total.

The count that matters is not the one you hit

The caption that fails on Instagram is almost never the one that runs too long. It is the one whose first sentence is cut mid-phrase by the "more" link, so the thought that would have earned the read arrives as a fragment.

• A family emoji is one character to a reader and eleven UTF-16 code units to a naive counter, so a caption a spreadsheet calls over budget can be comfortably under.
• That same emoji is seven code points, which is why counting code points is closer than counting code units and still not what anybody sees.
• Scheduling tools that count code units warn you early and refuse captions Instagram would have accepted.
• A caption pasted from a document often carries a run of blank lines at the end. They count here and are usually trimmed on publish, which is one honest source of a small disagreement.

Where counting stops helping

There is a point where counting becomes procrastination, and on Instagram it arrives early: hardly anybody writes to the ceiling, and the people who do are writing something the ceiling was never the constraint on.

• Count the bio properly. 150 characters is a real constraint, and rewriting to fit it changes what you say rather than how you say it.
• For an ordinary caption, check the opening sentence and ignore the total.
• If you are near the ceiling, the caption is probably a carousel or a blog post wearing a caption's clothes.
• The count says nothing about whether the caption is worth reading, and no widget on this page can.