How To Count Characters

A character count is the length of a piece of text measured in characters rather than in words. Every letter, digit, punctuation mark, space and line break contributes one, so it is a stricter and more mechanical measure than a word count.

Spaces count. This is the single fact that catches people out, because a headline that looks comfortably short can cross a limit once the spaces between its words are included. Tools that report a count without spaces are answering a different question.

Character limits are everywhere online. An SEO title is truncated by search engines at roughly 60 characters, a meta description at about 160, an SMS segment at 160, an X post at 280, an Instagram caption at 2,200 and a LinkedIn post at 3,000.

The limits exist for different reasons. An SMS limit comes from the fixed size of a signalling message, a social limit is a product decision, and a search limit reflects how much of a title a results page will display before cutting it off with an ellipsis.

Being cut off is not the same as being rejected. A search engine quietly truncates a long title, while a form that enforces a limit may refuse to accept the text at all. Knowing which one applies tells you whether the limit is a target or a wall.

Counting gets subtle for characters outside the basic Latin set. A modern system stores text in UTF-8 on disk but measures length in UTF-16 code units in JavaScript, and the two disagree for anything above the basic multilingual plane.

An emoji such as a grinning face sits above the basic multilingual plane and takes two UTF-16 code units, so JavaScript reports it as two characters even though it looks like one symbol. A family emoji built from several joined characters can count as seven or more.

Accented letters are usually a single code point and therefore a single character, but a letter with a combining accent mark is two code points that render as one glyph. Whether that counts as one or two depends on whether the tool normalises the text first.

SMS is a special case worth knowing. A message written entirely in the GSM-7 alphabet fits 160 characters, but a single character outside that alphabet, such as a curly apostrophe or an emoji, switches the whole message to the smaller UCS-2 encoding and cuts the limit to 70.

Because of that switch, a single emoji can turn a 160-character message into three or four billed segments. The character count of the text has not changed much, but the cost of sending it has.

Line breaks count as characters too. A two-line caption contains a newline, which occupies a position in the string even though it prints as nothing. On some platforms a newline counts as two, because the underlying sequence is a carriage return and a line feed.

The relationship between characters and words is loose. English averages about five and a half characters per word including the space, but the ratio swings from four for short common words to nine or ten for technical vocabulary.

The calculator counts the characters with and without spaces, lists the words and lines, and checks the text against the common platform limits. Each limit shows how much room is left or how far over the text has run.