Medium Mathematical Space is the gap that belongs around a mathematical operator. It is defined as exactly four eighteenths of an em, a fraction that comes straight from the spacing rules TeX uses to set equations.
Click the button above to copy Medium Mathematical Space, then paste it wherever you need it. Nothing will appear on your clipboard preview - that is expected, because the character is blank.
| Unicode code point | U+205F |
|---|---|
| Character name | Medium Mathematical Space |
| Unicode category | Zs (Space Separator) |
| Rendered width | Exactly 4/18 em - two ninths of the font size |
| Line breaking | Breaking - a line can wrap here |
| Collapses in HTML | No |
| Survives trim() | Usually yes |
| HTML entity | |
| JavaScript escape | '\u205F' |
| CSS escape | \205F |
Need these values in another format? The HTML space characters converter turns any Unicode whitespace character into HTML entities, JavaScript escapes and CSS escapes.
U+205F MEDIUM MATHEMATICAL SPACE, or MMSP, measures 4/18 em - about 3.6px in 16px text. The unusual denominator is inherited from mathematical typesetting, where spacing is traditionally reckoned in eighteenths of an em and this particular value is the medium space set around binary operators such as + and -.
It exists so that mathematical expressions can carry correct spacing in plain Unicode text, outside of MathML or TeX. When you need an equation to look right in a context that offers no maths rendering - a form field, a chat message, a database record - MMSP supplies the spacing the notation expects.
The same character can be preserved in one place and silently removed in another. Here is what actually happens to Medium Mathematical Space in the three contexts that matter most.
Does not collapse and holds its exact 4/18 em width.
Usually survives trimming, as it is not ASCII whitespace.
Generally preserved, producing a small visible gap.
Not sure what is in a string you already have? Paste it into the invisible character detector to see every hidden character with its code point, or use remove invisible characters to strip them out.
Mathematical notation in plain text, which is precisely what it was encoded for.
If what you actually need is text that looks completely empty - a blank WhatsApp message, an empty Instagram highlight name, a blank comment or a Free Fire name space - then Hangul Filler is the character to use, because it is not classified as whitespace and survives the trimming that removes Medium Mathematical Space.
Different apps prefer different Unicode characters. Start with these combinations.
Best first choice: Hangul Filler (U+3164). Alternatives: Zero Width Space and No-Break Space.
Best first choice: Hangul Filler. Alternative for tighter formatting: Zero Width Space.
Start with Hangul Filler. If the game rejects it, try Space or No-Break Space.
Use No-Break Space for preventing line breaks, EN Space and EM Space for wider spacing, and Thin Space or Hair Space for finer adjustments. For code-ready values and conversion, see HTML Space Characters.
Width is the fastest way to choose between these characters. If Medium Mathematical Space is not right for your use case, one of these probably is.
| Character | Unicode | Width |
|---|---|---|
| Hangul Filler | U+3164 | Renders blank; width varies by platform, often zero or narrow |
| Ideographic Space | U+3000 | Exactly 1 em - full-width, matching a CJK character |
| Left-To-Right Mark | U+200E | Zero - it is a formatting mark, not a space |
| Right-To-Left Mark | U+200F | Zero - it is a formatting mark, not a space |
| Space | U+0020 | Font-dependent, typically about 1/4 em |
| No-Break Space | U+00A0 | Same width as a regular space in the current font |
| Zero Width Space | U+200B | Zero - it occupies no horizontal space at all |
| EN Space | U+2002 | Exactly 1/2 em - half the current font size |
| EM Space | U+2003 | Exactly 1 em - equal to the current font size |
| Three-Per-Em Space | U+2004 | Exactly 1/3 em |
See all 18 Unicode space and invisible characters compared →
Exactly 4/18 of an em - two ninths of the font size, or about 3.6px in 16px text.
Mathematical typesetting traditionally measures spacing in eighteenths of an em, a convention carried into Unicode from TeX. The medium space set around binary operators is 4/18, hence the name and the value.
Usually not - MathML applies operator spacing automatically. MMSP is for plain-text contexts where no maths renderer is available and the spacing has to live in the characters themselves.
Explore the most useful guides on BlankText.Net for blank messages, Instagram, gaming nicknames, and Unicode spaces.