U+29D7 · Math symbol
LaTeX
\blackhourglass
Black Hourglass Symbol ⧗
⧗ is black hourglass, U+29D7 — \blackhourglass in LaTeX. It was added in Unicode 3.2, and Unicode files it under Math symbol.
Codes & technical data
| Unicode | U+29D7 | |
|---|---|---|
| HTML hex | ⧗ | |
| HTML decimal | ⧗ | |
| CSS | \29D7 | |
| JavaScript | \u{29D7} | |
| Python | \U000029D7 | |
| Java / C# | \u29D7 | |
| Rust | \u{29d7} | |
| Swift | \u{29D7} | |
| PHP | \u{29D7} | |
| URL encoded | %E2%A7%97 | |
| UTF-8 bytes | E2 A7 97 | |
| UTF-16 bytes | 29D7 | |
| Base64 | 4qeX | |
| Decimal | 10711 | |
| LaTeX | \blackhourglass | |
| Category | Math symbol (Sm) | |
| Introduced | Unicode 3.2 | |
Will ⧗ survive being pasted?
- Normalisation. Yes. ⧗ is unchanged by NFKC, so it survives normalising systems intact.
- Legacy encodings. ⧗ is Unicode-only — it has no Latin-1 equivalent, so a system stuck on an 8-bit encoding cannot represent it.
- Size. 3 bytes in UTF-8. Character-limited fields — SMS, bios, some form validators — usually count bytes, not characters.
Unicode cross-references
The standard points readers of ⧗ at these characters — usually because they look alike, or because one is the correct choice where the other is often used by mistake.
Nearby in Miscellaneous Mathematical Symbols-B
Brackets, fences and operators for advanced notation — the ceiling and floor variants, angle brackets and the many circled and squared operators.
All 128 characters in Miscellaneous Mathematical Symbols-B →
How to type ⧗
| Windows | Type 29D7 then press Alt+X |
|---|---|
| macOS | Press Ctrl+Cmd+Space, then search for “black hourglass” |
| Linux | Press Ctrl+Shift+U, type 29d7, press Enter |
| HTML | ⧗ |
About Unicode’s Math symbol category
Unicode classifies this as a mathematical symbol, which means software that lays out formulas treats it as an operator or relation and gives it spacing accordingly, rather than setting it tight against its neighbours like a letter.
Frequently asked questions
- How do I type the ⧗ black hourglass symbol?
- On Windows, type 29D7 and press Alt+X. On Linux press Ctrl+Shift+U then 29d7. On any system the quickest route is the copy button on this page.
- What is the code for ⧗?
- Black Hourglass is U+29D7 and in LaTeX as \blackhourglass. In UTF-8 it takes 3 bytes. The table above lists every escape format.
- What kind of character is ⧗?
- Black Hourglass is filed under Math symbol in the Miscellaneous Mathematical Symbols-B block, and was introduced in Unicode 3.2. Unicode classifies this as a mathematical symbol, which means software that lays out formulas treats it as an operator or relation and gives it spacing accordingly, rather than setting it tight against its neighbours like a letter.