Step 1: Determine the UTF-8 encoding bit layout
The character ℍ has the Unicode code point U+210D. In UTF-8, it is encoded using 3 bytes because its codepoint is in the range of
0x0800to0xffff.
Therefore we know that the UTF-8 encoding will be done over 16 bits within the final 24 bits and that it will have the format:1110xxxx 10xxxxxx 10xxxxxx
Where thexare the payload bits.UTF-8 Encoding bit layout by codepoint range Codepoint Range Bytes Bit pattern Payload length U+0000 - U+007F 1 0xxxxxxx 7 bits U+0080 - U+07FF 2 110xxxxx 10xxxxxx 11 bits U+0800 - U+FFFF 3 1110xxxx 10xxxxxx 10xxxxxx 16 bits U+10000 - U+10FFFF 4 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx 21 bits Step 2: Obtain the payload bits:
Convert the hexadecimal code point U+210D to binary:
00100001 00001101. Those are the payload bits.Step 3: Fill in the bits to match the bit pattern:
Obtain the final bytes by arranging the paylod bits to match the bit layout:
11100010 10000100 10001101
DOUBLE-STRUCK CAPITAL H·U+210D
ℍ
Character Information
Code Point
U+210D
HEX
210D
Unicode Plane
Basic Multilingual Plane
Category
Uppercase Letter
Character Representations
Click elements to copy| Encoding | Hex | Binary |
|---|---|---|
| UTF8 | E2 84 8D | 11100010 10000100 10001101 |
| UTF16 (big Endian) | 21 0D | 00100001 00001101 |
| UTF16 (little Endian) | 0D 21 | 00001101 00100001 |
| UTF32 (big Endian) | 00 00 21 0D | 00000000 00000000 00100001 00001101 |
| UTF32 (little Endian) | 0D 21 00 00 | 00001101 00100001 00000000 00000000 |
HTML Entity
ℍ
URI Encoded
%E2%84%8D
Description
The Unicode character U+210D, known as the DOUBLE-STRUCK CAPITAL H (ℌ), is a typographical representation of the letter "H" in a bold, double-struck style. Typically used in mathematical and scientific text, this symbol enables clear distinction between variables, constants, and other elements within equations or formulas. The DOUBLE-STRUCK CAPITAL H is particularly useful when differentiating between standard characters and those with additional emphasis, as it maintains clarity in digital text without relying on italicization or bolding. Although U+210D is not widely used in everyday language or communication, its presence within the Unicode character set ensures that it remains accessible for specific technical contexts where its unique style is beneficial for readability and comprehension.
How to type the ℍ symbol on Windows
Hold Alt and type 8461 on the numpad. Or use Character Map.