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≞

measured by

Measured by

≞ is named “measured by,” but the name alone does not tell you what relation it denotes in a formula. In a 2006 Unicode mailing-list discussion—a forum about the character standard—one contributor said they had never seen it used and noted that Unicode’s chart gave no usage explanation. If it appears in an equation, follow that document’s definition; don’t assume it means ordinary equality.

Text symbol

Search it as: measured by symbol · measured by copy paste
Shows up in: Anything that takes text · its shape is whatever your font draws

What ≞ means

≞ is the measured by. Unicode classifies it as a mathematical symbol and files it in the Mathematical Operators block; this site shelves it under Maths.

Its appearance depends on the font and text styling.

How it is encoded

≞ is a single code point, U+225E. In HTML that is ≞, and in CSS \225E.

Don't confuse it with

Equal To By Definition

shares “by”

Questions people ask

Why does ≞ show as a box on some devices?

Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.

How to type ≞

Windows (Word)

Alt+XType 225E, then Alt+X to get ≞.

Windows

Win+Rrun charmap for the full table, or use the emoji picker's Ω symbols tab (Win + .).

macOS

Control+Command+SpaceOpen the character viewer and search “measured by”.

Linux

Ctrl+Shift+UType 225e, then Enter or Space.

HTML

≞

CSS

\225E

Codes and encoding1 code points

HTML decimal

≞

HTML hex

≞

CSS content

content: "\225E";

Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.

URL encoded

%E2%89%9E

On screen

Code points

JS .length

UTF-8 bytes

A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.

Families this belongs to

Maths & numbers1,835 symbols

1️⃣📏📐✖️➕➖➗🟰♾️#️⃣*️⃣0️⃣