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≉

not almost equal to

Not almost equal to

≉ says two values do not meet the stated “almost equal” comparison. In <code>a ≉ b</code>, they are not close enough under that comparison; <code>≠</code> only says they are not exactly equal. The tolerance comes from the surrounding math.

Text symbol
Also called
not approximate · not approximately equal · napprox
Search it as
negated approximation · not equal approximation
Shows up in
Anything that takes text · its shape is whatever your font draws

What ≉ means

It rejects the stated almost-equal relationship.

In a ≉ b, the values fail the approximation criterion in use; the symbol itself does not give a numerical tolerance. The slash in ≉ negates the almost-equal relation represented by ≈.

Formal mathematical notation; use it when the relevant notion of “almost equal” is already defined.

For values that are merely unequal, use ≠; ≉ also says the chosen approximation fails.

Don't confuse it with

2
≠
Not Equal To
≉ vs ≠: ≠ rules out exact equality; ≉ rejects the stated almost-equal relation.
≇
Neither Approximately Nor Actually Equal To
≇ negates the “approximately equal” relation; ≉ negates “almost equal.” Follow the notation defined for your subject.

Questions people ask

1

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 2249, 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 “not almost equal to”.
Linux
Ctrl+Shift+UType 2249, then Enter or Space.
HTML
&#x2249;
CSS
\2249
How to type ≉
In LaTeX math mode, write `\not\approx` to produce ≉.
MathML entity names
In MathML markup, the named entities `&nap;` and `&napprox;` represent ≉.
Codes and encoding1 code points
HTML decimal
&#8777;
HTML hex
&#x2249;
CSS content
content: "\2249";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E2%89%89
1
On screen
1
Code points
1
JS .length
3
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

1

Maths & numbers1,835 symbols

1️⃣📏📐✖️➕➖➗🟰♾️#️⃣*️⃣0️⃣