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℧

inverted ohm sign

Inverted Ohm Sign

39/78

The inverted ohm sign ℧ denotes electrical conductance: how readily current flows, the reciprocal of resistance. It is the older mho notation; modern SI writing uses S for siemens.

Text symbol

What ℧ means

℧ means conductance: how readily electric current flows.

A mho is an older unit name for conductance, spelled from “ohm” backward; one mho equals one siemens. The earliest recorded use of mho is from 1884.

In 1971, the SI adopted siemens, symbol S, as the unit name and symbol for conductance. ℧ is therefore older or specialist notation.

Specialist electrical notation: mho is older terminology, while SI uses the siemens.

Use ℧ for conductance, not ordinary resistance.

Part of the collection

Don't confuse it with

1

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.

Collections with ℧

2

How to type or find ℧

Also called
mho
Search it as
inverted omega · reciprocal ohm · conductance symbol · turned omega · siemens symbol
Shows up in
Anything that takes text · its shape is whatever your font draws
Windows (Word)
⎇Alt+XType 2127, then AltX 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 “inverted ohm sign”.
Linux
⎈Ctrl+⇧Shift+UType 2127, then Enter or Space.
HTML
℧
CSS
\2127
HTML
Write ℧ in HTML source; the numeric character reference renders as ℧.
Codes and encoding1 code points
HTML decimal
℧
HTML hex
℧
CSS content
content: "\2127";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E2%84%A7
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

2

Typography & punctuation332 symbols

Letters1,265 symbols