Ohm Symbol Copy and Paste

Copy Ω for ohms or omega, or take ω, ℧ or a ready unit such as kΩ.

Ohm Symbol Copy and Paste

ΩGreek capital letter omegaU+03A9Ready to copy

110 omega characters and units. Tap any value to copy it.

110 omega characters and units. A character and its name both copy the character. A code copies the code.
CharacterNameCode pointAlt codeOption keysHTMLLaTeX
U+03A9. The capital omega, and the character Unicode prefers for the ohm. Alt+234 on a number pad and Option+Z both type it. Ω in HTML and \Omega in LaTeX.
U+03C9. The small form of the twenty-fourth and last Greek letter. In physics it stands for angular frequency, in radians per second. No Alt code types it. ω in HTML and \omega in LaTeX.
U+2126. The ohm's own code point, kept for older character sets. Unicode's note says the preferred representation is U+03A9, and the two are canonically equivalent: normalised text turns this one into the Greek letter. \textohm in LaTeX text.
U+2127. Unicode's alias is mho, which is ohm backwards: an old unit of conductance, equal to the siemens. Typographically a capital omega turned upside down. ℧ in HTML, and \mho in LaTeX with amssymb.
Made of U+006B and U+03A9. A thousand ohms: a small k, then the Greek capital omega, with no space. In the United States the unit is spelled kilohm, with one o.
Made of U+004D and U+03A9. A million ohms: a capital M, then the Greek capital omega. The capital matters, since a small m means a thousandth.
Made of U+006D and U+03A9. A thousandth of an ohm: a small m, then the Greek capital omega.
U+1D714. The slanted omega of a printed formula. Unicode defines it as U+03C9 in an italic font. It has no HTML name of its own.
U+1D6C0. Upright bold capital. Unicode defines it as U+03A9 in a bold font, so a search for ohm or omega may not find it.
U+1D734. Bold and slanted capital: U+03A9 in a bold italic font, by Unicode's definition.
Made of U+0391 and U+03A9. The first and the last letter of the Greek alphabet, as capitals: a Christian symbol, and a way to say the beginning and the end. The first character is the Greek alpha, U+0391, not a Latin A.
Made of U+03C9 and U+2080. Small omega with a subscript zero, U+2080: the natural angular frequency of a spring or a circuit. It also names the smallest infinite ordinal, which is more often a plain ω.

Next step Ω is Alt+234: the whole table of Alt codesYour own words in serif bold and italic

How it works

Ω is the ohm symbol and the capital omega in one character: U+03A9, the form Unicode prefers for the unit. The 110 rows also hold the older ohm sign U+2126, small ω, the mho ℧, units such as kΩ and 44 accented omegas.

Read the full guide

Two code points that look the same

Unicode also has an ohm sign, U+2126, left over from older character sets. Its own note says the preferred character is the Greek letter, and normalised text turns the sign into the letter. Alt+234, Option+Z and Ω all give the letter, so every unit row here, such as kΩ, MΩ and Ω⋅m, is built on it and pastes as one string with no space inside.

Tips
  • The RKM code drops the symbol: 5R6 means 5.6 Ω and 2K2 means 2200 Ω, so no decimal point can go missing.
  • If a document shows 10 W where 10 Ω was meant, a symbol font was lost. In that font the letter W draws as Ω.
  • William Preece proposed Ω for the ohm in 1867, because ohm and omega sound alike.

Questions and answers

How do I type the ohm symbol on a keyboard?

On Windows, hold Alt and type 234 on the number pad. On a Mac with the U.S. layout, press Option and Z. In Word, type 03A9, then Alt and X. All three give Ω. Small ω has no Alt code, so copy it.

Which ohms symbol should I copy and paste?

Copy Ω, U+03A9, the Greek capital omega. Unicode also holds an ohm sign, U+2126, kept only for backward compatibility and defined as equivalent to the letter. The two look the same, and the letter is the preferred one.

What is the HTML code for the omega symbol?

Ω is the capital and ω the small letter. As numbers, Ω is Ω or Ω, and ω is ω. Ω also gives U+03A9, not the ohm sign, and ℧ gives ℧. Case matters in all of them.

What does the upside-down ohm symbol mean?

℧ is the mho, which is ohm backwards: an old unit of conductance. One mho equals one siemens, the unit used today, and one siemens is one reciprocal ohm, Ω⁻¹. Unicode names the character Inverted ohm sign, U+2127.

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Browse Text styles

All 110 omega characters and units

Start here 12

  • Alpha and omega Made of U+0391 and U+03A9. The first and the last letter of the Greek alphabet, as capitals: a Christian symbol, and a way to say the beginning and the end. The first character is the Greek alpha, U+0391, not a Latin A.
  • Greek capital letter omega U+03A9. The capital omega, and the character Unicode prefers for the ohm. Alt+234 on a number pad and Option+Z both type it. Ω in HTML and \Omega in LaTeX.
  • Greek small letter omega U+03C9. The small form of the twenty-fourth and last Greek letter. In physics it stands for angular frequency, in radians per second. No Alt code types it. ω in HTML and \omega in LaTeX.
  • Inverted ohm sign U+2127. Unicode's alias is mho, which is ohm backwards: an old unit of conductance, equal to the siemens. Typographically a capital omega turned upside down. ℧ in HTML, and \mho in LaTeX with amssymb.
  • Kilohm Made of U+006B and U+03A9. A thousand ohms: a small k, then the Greek capital omega, with no space. In the United States the unit is spelled kilohm, with one o.
Show all 110 omega characters and units (105 more)

Start here, continued

  • Mathematical bold capital omega U+1D6C0. Upright bold capital. Unicode defines it as U+03A9 in a bold font, so a search for ohm or omega may not find it.
  • Mathematical bold italic capital omega U+1D734. Bold and slanted capital: U+03A9 in a bold italic font, by Unicode's definition.
  • Mathematical italic small omega U+1D714. The slanted omega of a printed formula. Unicode defines it as U+03C9 in an italic font. It has no HTML name of its own.
  • Megohm Made of U+004D and U+03A9. A million ohms: a capital M, then the Greek capital omega. The capital matters, since a small m means a thousandth.
  • Milliohm Made of U+006D and U+03A9. A thousandth of an ohm: a small m, then the Greek capital omega.
  • Ohm sign U+2126. The ohm's own code point, kept for older character sets. Unicode's note says the preferred representation is U+03A9, and the two are canonically equivalent: normalised text turns this one into the Greek letter. \textohm in LaTeX text.
  • Omega nought Made of U+03C9 and U+2080. Small omega with a subscript zero, U+2080: the natural angular frequency of a spring or a circuit. It also names the smallest infinite ordinal, which is more often a plain ω.

Ohms and units 7

  • Gigohm Made of U+0047 and U+03A9. A thousand million ohms: a capital G, then the Greek capital omega.
  • Microohm Made of U+03BC and U+03A9. A millionth of an ohm. The first character is the Greek mu, U+03BC, the form Unicode prefers for the micro prefix.
  • Ohm metre Made of U+03A9, U+22C5 and U+006D. The unit of resistivity: omega, the dot operator U+22C5, then m. The dot shows that the two units are multiplied.
  • Ohms per square Made of U+03A9, U+002F and U+25FB. The unit of sheet resistance: omega, a slash and a square, U+25FB. It is the resistance of a square piece of a thin film, whatever the size of the square. Also written Ω/sq.
  • Reciprocal ohm Made of U+03A9, U+207B and U+00B9. Omega to the power of minus one, made with the superscripts U+207B and U+00B9. One siemens is one reciprocal ohm.
  • Square K ohm U+33C0. Kilohm squeezed into the width of one East Asian character. Unicode defines it as a square form of k and U+03A9. In running text, type the two letters.
  • Square M ohm U+33C1. Megohm in one character, a square form of M and U+03A9.

Capital omega Ω 3

  • Mathematical italic capital omega U+1D6FA. Slanted capital. One of five maths styles of the capital, all added in Unicode version 3.1 (2001).
  • Mathematical sans-serif bold capital omega U+1D76E. Bold capital with no serifs. Unicode has sans-serif Greek in bold and bold italic only.
  • Mathematical sans-serif bold italic capital omega U+1D7A8. Bold, slanted capital with no serifs.

Small omega ω 4

  • Mathematical bold italic small omega U+1D74E. Bold and slanted: U+03C9 in a bold italic font.
  • Mathematical bold small omega U+1D6DA. Upright bold. Unicode defines it as U+03C9 in a bold font.
  • Mathematical sans-serif bold italic small omega U+1D7C2. Bold, slanted and without serifs.
  • Mathematical sans-serif bold small omega U+1D788. Bold small omega with no serifs.

Omega in formulas 10

  • Big omega of n Made of U+03A9, U+0028, U+006E and U+0029. In number theory, the count of the prime divisors of n with repeats included. In computing, big omega notation, one of the big O family.
  • Change in omega Made of U+0394 and U+03C9. The Greek capital delta, U+0394, then small omega: a change in angular velocity or frequency.
  • Little omega of n Made of U+03C9, U+0028, U+006E and U+0029. The number of distinct prime divisors of n, so ω(12) is 2.
  • Omega minus baryon Made of U+03A9 and U+207B. Capital omega with a superscript minus, U+207B: a particle made of three strange quarks, first observed in 1964.
  • Omega one Made of U+03C9 and U+2081. Small omega with a subscript one, U+2081: the first uncountable ordinal in set theory, which some books write as a capital Ω.
  • Omega squared Made of U+03C9 and U+00B2. Small omega with the superscript two, U+00B2. In simple harmonic motion the acceleration is minus omega squared times the displacement.
  • Omega t Made of U+03C9 and U+0074. Angular frequency times time, the angle a wave or a wheel has turned through.
  • Omega-3 Made of U+03C9, U+2212 and U+0033. A fatty acid whose first double bond is three atoms from the methyl end, the omega end, of the chain. The middle character is the minus sign, U+2212, which chemists use here in place of a hyphen.
  • Omega-6 Made of U+03C9, U+2212 and U+0036. A fatty acid whose first double bond is the sixth from the methyl end. Written with the minus sign, U+2212.
  • Speed from angular velocity Made of U+0076, U+003D, U+0072 and U+03C9. Speed equals radius times angular velocity, the link between motion along a circle and the turning rate.

Accented omega for Greek text 44

  • Greek capital letter omega with dasia U+1F69. Capital omega with rough breathing.
  • Greek capital letter omega with dasia and oxia U+1F6D. Capital omega with rough breathing and an acute accent.
  • Greek capital letter omega with dasia and oxia and prosgegrammeni U+1FAD. Capital omega with rough breathing, an acute accent and an iota written beside it.
  • Greek capital letter omega with dasia and perispomeni U+1F6F. Capital omega with rough breathing and a circumflex.
  • Greek capital letter omega with dasia and perispomeni and prosgegrammeni U+1FAF. Capital omega with rough breathing, a circumflex and an iota written beside it.
  • Greek capital letter omega with dasia and prosgegrammeni U+1FA9. Capital omega with rough breathing and an iota written beside it.
  • Greek capital letter omega with dasia and varia U+1F6B. Capital omega with rough breathing and a grave accent.
  • Greek capital letter omega with dasia and varia and prosgegrammeni U+1FAB. Capital omega with rough breathing, a grave accent and an iota written beside it.
  • Greek capital letter omega with oxia U+1FFB. Capital omega with an acute accent. Unicode treats it as the same letter as U+038F, the tonos form, and normalised text holds that one.
  • Greek capital letter omega with prosgegrammeni U+1FFC. Capital omega with an iota written beside it.
  • Greek capital letter omega with psili U+1F68. Capital omega with smooth breathing.
  • Greek capital letter omega with psili and oxia U+1F6C. Capital omega with smooth breathing and an acute accent.
  • Greek capital letter omega with psili and oxia and prosgegrammeni U+1FAC. Capital omega with smooth breathing, an acute accent and an iota written beside it.
  • Greek capital letter omega with psili and perispomeni U+1F6E. Capital omega with smooth breathing and a circumflex.
  • Greek capital letter omega with psili and perispomeni and prosgegrammeni U+1FAE. Capital omega with smooth breathing, a circumflex and an iota written beside it.
  • Greek capital letter omega with psili and prosgegrammeni U+1FA8. Capital omega with smooth breathing and an iota written beside it.
  • Greek capital letter omega with psili and varia U+1F6A. Capital omega with smooth breathing and a grave accent.
  • Greek capital letter omega with psili and varia and prosgegrammeni U+1FAA. Capital omega with smooth breathing, a grave accent and an iota written beside it.
  • Greek capital letter omega with tonos U+038F. Capital omega with the tonos, the one accent of modern Greek.
  • Greek capital letter omega with varia U+1FFA. Capital omega with a grave accent.
  • Greek small letter omega with dasia U+1F61. Small omega with rough breathing.
  • Greek small letter omega with dasia and oxia U+1F65. Small omega with rough breathing and an acute accent.
  • Greek small letter omega with dasia and oxia and ypogegrammeni U+1FA5. Small omega with rough breathing, an acute accent and an iota subscript.
  • Greek small letter omega with dasia and perispomeni U+1F67. Small omega with rough breathing and a circumflex.
  • Greek small letter omega with dasia and perispomeni and ypogegrammeni U+1FA7. Small omega with rough breathing, a circumflex and an iota subscript.
  • Greek small letter omega with dasia and varia U+1F63. Small omega with rough breathing and a grave accent.
  • Greek small letter omega with dasia and varia and ypogegrammeni U+1FA3. Small omega with rough breathing, a grave accent and an iota subscript.
  • Greek small letter omega with dasia and ypogegrammeni U+1FA1. Small omega with rough breathing and an iota subscript.
  • Greek small letter omega with oxia U+1F7D. Small omega with an acute accent. Unicode treats it as the same letter as U+03CE, the tonos form, and normalised text holds that one.
  • Greek small letter omega with oxia and ypogegrammeni U+1FF4. Small omega with an acute accent and an iota subscript.
  • Greek small letter omega with perispomeni U+1FF6. Small omega with a circumflex.
  • Greek small letter omega with perispomeni and ypogegrammeni U+1FF7. Small omega with a circumflex and an iota subscript.
  • Greek small letter omega with psili U+1F60. Small omega with smooth breathing.
  • Greek small letter omega with psili and oxia U+1F64. Small omega with smooth breathing and an acute accent.
  • Greek small letter omega with psili and oxia and ypogegrammeni U+1FA4. Small omega with smooth breathing, an acute accent and an iota subscript.
  • Greek small letter omega with psili and perispomeni U+1F66. Small omega with smooth breathing and a circumflex.
  • Greek small letter omega with psili and perispomeni and ypogegrammeni U+1FA6. Small omega with smooth breathing, a circumflex and an iota subscript.
  • Greek small letter omega with psili and varia U+1F62. Small omega with smooth breathing and a grave accent.
  • Greek small letter omega with psili and varia and ypogegrammeni U+1FA2. Small omega with smooth breathing, a grave accent and an iota subscript.
  • Greek small letter omega with psili and ypogegrammeni U+1FA0. Small omega with smooth breathing and an iota subscript.
  • Greek small letter omega with tonos U+03CE. Small omega with the tonos, the one accent of modern Greek.
  • Greek small letter omega with varia U+1F7C. Small omega with a grave accent.
  • Greek small letter omega with varia and ypogegrammeni U+1FF2. Small omega with a grave accent and an iota subscript.
  • Greek small letter omega with ypogegrammeni U+1FF3. Small omega with an iota subscript.

Omega outside Greek 13

  • APL functional symbol omega U+2375. Omega in the APL programming language, where it names the right argument of a function.
  • APL functional symbol omega underbar U+2379. The APL omega with a bar under it.
  • Coptic capital letter oou U+2CB0. Oou, the Coptic letter that matches the Greek omega, with the same number value of 800. Added in Unicode version 4.1 (2005), when Coptic was separated from the Greek block.
  • Coptic small letter oou U+2CB1. The small letter of the Coptic pair.
  • Cyrillic capital letter broad omega U+A64C. Broad omega, filed under Letters for Old Cyrillic. Added in Unicode version 5.1 (2008).
  • Cyrillic capital letter omega U+0460. The early Cyrillic alphabet took omega over from Greek. Unicode files this letter under Historic letters.
  • Cyrillic capital letter omega with titlo U+047C. Unicode's alias is Cyrillic beautiful omega. Its note says that, despite the name, the character has no titlo and is not an omega plus a mark.
  • Cyrillic capital letter round omega U+047A. In spite of its Unicode name, a variant of the Cyrillic letter o with the same sound, used only in Church Slavonic. It is also called broad on.
  • Cyrillic small letter broad omega U+A64D. The small broad omega.
  • Cyrillic small letter omega U+0461. The small letter of the Cyrillic pair.
  • Cyrillic small letter omega with titlo U+047D. The small beautiful omega.
  • Cyrillic small letter round omega U+047B. The small round omega.
  • Latin small letter closed omega U+0277. A phonetic letter for the near-close near-back rounded vowel. Unicode's note on U+028A calls that letter the preferred one in the International Phonetic Alphabet.

Look-alikes that are not omega 5

  • Ascending node U+260A. The sign for the ascending node of an orbit. Unicode cross-references it from the ohm sign, and its alias is the alchemical symbol for sublimation. The longitude of the ascending node is written with a plain Ω.
  • Descending node U+260B. The descending node, the same sign upside down. Unicode cross-references it from the mho sign, and its alias is the alchemical symbol for purify.
  • Greek pi symbol U+03D6. Unicode's alias is omega pi: a variant of pi that looks like a small omega under a bar. ϖ in HTML and \varpi in LaTeX.
  • Latin capital letter upsilon U+01B1. The capital of U+028A, used in African alphabets. Typographically a turned capital omega, and Unicode cross-references it to the mho sign.
  • Latin small letter upsilon U+028A. A phonetic vowel letter. Unicode's note calls it, typographically, a turned Greek small capital omega. It is not an upside-down ohm sign: that is U+2127.

May be an empty box 12

  • Greek letter small capital omega U+AB65. A capital shape at small letter height, which Unicode's note calls obsolete as a phonetic vowel sign. Added in Unicode version 7.0 (2014).
  • Latin capital letter closed omega U+A7DD. The capital of the closed omega, U+0277. Added in Unicode version 18.0 (2026).
  • Latin capital letter closed omega with long stem U+1DF74. Filed under Additions for the English Phonotypic Alphabet. Added in Unicode version 18.0 (2026).
  • Latin capital letter omega U+A7B6. A Latin letter, filed under Letters for African languages. Added in Unicode version 8.0 (2015). It may need a font you add yourself.
  • Latin capital letter turned closed omega U+1DF76. A closed omega turned upside down, from the same phonotypic alphabet.
  • Latin small letter barred closed omega U+1DF53. A closed omega with a bar. Added in Unicode version 18.0 (2026).
  • Latin small letter closed omega with long stem U+1DF75. The small letter of the pair with a long stem.
  • Latin small letter omega U+A7B7. The small Latin omega. Added in Unicode 8.0 (2015).
  • Latin small letter omega with loop U+1DF60. An omega with a loop. Added in Unicode version 18.0 (2026).
  • Latin small letter turned closed omega U+1DF77. The small turned closed omega.
  • Modifier letter small closed omega U+107A4. A raised closed omega: Unicode defines it as a superscript U+0277. Added in Unicode version 14.0 (2021).
  • Modifier letter small Greek omega U+1DFF4. A raised small omega: Unicode defines it as a superscript U+03C9. Added in Unicode version 18.0 (2026). Some documents from before the Second World War wrote ohms with a raised small omega.

How this list was compiled: Names, and the code points they belong to, are checked against UnicodeData.txt, version 18.0.0 (https://www.unicode.org/Public/18.0.0/ucd/UnicodeData.txt, checked 2026-09-20), and printed in sentence case. Notes that say Unicode's note, Unicode's alias, Unicode files it or cross-references quote the headings, aliases, notes and cross-references of NamesList.txt of the same version (https://www.unicode.org/Public/18.0.0/ucd/NamesList.txt); the version a character was added in is from DerivedAge.txt (https://www.unicode.org/Public/18.0.0/ucd/DerivedAge.txt), block names are from Blocks.txt, the Emoji property and the text style and emoji style sequences are from emoji-data.txt and emoji-variation-sequences.txt of the same version, and the years are from https://www.unicode.org/history/publicationdates.html. Alt codes are from the code page 437 table (https://www.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/PC/CP437.TXT), the PC graphics table for codes 1 to 31 (https://www.unicode.org/Public/MAPPINGS/VENDORS/MISC/IBMGRAPH.TXT) and the code page 1252 table (https://www.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/WINDOWS/CP1252.TXT). Option keys were read from a U.S. keyboard layout; other layouts differ. HTML entity names are from https://html.spec.whatwg.org/entities.json, the HTML 4 name first where there is one, else the shortest. LaTeX macros are listed only when LaTeX's own fontdef.dtx or ltoutenc.dtx (https://github.com/latex3/latex2e/tree/develop/base) or the amssymb and amsfonts sources (https://mirrors.ctan.org/fonts/amsfonts/source/) define them, matched to a code point through unicode-math-table.tex (https://github.com/latex3/unicode-math). The last group holds characters that one ordinary computer had no font for on the day this list was checked; your device may differ. Uses and history were checked on 2026-09-20 against https://en.wikipedia.org/wiki/Omega (last letter, angular frequency, ordinals, the prime omega functions, the right argument in APL, Cyrillic omega, alpha and omega), https://en.wikipedia.org/wiki/Ohm (U+2126 against U+03A9, the mho, kilohm and megohm), https://en.wikipedia.org/wiki/Angular_frequency, https://en.wikipedia.org/wiki/Sheet_resistance, https://en.wikipedia.org/wiki/Electrical_resistivity_and_conductivity, https://en.wikipedia.org/wiki/Omega_baryon, https://en.wikipedia.org/wiki/Omega-3_fatty_acid, https://en.wikipedia.org/wiki/Omega-6_fatty_acid and https://en.wikipedia.org/wiki/Greek_diacritics (the names of the breathings and accents), https://en.wikipedia.org/wiki/Broad_On and https://en.wikipedia.org/wiki/Coptic_script. The 44 accented rows are every character whose name begins Greek small or capital letter omega with, selected by that pattern. Every made row uses U+03A9 or U+03C9, never U+2126. Start here is this site's own pick. Licence: own work (facts from the Unicode Character Database, Unicode License v3, and from Wikipedia, CC BY-SA 4.0, restated in our own words; aliases and notes marked as Unicode's are quoted from NamesList.txt, Copyright © 1991-2026 Unicode, Inc., https://www.unicode.org/license.txt)