HTML Symbol Entities 

By on

HTML supports a variety of entity symbols which can be entered using either numbers or an entity name. The number or name is preceded by the ‘&’ sign and ends in a semi-colon (;). To enter a symbol switch to HTML view in the editor and enter the number or name (Ω for example).

Cut and past is also supported.  Select the symbol from this page, ‘ctrl C’ to copy.  Position the cursor in the editor and ‘ctrl V’ to paste.


Math Symbols

Character Entity Number Entity Name Description
∀ ∀ for all
∂ ∂ part
∃ ∃ exists
∅ ∅ empty
∇ ∇ nabla
∈ ∈ isin
∉ ∉ notin
∋ ∋ ni
∏ ∏ prod
∑ ∑ sum
− − minus
∗ ∗ lowast
√ √ square root
∝ ∝ proportional to
∞ ∞ infinity
∠ ∠ angle
∧ ∧ and
∨ ∨ or
∩ ∩ cap
∪ ∪ cup
∫ ∫ integral
∴ ∴ therefore
∼ ∼ similar to
≅ ≅ congruent to
≈ ≈ almost equal
≠ ≠ not equal
≡ ≡ equivalent
≤ ≤ less or equal
≥ ≥ greater or equal
⊂ ⊂ subset of
⊃ ⊃ superset of
⊄ ⊄ not subset of
⊆ ⊆ subset or equal
⊇ ⊇ superset or equal
⊕ ⊕ circled plus
⊗ ⊗ circled times
⊥ ⊥ perpendicular
⋅ ⋅ dot operator


Greek Letters

Character Entity Number Entity Name Description
Α Α Α Alpha
Β Β Β Beta
Γ Γ Γ Gamma
Δ Δ Δ Delta
Ε Ε Ε Epsilon
Ζ Ζ Ζ Zeta
Η Η Η Eta
Θ Θ Θ Theta
Ι Ι Ι Iota
Κ Κ Κ Kappa
Λ Λ Λ Lambda
Μ Μ Μ Mu
Ν Ν Ν Nu
Ξ Ξ Ξ Xi
Ο Ο Ο Omicron
Π Π Π Pi
Ρ Ρ Ρ Rho
Σ Σ Σ Sigma
Τ Τ Τ Tau
Υ Υ Υ Upsilon
Φ Φ Φ Phi
Χ Χ Χ Chi
Ψ Ψ Ψ Psi
Ω Ω Ω Omega
α α α alpha
β β β beta
γ γ γ gamma
δ δ δ delta
ε ε ε epsilon
ζ ζ ζ zeta
η η η eta
θ θ θ theta
ι ι ι iota
κ κ κ kappa
λ λ λ lambda
μ μ μ mu
ν ν ν nu
ξ ξ ξ xi
ο ο ο omicron
π π π pi
ρ ρ ρ rho
ς ς ς sigmaf
σ σ σ sigma
τ τ τ tau
υ υ υ upsilon
φ φ φ phi
χ χ χ chi
ψ ψ ψ psi
ω ω ω omega
ϑ ϑ ϑ theta symbol
ϒ ϒ ϒ upsilon symbol
ϖ ϖ ϖ pi symbol


Other Entities

Character Entity Number Entity Name Description
ΠΠΠcapital ligature OE
œ œ œ small ligature oe
Š Š Š capital S with caron
š š š small S with caron
Ÿ Ÿ Ÿ capital Y with diaeres
ƒ ƒ ƒ f with hook
ˆ ˆ ˆ modifier letter circumflex accent
˜ ˜ ˜ small tilde
    en space
    em space
    thin space
‌ ‌ zero width non-joiner
‍ ‍ zero width joiner
‎ ‎ left-to-right mark
‏ ‏ right-to-left mark
– – en dash
— — em dash
‘ ‘ left single quotation mark
’ ’ right single quotation mark
‚ ‚ single low-9 quotation mark
“ “ left double quotation mark
” ” right double quotation mark
„ „ double low-9 quotation mark
† † dagger
‡ ‡ double dagger
• • bullet
… … horizontal ellipsis
‰ ‰ per mille
′ ′ minutes
″ ″ seconds
‹ ‹ single left angle quotation
› › single right angle quotation
‾ ‾ overline
€ € euro
™ ™ trademark
← ← left arrow
↑ ↑ up arrow
→ → right arrow
↓ ↓ down arrow
↔ ↔ left right arrow
↵ ↵ carriage return arrow
⌈ ⌈ left ceiling
⌉ ⌉ right ceiling
⌊ ⌊ left floor
⌋ ⌋ right floor
◊ ◊ lozenge
♠ ♠ spade
♣ ♣ club
♥ ♥ heart
♦ ♦ diamond

 


ASCI Codes

In addition to HTML symbol entities, it is sometimes useful to be able to quickly enter symbols using ASCI codes. 

The enter a symbol using ASCI codes, press 'Alt' and type the code on the number keypad.

The following table lists some of the more useful codes for your posts:

Arrows Greek Other

↨ - 23, up and down arrow

↑ - 24, up arrow

↓ - 25, down arrow

→ - 26, right arrow

← - 27, left arrow

↔ - 29, left and right arrow

α - 224, Alpha

Γ - 226, Gamma

π - 227, Pi

Σ - 228, summation

σ - 229, Sigma

µ - 230, Mu

τ - 231, Tau

Φ - 232, Phi

Θ -233, Theta

Ω - 234, Omega

δ - 235, delta

∞ - 236, infinity

φ - 237, Phi

ε - 238, Epsilon

≡  - 240, equivalent symbol

± - 241, plus or minus

≥ - 242, greater or equal

≤ -243 less or equal

÷ - 246, division

≈ - 247 approximate

° - 248, degree symbol

√ - 251, square root

Example:
To enter Ω, press the ‘Alt’ key and enter 234 on the numeric keypad.



Steven McFadyen's avatar Steven McFadyen

Steven has over twenty five years experience working on some of the largest construction projects. He has a deep technical understanding of electrical engineering and is keen to share this knowledge. About the author

myElectrical Engineering

comments powered by Disqus



110 or 230 Volts

I've been considering a blog on the 110 or 230 Volt issue for a while.  While browsing the Internet I came across a great summary by Borat over at  engineering...

Famous Scientists

Here’s list of some famous scientists. Deliberately short, with the aim to provide a quick memory jog or overview. If your looking for more detailed information...

How to Check a Circuit is Dead

If you want to check a circuit is dead (not live), you should always use the three point method. First check a known live circuit, then check the dead...

Three Phase Power Simplified

A single phase system is perhaps the most common type of system most people are familiar with. This is what people have in their homes and what appliances...

IEEE Winds of Change

IEEE TV has a part series of videos on wind power and it's implication. For a really good overview to the technologies and issues around wind power, these...

Dielectric loss in cables

Dielectrics (insulating materials for example) when subjected to a varying electric field, will have some energy loss.   The varying electric field causes...

Electric Motors

Collection of links to various places with useful motor information. I’ll try and return to the page every now and again to update it with any motor notes...

Thomas Edison

American inventor Thomas Alva Edison was born in Milan, Ohio on February 11, 1847. He was the youngest of seven children and received little formal schooling...

How a Digital Substation Works

Traditionally substations have used circuit breakers, current transformers (CT), voltage transformers (VT) and protection relays all wired together using...

Arc Flash Calculations

Working in the vicinity of electrical equipment poses an hazard. In addition to electric shock hazard, fault currents passing through air causes Arc Flash...

Have some knowledge to share

If you have some expert knowledge or experience, why not consider sharing this with our community.  

By writing an electrical note, you will be educating our users and at the same time promoting your expertise within the engineering community.

To get started and understand our policy, you can read our How to Write an Electrical Note