Notes

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.

, ,

More interesting Notes:
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

Cable Sizing Software

When sizing cables nearly, everyone uses some form of software. This ranges from homespun spreadsheets to complex network analyses software. Each has its...

Cable Sheath and Armour Loss

When sizing cables, the heat generated  by losses within any sheath or armour need to be evaluated. When significant, it becomes a factor to be considered...

1,000 kV UHV First for China

At the beginning of the year China put the world's first 1,000 kV UHV transmission system into operation. Transmitting power at over a million volts is...

Inductance

When current flows within a wire, a magnetic field is created. The potion of this magnetic field perpendicular to the wire is called the magnetic flux...

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...

Robotics - Home Innovations

We have a sister note to this (Robots - Interesting Video), in which I have posted some videos of interesting robots developed by commercial corporations...

Software Usage Guidelines

Using software in our  work is essential for most of us and we are becoming even more dependant on it's use.  While software is a great asset, many times...

Differential protection, the good old days

This morning I was explaining how differential protection works to a junior engineer. To give him something to read I opened up the NPAG (Network Protection...

IEC 61439 - The Switchgear Standard

The new standard IEC 61439 replaces the old 60439. Compared to the old standard, the new 61439 is a more clearly defined and takes into account the assembly...

Low Voltage Circuit Breakers

Circuit breakers are switching devices whose primary function is to isolate parts of an electrical distribution system in the even of abnormal conditions...

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. 

Footer
(click here to extend)
Copyright (c) 2026 myElectrical