How do I type the 〇 ideographic number zero symbol?

On Windows, type 3007 and press Alt+X. On Linux press Ctrl+Shift+U then 3007. On any system the quickest route is the copy button on this page.

What is the code for 〇?

Ideographic Number Zero is U+3007. In UTF-8 it takes 3 bytes. The table above lists every escape format.

What kind of character is 〇?

Ideographic Number Zero is filed under Letter number in the CJK Symbols and Punctuation block, and was introduced in Unicode 1.1. This is a letter number: a character that looks like a letter but carries a numeric value, the way Roman numerals do.

U+3007 · Letter number

Ideographic Number Zero Symbol 〇

〇 is ideographic number zero, and Unicode gives it the numeric value 0. It was added in Unicode 1.1, and Unicode files it under Letter number.

Codes & technical data

Unicode	`U+3007`
HTML hex	`〇`
HTML decimal	`〇`
CSS	`\3007`
JavaScript	`\u{3007}`
Python	`\U00003007`
Java / C#	`\u3007`
Rust	`\u{3007}`
Swift	`\u{3007}`
PHP	`\u{3007}`
URL encoded	`%E3%80%87`
UTF-8 bytes	`E3 80 87`
UTF-16 bytes	`3007`
Base64	`44CH`
Decimal	`12295`
Numeric value	0
Category	Letter number (Nl)
Introduced	Unicode 1.1

Will 〇 survive being pasted?

Normalisation. Yes. 〇 is unchanged by NFKC, so it survives normalising systems intact.
Legacy encodings. 〇 is Unicode-only — it has no Latin-1 equivalent, so a system stuck on an 8-bit encoding cannot represent it.
Size. 3 bytes in UTF-8. Character-limited fields — SMS, bios, some form validators — usually count bytes, not characters.

Unicode cross-references

The standard points readers of 〇 at these characters — usually because they look alike, or because one is the correct choice where the other is often used by mistake.

Other zero characters

Unicode names 5 characters ending in “zero”. They differ by direction, weight or decoration rather than by meaning.

Nearby in CJK Symbols and Punctuation

The punctuation Chinese, Japanese and Korean typography needs — the ideographic full stop and comma, corner brackets, the iteration mark, and the wave dash.

All 48 characters in CJK Symbols and Punctuation →

How to type 〇

Windows	Type `3007` then press `Alt`+`X`
macOS	Press `Ctrl`+`Cmd`+`Space`, then search for “ideographic number zero”
Linux	Press `Ctrl`+`Shift`+`U`, type `3007`, press `Enter`
HTML	`〇`

About Unicode’s Letter number category

This is a letter number: a character that looks like a letter but carries a numeric value, the way Roman numerals do.

Frequently asked questions

How do I type the 〇 ideographic number zero symbol?: On Windows, type 3007 and press Alt+X. On Linux press Ctrl+Shift+U then 3007. On any system the quickest route is the copy button on this page.
What is the code for 〇?: Ideographic Number Zero is U+3007. In UTF-8 it takes 3 bytes. The table above lists every escape format.
What kind of character is 〇?: Ideographic Number Zero is filed under Letter number in the CJK Symbols and Punctuation block, and was introduced in Unicode 1.1. This is a letter number: a character that looks like a letter but carries a numeric value, the way Roman numerals do.