9 in Roman Numerals

9 in Roman numerals is IX.

IX
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Decomposition

9

IX

IX

Symbol breakdown

Symbol breakdown for IX
TokenValueNotation
IX 9 Subtractive — 10 − 1 = 9

Therefore: 9 = 9

Place values

Place-value breakdown for 9
PlaceValueRoman
Ones 9 IX

Final: IX

Roman numeral length

IX uses 2 characters.

Symbol frequency

SymbolCount
X× 1
I× 1

Subtractive pairs

9 contains 1 standard subtractive pair:

  • IX = 9 (10 − 1 = 9)

Standard subtractive forms are IV, IX, XL, XC, CD, and CM. See subtraction rules.

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← 8 in Roman numerals (VIII) 10 in Roman numerals (X) →

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Neighboring values

Numbers near 9
NumberRoman numeral
5 V
6 VI
7 VII
8 VIII
9 IX
10 X
11 XI
12 XII
13 XIII

Related round numbers

4 · IV 10 · X 20 · XX 40 · XL 49 · XLIX 90 · XC 99 · XCIX 100 · C 400 · CD 500 · D 900 · CM 1000 · M

Related chart: Roman numerals 1–10 · Interactive chart tool

Common questions about 9

What is 9 in Roman numerals?

9 in Roman numerals is IX.

How do you write 9 in Roman numerals?

Write 9 as IX using the subtractive pairs shown on this page.

Is IX the correct Roman numeral for 9?

Yes. IX is the canonical standard Roman numeral for 9 in the 1–3999 range.

What number is IX?

IX equals 9.

Link to this reference

Teachers and writers are welcome to link to this page.

https://roman-numerals.net/numbers/9-in-roman-numerals/