1 in Roman Numerals

1 in Roman numerals is I.

I
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Decomposition

1

I

I

Symbol breakdown

Symbol breakdown for I
TokenValueNotation
I 1 Additive — I = 1

Therefore: 1 = 1

Place values

Place-value breakdown for 1
PlaceValueRoman
Ones 1 I

Final: I

Roman numeral length

I uses 1 character.

Symbol frequency

SymbolCount
I× 1

Subtractive pairs

I is written entirely with additive combinations—no IV, IX, XL, XC, CD, or CM pairs appear.

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Neighboring values

Numbers near 1
NumberRoman numeral
1 I
2 II
3 III
4 IV
5 V
6 VI
7 VII
8 VIII
9 IX

Related round numbers

4 · IV 9 · IX 10 · X 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 1

What is 1 in Roman numerals?

1 in Roman numerals is I.

How do you write 1 in Roman numerals?

Write 1 as I using additive combinations of the standard symbols.

Is I the correct Roman numeral for 1?

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

What number is I?

I equals 1.

Link to this reference

Teachers and writers are welcome to link to this page.

https://roman-numerals.net/numbers/1-in-roman-numerals/