1 in Roman Numerals
1 in Roman numerals is I. It is built from one part: 1 = I. Read it from left to right and add the values to get 1. Copy it below, see why it is written this way, and check the numbers before and after. The converter handles any number from 1 to 3,999.
1 in Roman numerals is I.
1 in Roman numerals: the breakdown
| Place value | Numeral | Value |
|---|---|---|
| 1 | I | 1 |
| Total | I | 1 |
1 is a single place value, so I on its own is 1.
How to read I
- I is 1.
- There is nothing else to add, so I is 1.
The numbers around 1
Facts about 1
- 1 is an odd number.
- 1 is neither prime nor composite.
- 1 is a perfect square: 1 x 1 = 1.
- 1 is a perfect cube: 1 x 1 x 1 = 1.
- The digits of 1 add up to 1.
- I is 1 letter long. It uses only the symbol I.
Convert another number
What number is I?
I is the number 1. It is a single place-value part, so reading it from left to right gives 1 straight away.
Questions and answers
What is 1 in Roman numerals?
1 in Roman numerals is I. It is made of one part: 1 = I. Read I from left to right, add the parts, and you get 1. Use the converter on this page to check any other number from 1 to 3,999.
How do you write 1 in Roman numerals?
Split 1 into its place values, write each one in Roman numerals, and join them from largest to smallest. For 1 there is only one place value, so the answer is I. Check that no letter repeats more than three times in a row.
What number is I?
I is 1. Read it from left to right: it is a single place-value part, I, which is 1, so there is nothing else to add. Letters after a larger or equal letter are added, and a smaller letter before a larger one is subtracted. You can also type I into the converter to read the number back.