Reference chart · 1 → 1000
Roman Numerals 1 to 1000
Updated: June 2026
Past one hundred, Roman numerals stay surprisingly orderly. Two new symbols join the set — D for 500 and M for 1000 — and the hundreds follow the exact same pattern you already know from the ones and tens. Learn one place value and you have effectively learned them all.
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The three place values
Any number up to 999 is the sum of three independent parts: hundreds, tens and ones. You convert each part on its own and write them side by side, hundreds first. Because every place uses the same five-and-subtraction rhythm, the symbols simply scale up: 1, 10 and 100 are the "ones" of their place; 5, 50 and 500 are the "fives"; and 4, 40 and 400 are all subtractive.
| Ones | Tens | Hundreds | |||
|---|---|---|---|---|---|
| 1 | I | 10 | X | 100 | C |
| 4 | IV | 40 | XL | 400 | CD |
| 5 | V | 50 | L | 500 | D |
| 9 | IX | 90 | XC | 900 | CM |
Read across any row and the shape is identical — only the symbols change. That is the whole secret to numbers in the hundreds.
The hundreds, in full
| # | Roman | # | Roman |
|---|---|---|---|
| 100 | C | 600 | DC |
| 200 | CC | 700 | DCC |
| 300 | CCC | 800 | DCCC |
| 400 | CD | 900 | CM |
| 500 | D | 1000 | M |
Notice that 100 to 300 simply repeat C, then 400 borrows from 500 with CD. After D, the 600–800 range stacks Cs on the right, and 900 borrows from 1000 with CM. It is the same march as I through X, scaled by one hundred.
Round multiples of fifty
| # | Roman | # | Roman |
|---|---|---|---|
| 150 | CL | 650 | DCL |
| 250 | CCL | 750 | DCCL |
| 350 | CCCL | 850 | DCCCL |
| 450 | CDL | 950 | CML |
| 550 | DL | 999 | CMXCIX |
A worked example: 849
Break 849 into 800 + 40 + 9. The hundreds give DCCC (500 + 100 + 100 + 100), the tens give XL (40), and the ones give IX (9). Join them in order and you get DCCCXLIX. The same place-by-place routine handles every number below a thousand — and the converter's breakdown view lays out each chunk so you can check your own working.
Where these numbers turn up
- Copyright years and film release dates between 100 and 1000 BC/AD in historical writing.
- Volume, chapter and appendix numbers in long reference works.
- Monarch and pope regnal numbers, which occasionally climb into the low hundreds historically.
- Building cornerstones and monument inscriptions across Europe.
Frequently asked questions
What is 1000 in Roman numerals?
1000 is M, from the Latin mille. It is the largest single Roman letter.
What is 500 in Roman numerals?
500 is D. With C the hundreds run C, CC, CCC, CD, D, DC, DCC, DCCC, CM.
What is 400 in Roman numerals?
CD — one hundred before five hundred, mirroring IV for 4 and XL for 40.
How do I go beyond 1000?
Keep adding Ms up to 3999, then switch on vinculum mode in the converter to reach the millions.