How Roman numerals work. Seven letters stand for numbers: I = 1, V = 5, X = 10, L = 50, C = 100, D = 500 and M = 1,000. Write the largest values first and add them up: XVI = 10 + 5 + 1 = 16. When a smaller symbol comes just before a larger one, subtract it: IV = 4, IX = 9, XL = 40, XC = 90, CD = 400 and CM = 900.
How to use the converter
- Pick Number to Roman, Roman to number, or Date to Roman.
- Type the number or the numeral. Lowercase letters are fine.
- Read the result and the working under it. Use Copy result to paste it elsewhere.
- For a date, choose the order and the separator you want, for example VII.XI.MMXXVI for 7 November 2026.
Worked examples
2026 to Roman. 2000 = MM, 20 = XX, 6 = VI. Together: MMXXVI.
MCMXCIV to a number. M = 1000, CM = 900, XC = 90, IV = 4. Total: 1994.
A date. 15 August 1947 in day, month, year order is XV.VIII.MCMXLVII.
Roman numerals chart
| Number | Roman | Number | Roman |
|---|---|---|---|
| 1 | I | 20 | XX |
| 2 | II | 30 | XXX |
| 3 | III | 40 | XL |
| 4 | IV | 50 | L |
| 5 | V | 90 | XC |
| 6 | VI | 100 | C |
| 7 | VII | 400 | CD |
| 8 | VIII | 500 | D |
| 9 | IX | 900 | CM |
| 10 | X | 1000 | M |
Frequently asked questions
Why does the converter stop at 3,999?
The standard system allows a symbol to repeat at most three times, so MMM (3,000) is the largest thousands value. Bigger numbers were written with a bar over a letter to multiply it by 1,000, a style that is rarely used today.
Is there a Roman numeral for zero?
No. The Romans had no symbol for zero, and the converter starts at 1.
Is IIII correct for 4?
The standard form is IV. You will still see IIII on many clock faces. The converter reads IIII as 4 and tells you the standard form.
How do I write 2026 in Roman numerals?
MMXXVI. Two thousands (MM), two tens (XX) and six (VI).
Can I check a date for a tattoo or an invitation?
Yes. Use the Date to Roman tab, pick the order your country uses, and copy the result. Check the date twice before it is printed or inked.
About this tool. It runs in your browser and nothing you type is sent anywhere. Last reviewed: November 2026. Found a problem? Tell us on the Contact page. Related tools: Age Calculator, Percentage Calculator and Unit Converter.