Round a number to decimal places or powers of ten using four methods.
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Category: Converters
Roman Numeral Converter
Convert Roman numerals to decimal numbers and decimal numbers to Roman notation.
Runs in your browserProcessed locally. Your input never leaves your device.
Range: 1-3999. The direction is detected automatically.
Result
MMXXVI
- Arabic number
- 2026
- Roman numeral
- MMXXVI
- Decomposition
- M (1000) + M (1000) + X (10) + X (10) + V (5) + I (1)
Details
About this tool
Convert standard Roman numerals from I to MMMCMXCIX, or enter a decimal number from 1 to 3,999. The workspace validates subtractive notation and explains the symbols used in the result.
Everything runs locally, so the value is converted immediately without a request to a server.
Reference
Roman numeral chart
The most useful values in one place. Other numbers are built by combining symbols from the largest value to the smallest.
| Number | Roman numeral |
|---|---|
| 1 | I |
| 2 | II |
| 3 | III |
| 4 | IV |
| 5 | V |
| 6 | VI |
| 7 | VII |
| 8 | VIII |
| 9 | IX |
| 10 | X |
| 20 | XX |
| 30 | XXX |
| 40 | XL |
| 50 | L |
| 60 | LX |
| 70 | LXX |
| 80 | LXXX |
| 90 | XC |
| 100 | C |
| 500 | D |
| 1000 | M |
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Good to know
Questions people actually ask
- How does subtractive Roman notation work?
- A smaller symbol before a larger one is subtracted, as in IV for 4 and XC for 90. Only standard pairs are accepted.
- What is the largest supported Roman numeral?
- The standard notation used here covers 1 through 3,999. Larger values require additional conventions that are not represented consistently in plain text.
- Can I enter lowercase Roman numerals?
- Yes. Letter case does not change the value, and the result is returned in standard uppercase notation.