Tools / Roman numerals converter
Roman numerals converter
Type a number or a Roman numeral – the converter detects which one and shows the other with the breakdown.
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🔒 Runs entirely in your browser – nothing you enter is uploaded or stored.
How to use it
- Type a number (1–3,999) or Roman numerals.
- The result appears instantly.
- Check the breakdown to see how it is built.
Your inputs live only in the link, not on our server.
Last checked: October 2026. Found a mistake? Use the form below – we fix confirmed errors and update the date.
Frequently asked questions
What is 2026 in Roman numerals?
MMXXVI = 1,000 + 1,000 + 10 + 10 + 5 + 1.
Why is 4 written IV?
A smaller numeral before a larger one is subtracted: 5 − 1 = 4.
Is there a zero?
No, Roman numerals have no zero; the converter works from 1 to 3,999.