Roomalaisten numeroiden muuntaja

Roomalaisten numeroiden muuntaja – ominaisuudet

• 01

  Both directions, auto-detected

  Type a number to get the numeral, or type a numeral to get the number — the tool detects which you entered and converts automatically.

• 02

  Large numbers with overline

  Values above 3,999 use the vinculum: an overline over a symbol multiplies it by 1,000, extending the range up to 3,999,999.

• 03

  Validation and breakdown

  Malformed or non-standard numerals are flagged, and a breakdown table shows each symbol's contribution so the result is easy to verify.

Roomalaisten numeroiden muuntaja – UKK

How do I convert a number to Roman numerals?

Type the number (for example 2025) and the Roman numeral (MMXXV) appears instantly, along with a breakdown of how each symbol adds up.

How do I convert Roman numerals to a number?

Type the numeral, such as MCMLXXXIV, and the tool decodes it to 1984. It auto-detects that you entered a numeral and validates that it's well formed.

What is the largest number it supports?

3,999,999. Numbers above 3,999 use overline (vinculum) notation, where a bar over a symbol means times 1,000, so M with an overline equals 1,000,000.

Why does it say my numeral isn't standard?

The numeral parses to a value but isn't written in the canonical form (for example IIII instead of IV). The tool still shows the number but flags it so you can use the standard spelling.

Is my input sent anywhere?

No. Conversion happens entirely in your browser and nothing you enter is uploaded.