Math

Roman numeral converter

Convert numbers to Roman numerals and back (1 to 3999).

Embed this calculator on your website

Copy this code and paste it into your page (WordPress, Wix, Webflow, HTML…). It's free: please keep the link to HOD Calc.

How it works

I = 1, V = 5, X = 10, L = 50, C = 100, D = 500, M = 1000. A smaller symbol before a larger one is subtracted (IV = 4).

Results are for guidance only and do not replace professional advice.

Worked example

With the default values:

  • Number or Roman numerals2026

you get:

  • In Roman numeralsMMXXVI

Frequently asked questions

How does the “Roman numeral converter” tool work?

I = 1, V = 5, X = 10, L = 50, C = 100, D = 500, M = 1000. A smaller symbol before a larger one is subtracted (IV = 4).

What do I need to enter?

Just fill in: number or roman numerals. The result updates as you type.

Can you give an example?

Number or Roman numerals: 2026 → In Roman numerals: MMXXVI.

Is this calculator free, and is my data private?

Yes. HOD Calc is completely free with no sign-up. The calculation runs in your browser: nothing you type is sent or stored.