Roman Numeral Converter XI

About this app

Convert Roman numerals to numbers and back, instantly. Tap out CXXIII and see 123. Type 2026 and get MMXXVI. One thing, done fast. DATES, DONE PROPERLY The Date tab turns any date into Roman numerals — the reason most people need them in the first place: • Choose DD MM YYYY, MM DD YYYY, or the year on its own • Pick your separator: · . / — or a plain space • Copy or share the result in one tap • Ideal for tattoos, wedding bands, engravings and anniversaries BUILT FOR THE JOB • Two-way conversion — numerals to numbers, or numbers to numerals • Live results as you type, with malformed numerals corrected as you go • Strict checking: IIII, VV and IC are caught rather than quietly guessed at • Covers the full standard range, I to MMMCMXCIX (1 to 3999) • Conversions work with no internet connection • Full support for light and dark mode Free to use. Remove the ads with a single one-off purchase — never a subscription.

XI has been rebuilt from the ground up. NEW — Date tab Turn any date into Roman numerals, choose your format and separator, then copy or share it. Made for tattoos, engravings and anniversaries. NEW — A completely new design Cleaner layout, numerals set in a proper serif, and full support for dark mode. FIXED — Remove Ads was unreachable A long-standing bug hid the Support screen entirely. Remove Ads and Restore Purchases are now where you would expect them. ALSO • Restore Purchases works across devices and reinstalls • Correct layout on every current iPhone and iPad • Stricter validation — malformed numerals are caught rather than guessed at Thank you to everyone who has rated XI over the years.

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1. First observed Aug 23, 2026 · 6:55 AM Free