Everyday Life

Convert Between Roman Numerals & Numbers

Built by Kevin Glover · @gloverbuilds · Verified formula

Convert any number to Roman numerals and back. Supports values from 1 to 3,999.

📅 Updated April 2026 ✅ Formula verified 📖 4 min read 🆓 Free · No sign-up

In this article

Roman Numeral System
Where You See Roman Numerals

Les Symboles

I=1, V=5, X=10, L=50, C=100, D=500, M=1000. Règle de soustraction : un petit symbole devant un grand = soustraction. IV=4, IX=9, XL=40, XC=90, CD=400, CM=900. 2024 = MMXXIV. 1999 = MCMXCIX.

Utilisations Modernes

Horloges (IV ou IIII pour 4). Chapitres de livres et films (Episode IX). Super Bowl (LVIII). Numérotation de rois et papes (Louis XIV). Dates sur les monuments. La convention limite le système à 3 999 (MMMCMXCIX) — au-delà, des barres au-dessus des lettres multiplient par 1 000.

⚡ CalcWolf Insight

The most commonly searched Roman numeral query: "What is the Super Bowl number?" Super Bowl numbering uses Roman numerals to add prestige — Super Bowl LVIII (58) sounds more impressive than "Super Bowl 58." The exception: Super Bowl 50 used Arabic numerals because "Super Bowl L" looked like a losing record.

Frequently asked questions

Comment convertir ?▾

Décomposez en éléments : 1994 = 1000+900+90+4 = M+CM+XC+IV = MCMXCIV.

Pourquoi IV et pas IIII ?▾

La soustraction (IV) est le standard. Mais beaucoup d'horloges utilisent IIII pour la symétrie visuelle avec VIII.

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Kevin Glover · @gloverbuilds

Founder, CalcWolf · GLVTS · Blickr

All formulas sourced from primary references — IRS publications, peer-reviewed research, and official standards. Results are tested against independent reference calculators before publishing. Rates and brackets updated when official sources change. Editorial policy →