Roman Numeral Converter
Convert Arabic numbers to Roman numerals and vice versa. Step-by-step explanation, free and no registration required.
Result
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Referenztabelle
Note: These calculations are for informational purposes only and do not replace professional tax or financial advice. All information without guarantee.
Frequently Asked Questions
How do Roman numerals work?
Roman numerals use letters: I=1, V=5, X=10, L=50, C=100, D=500, M=1000. Smaller values before larger ones are subtracted (IV=4, IX=9). Numbers are read left to right.
What is the largest number in Roman numerals?
Standard Roman numerals go up to 3,999 (MMMCMXCIX). Larger numbers use a vinculum (bar above) to multiply by 1,000, but this is rarely needed in modern usage.
What is the Roman Numeral Converter?
The Roman numerals calculator converts Arabic numbers into Roman numeral notation and vice versa.
How does the Roman Numeral Converter work?
Enter an Arabic number (1-3,999) or Roman numerals. The calculator converts to the other form. The subtractive rule (e.g. IV = 4) is correctly applied.
Key Data and Facts
Basic symbols: I=1, V=5, X=10, L=50, C=100, D=500, M=1,000. Subtractive rule: IV=4, IX=9, XL=40, XC=90, CD=400, CM=900. Max. standard notation: 3,999 (MMMCMXCIX).
Step-by-Step Guide
How to use den Roemische-Zahlen-Rechner step by step: 1. Eingaberichtung choose -- arabisch zu roemisch oder roemisch zu arabisch. 2. Zahl enter -- bei arabischen Zahlen den Wert zwischen 1 und 3.999 eintragen. Bei roemischen Ziffern die Zeichen I, V, X, L, C, D, M enter. 3. Ergebnis ablesen -- der Rechner zeigt die konvertierte Zahl sofort an. 4. Subtraktionsregel verstehen: Ein kleineres Zeichen vor einem groesseren wird subtrahiert. IV = 5 - 1 = 4, IX = 10 - 1 = 9, XL = 50 - 10 = 40, XC = 100 - 10 = 90. 5. Additionsregel: Gleiche oder absteigende Zeichen werden addiert. VIII = 5 + 1 + 1 + 1 = 8. Maximal drei gleiche Zeichen hintereinander (III = 3, aber 4 = IV, nicht IIII). Typische Anwendungen: Jahreszahlen auf Gebaeuden (MMXXVI = 2026), Kapitel- und Absatznummerierungen, Uhrzifferblatter. Tipp: Grosse Zahlen von links nach rechts in Tausender, Hunderter, Zehner und Einer zerlegen.
Calculation Example
Arabisch 1994 zu roemisch: 1000=M, 900=CM, 90=XC, 4=IV -- Ergebnis: MCMXCIV. Roemisch CDLXVII zu arabisch: 400+50+10+5+1+1 = 467.
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