Roman Numeral Converter
Convert Arabic numbers to Roman numerals and back instantly. Includes symbol breakdown, date converter, and complete reference chart 1–100.
Roman Numeral Converter
Bidirectional · Instant · Breakdown
2,026 in Roman Numeral
MMXXVI
Symbol Breakdown
M ×2
1,000
2,000
X ×2
10
2,020
V
5
2,025
I
1
2,026
Quick Numbers
THE 7 SYMBOLS
Roman Numeral Symbols & Values
All Roman numerals are built from these seven letters of the Latin alphabet.
I
1
unus
V
5
quinque
X
10
decem
L
50
quinquaginta
C
100
centum
D
500
quingenti
M
1,000
mille
REFERENCE CHART
Roman Numerals 1–50
The complete reference for numbers 1 through 50.
Notable Roman Numerals in Culture
Roman numerals you'll encounter in the real world.
| Roman | Value | Where You've Seen It |
|---|---|---|
| MMXXVI | 2,026 | Current year |
| MMXXIV | 2,024 | Paris Olympics / Super Bowl LVIII year |
| LIX | 59 | Super Bowl LIX (2025, New Orleans) |
| LVIII | 58 | Super Bowl LVIII (2024, Las Vegas) |
| L | 50 | Super Bowl 50 (2016 — NFL used Arabic as exception) |
| MCMXCIX | 1,999 | Prince's “Party Like It's 1999” / Y2K year |
| MCMLXXX | 1,980 | The Empire Strikes Back copyright |
| MDCCCXII | 1,812 | Tchaikovsky's 1812 Overture |
| MDCCLXXVI | 1,776 | American Independence; Statue of Liberty |
| MCXII | 1,492 | Columbus reached the Americas (as often stylized) |
| XIV | 14 | Louis XIV, “The Sun King” of France |
| XI | 11 | Ocean's Eleven; Final Fantasy XI |
| XLII | 42 | “The answer to life, the universe, and everything” (Douglas Adams) |
| MMMCMXCIX | 3,999 | Maximum standard Roman numeral |
Why Did the Romans Use This System?
Roman numerals emerged from tally marks — a V represented a hand of five fingers and an X two crossed hands of ten. The system was designed for counting and calculation using a physical abacus, not for written arithmetic, which is exactly why long division in Roman numerals is so painful. Europe kept using the system for over a thousand years until Hindu-Arabic numerals — with their positional zero — proved far more practical for trade and science.
➕ Additive & Subtractive Rules
Additive: when a smaller or equal symbol follows a larger one, add its value (VIII = 5+1+1+1 = 8).
Subtractive: when a smaller symbol precedes a larger one, subtract it (IV = 5−1 = 4; IX = 10−1 = 9). Only I, X, and C can be used this way, and only against the two values directly above them.
🏛️ Roman Numerals Today
Despite being 2,000+ years old, Roman numerals still appear everywhere: clock faces (I–XII), movie copyright dates, Super Bowl numbering (Super Bowl LIX), Olympic Games (Paris 2024 was Games of the XXXIII Olympiad), book chapter numbering, monarchs (Charles III, Louis XIV), and cornerstones on government and university buildings.
How to Convert Numbers to Roman Numerals
Converting an Arabic number to Roman numerals uses a simple algorithm: repeatedly subtract the largest available Roman value and append its symbol. This uses a fixed table of values including the six subtractive pairs.
M=1000 D=500 C=100 CD=400 CM=900 L=50 XL=40 XC=90 V=5 IV=4 IX=9 X=10 I=1 — Algorithm: while number > 0, find the largest value that fits, append its symbol, subtract it from the number. Example: 2024 → 2024 − 1000 = 1024 (M) → 1024 − 1000 = 24 (M) → 24 − 10 = 14 (X) → 14 − 10 = 4 (X) → 4 − 4 = 0 (IV) Result: MMXXIVThe 6 Subtractive Pairs
IV = 4 (5−1) | IX = 9 (10−1) | XL = 40 (50−10) | XC = 90 (100−10) | CD = 400 (500−100) | CM = 900 (1000−100) — These 6 pairs prevent illegal repetition: IIII is wrong → IV is correct. XXXX is wrong → XL is correct. VIIII is wrong → IX is correct.How to Read Roman Numerals (Right to Left Trick)
Read left to right. If a symbol is smaller than the symbol to its right, subtract it. Otherwise add it. For MCMXCIV: M(1000)+CM(900)+XC(90)+IV(4), reading each two-letter subtractive pair as one unit — this gives 1994.
Roman Numeral Rules — Complete Guide
Rule 1: Maximum Three Repetitions — A symbol can repeat at most three times in a row (III = 3, but not IIII; XXX = 30 (valid), XXXX = 40 (invalid, use XL). The symbols V, L, and D never repeat — they appear only once.
Rule 2: Subtractive Notation Restrictions — Only I, X, and C can be used as subtractive symbols (not V, L, or D). A subtractive symbol can only precede the next two symbols in size: I before V and X only; X before L and C only; C before D and M only. V, L, and D are never subtractive.
Rule 3: Single Subtraction — Only one small-value numeral may precede a larger one at a time. IX4 is invalid (correct: VIIII is invalid, IX is correct); LXXX40 is wrong; each subtractive pair precedes exactly one larger symbol preceding one larger symbol.
Numbers Beyond 3,999 — A vinculum (bar over a numeral) multiplies its value by 1,000, so V̄ = 5,000, X̄ = 10,000, M̄ = 1,000,000. Using vinculums, numbers up to 3,999,999 can be represented. This notation is rarely used today and primarily appears in historical texts and specialized contexts.
— FAQ