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Number to Roman Numeral

Type any number from 1 to 3,999 and see its Roman numeral — plus a clear breakdown showing exactly how each part is built.

← Got a Roman numeral to decode? Try Roman to Number

Need a number above 3,999? Large Number converter →

How does the conversion work?

Roman numerals use a system of symbols where you subtract the largest symbol that fits, write it down, then repeat with what's left. There are 7 core symbols:

I 1
V 5
X 10
L 50
C 100
D 500
M 1000

Try an example: 1,984

1,984 → M (1,000) → CM (900) → LXXX (80: L+X+X+X) → IV (4) = MCMLXXXIV

The 6 subtractive pairs

To avoid writing 4 in a row, Romans used these shortcuts:

  • IV = 4 (not IIII)
  • IX = 9 (not VIIII)
  • XL = 40 (not XXXX)
  • XC = 90 (not LXXXX)
  • CD = 400 (not CCCC)
  • CM = 900 (not DCCCC)

How to Convert a Number to Roman Numerals

The converter uses the greedy subtraction method — the same method Romans used.

1

Find the largest symbol that fits

Start with M (1,000). If your number is 1,000 or more, write M and subtract 1,000. Keep going until no more Ms fit, then try CM (900), D (500), and so on down the table.

2

Use subtractive pairs where needed

Six special pairs avoid repeating a symbol four times: IV=4, IX=9, XL=40, XC=90, CD=400, CM=900. The converter applies these automatically.

3

Repeat until the remainder is zero

Continue down the symbol table until nothing is left. The symbols you wrote, in order, are your Roman numeral. The step-by-step breakdown above shows every single step.

Common Number to Roman Numeral Conversions

Quick reference for the most frequently searched conversions.

1 – 20

1 I
2 II
3 III
4 IV
5 V
6 VI
7 VII
8 VIII
9 IX
10 X
11 XI
12 XII
13 XIII
14 XIV
15 XV
16 XVI
17 XVII
18 XVIII
19 XIX
20 XX

Round Numbers

50 L
100 C
200 CC
400 CD
500 D
900 CM
1000 M
1500 MD
2000 MM
2500 MMD
3000 MMM
3500 MMMD
3999 MMMCMXCIX

Notable Years

1066 MLXVI
1776 MDCCLXXVI
1900 MCM
1969 MCMLXIX
1984 MCMLXXXIV
1999 MCMXCIX
2000 MM
2001 MMI
2010 MMX
2020 MMXX
2024 MMXXIV
2025 MMXXV
2026 MMXXVI

Frequently Asked Questions

What is the largest number I can convert to a Roman numeral?

The standard Roman numeral system goes up to 3,999 (MMMCMXCIX). That's as high as the seven symbols — I, V, X, L, C, D, M — can reach without breaking the repetition rules. For numbers above 3,999, ancient Romans used the vinculum (an overline bar). Try our Large Number converter →

What is 2024 in Roman numerals?

2024 = MMXXIV. Breaking it down: MM = 2,000 · XX = 20 · IV = 4. Type 2024 above to see the full step-by-step breakdown. The current year 2026 is MMXXVI.

How do subtractive pairs work?

To avoid writing the same symbol four times, Roman numerals use six subtractive pairs: IV=4, IX=9, XL=40, XC=90, CD=400, CM=900. A smaller symbol placed before a larger one means subtract. So IV means 5 − 1 = 4, and CM means 1,000 − 100 = 900.

Why does 4 on a clock face show IIII and not IV?

Most Roman numeral clocks use IIII for 4, not IV. There are several theories: it creates visual balance with VIII on the opposite side, it was a royal preference (King Louis XIV reportedly insisted on IIII), and it avoids the letters IV looking like the start of IVPITER (Jupiter). It's a deliberate stylistic exception, not an error. Learn more on our Clock Numerals page →

Can I convert a date to Roman numerals?

Yes — each part of a date (day, month, year) is converted separately and combined. For example, 25 December 2024 becomes XXV · XII · MMXXIV. Use our dedicated Date Converter → which handles the full date with separator and font options.

Is there a Roman numeral for zero?

No — the Romans had no symbol for zero. Their number system was purely additive and had no concept of a placeholder zero. The word nulla (meaning "nothing") was sometimes used in writing but was never a numeral. Read the full story of zero in Roman numerals →