Roman numeral converter

Date to Roman numerals

By Cobra · Last updated

How to use the Roman numeral converter

  1. Type a number in the Number box, like 1994. The Roman numeral MCMXCIV appears next to it, with the pieces it is built from.
  2. Or type a Roman numeral in the Roman numeral box, like XLII, to get 42. Lowercase works too. If the numeral is not written the standard way, like IIII, the tool says so and shows the usual form.
  3. Turn a date into Roman numerals. Pick the date, the order and the separator. October 28, 2026 in US order with dots is X.XXVIII.MMXXVI.

How Roman numerals work

NumberRoman numeral
1I
5V
10X
50L
100C
500D
1,000M

Write the letters from largest to smallest and add them up: MDCLXVI is 1000 + 500 + 100 + 50 + 10 + 5 + 1 = 1666. When a smaller letter comes before a bigger one, subtract it instead. Only six pairs are used this way: IV (4), IX (9), XL (40), XC (90), CD (400) and CM (900). A letter is never repeated more than three times in a row, so 4 is IV, not IIII, and 40 is XL, not XXXX.

Worked examples

Roman numerals chart 1 to 100

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
21 XXI
22 XXII
23 XXIII
24 XXIV
25 XXV
26 XXVI
27 XXVII
28 XXVIII
29 XXIX
30 XXX
31 XXXI
32 XXXII
33 XXXIII
34 XXXIV
35 XXXV
36 XXXVI
37 XXXVII
38 XXXVIII
39 XXXIX
40 XL
41 XLI
42 XLII
43 XLIII
44 XLIV
45 XLV
46 XLVI
47 XLVII
48 XLVIII
49 XLIX
50 L
51 LI
52 LII
53 LIII
54 LIV
55 LV
56 LVI
57 LVII
58 LVIII
59 LIX
60 LX
61 LXI
62 LXII
63 LXIII
64 LXIV
65 LXV
66 LXVI
67 LXVII
68 LXVIII
69 LXIX
70 LXX
71 LXXI
72 LXXII
73 LXXIII
74 LXXIV
75 LXXV
76 LXXVI
77 LXXVII
78 LXXVIII
79 LXXIX
80 LXXX
81 LXXXI
82 LXXXII
83 LXXXIII
84 LXXXIV
85 LXXXV
86 LXXXVI
87 LXXXVII
88 LXXXVIII
89 LXXXIX
90 XC
91 XCI
92 XCII
93 XCIII
94 XCIV
95 XCV
96 XCVI
97 XCVII
98 XCVIII
99 XCIX
100 C

Hundreds and thousands

NumberRoman numeral
200CC
300CCC
400CD
600DC
700DCC
800DCCC
900CM
2,000MM
3,000MMM
3,999MMMCMXCIX

Years in Roman numerals

YearRoman numeral
1776MDCCLXXVI
1900MCM
1950MCML
1990MCMXC
1999MCMXCIX
2000MM
2010MMX
2020MMXX
2024MMXXIV
2025MMXXV
2026MMXXVI
2027MMXXVII
2030MMXXX

Numbers above 3,999

Standard Roman numerals stop at 3,999. For bigger numbers, a line drawn over a letter (a vinculum) multiplies it by 1,000, so V with a line over it is 5,000 and M with a line over it is 1,000,000. Tick the box above the result to use this style. The line is added with a combining overline character, which shows correctly in most fonts but can look slightly off in some.

Questions

What is 2026 in Roman numerals?

2026 is MMXXVI: MM for 2000, XX for 20, and VI for 6.

How do you write 4 in Roman numerals?

4 is IV, one before five. You may see IIII on clock faces, but IV is the standard form.

What is the largest Roman numeral?

With the standard letters, the largest number is 3,999, written MMMCMXCIX. Larger numbers use a line over a letter to multiply it by 1,000.

Is there a Roman numeral for zero?

No. The Romans had no symbol for zero, so the converter starts at 1.

How do I write a date in Roman numerals?

Convert the month, day and year separately and join them with dots. October 28, 2026 is X.XXVIII.MMXXVI in month, day, year order.

What does M mean in Roman numerals?

M is 1,000. The other letters are I for 1, V for 5, X for 10, L for 50, C for 100 and D for 500.

Why is 1994 MCMXCIV?

It is M (1000) + CM (900) + XC (90) + IV (4). CM, XC and IV each put a smaller letter before a bigger one to subtract it.