Roman Numerals Converter

Type a number to write it in Roman numerals, or type a Roman numeral such as MCMXCIX to read it as a number. Every answer is broken down by place value — thousands, hundreds, tens and ones — so you learn the rule, and wrong numerals get a friendly explanation of what is wrong.

Number (1 to 3999)

2026 in Roman numerals

MMXXVI

Step-by-step solution

Split 2026 by place value: 2000 + 20 + 6
2000 = MM
20 = XX
6 = VI
Join them in order: MM + XX + VI = MMXXVI

Roman numerals chart 1 to 100

Numbers 1 to 100 and their Roman numerals
1I	2II	3III	4IV	5V	6VI	7VII	8VIII	9IX	10X
11XI	12XII	13XIII	14XIV	15XV	16XVI	17XVII	18XVIII	19XIX	20XX
21XXI	22XXII	23XXIII	24XXIV	25XXV	26XXVI	27XXVII	28XXVIII	29XXIX	30XXX
31XXXI	32XXXII	33XXXIII	34XXXIV	35XXXV	36XXXVI	37XXXVII	38XXXVIII	39XXXIX	40XL
41XLI	42XLII	43XLIII	44XLIV	45XLV	46XLVI	47XLVII	48XLVIII	49XLIX	50L
51LI	52LII	53LIII	54LIV	55LV	56LVI	57LVII	58LVIII	59LIX	60LX
61LXI	62LXII	63LXIII	64LXIV	65LXV	66LXVI	67LXVII	68LXVIII	69LXIX	70LXX
71LXXI	72LXXII	73LXXIII	74LXXIV	75LXXV	76LXXVI	77LXXVII	78LXXVIII	79LXXIX	80LXXX
81LXXXI	82LXXXII	83LXXXIII	84LXXXIV	85LXXXV	86LXXXVI	87LXXXVII	88LXXXVIII	89LXXXIX	90XC
91XCI	92XCII	93XCIII	94XCIV	95XCV	96XCVI	97XCVII	98XCVIII	99XCIX	100C

How to use the roman numerals converter

Choose Number → Roman or Roman → Number.
Type a whole number from 1 to 3999, or a Roman numeral using I, V, X, L, C, D and M (small letters are fine).
Read the answer and the place-value steps. If the numeral is not valid, the message tells you which rule it breaks.
Use the chart below for quick lookups from 1 to 100.

Formulas

Symbols	`I = 1, V = 5, X = 10, L = 50, C = 100, D = 500, M = 1000`
Adding rule	`Equal or smaller letter after a bigger one → add: VI = 5 + 1 = 6`
Subtracting rule	`Smaller letter before a bigger one → subtract: IV = 4, IX = 9, XL = 40, XC = 90, CD = 400, CM = 900`
Repeating rule	`I, X, C, M repeat at most 3 times; V, L, D never repeat`

Solved examples

Example 1: Write 1987 in Roman numerals.

1987 = 1000 + 900 + 80 + 7
= M + CM + LXXX + VII

Answer: MCMLXXXVII

Example 2: What number is XLIX?

XL = 50 − 10 = 40
IX = 10 − 1 = 9
40 + 9 = 49

Answer: 49

Example 3: Write 2026 in Roman numerals.

2026 = 2000 + 20 + 6
= MM + XX + VI

Answer: MMXXVI

Why 3999 is the largest standard Roman numeral

M (1000) can be repeated only three times, so MMM is 3000 and MMMCMXCIX is 3999. Romans wrote bigger numbers by drawing a bar over a letter to multiply it by 1000 (V̄ = 5000), but that is not part of the standard system taught in school, so this converter stops at 3999. There is also no Roman numeral for zero.

Where you see Roman numerals

Clock faces, chapter and volume numbers, class names (Class IX, Class XII), years on films and buildings, and lists in exam papers (i, ii, iii). In school, Roman numerals come in Class 3–5 maths, and they appear in reasoning sections of Olympiad and competitive exams.

Frequently asked questions

How do you write 4 and 9 in Roman numerals?

4 is IV (one before five) and 9 is IX (one before ten). Writing IIII is not standard because a letter cannot repeat more than three times.

What are the Roman numerals from 1 to 10?

I, II, III, IV, V, VI, VII, VIII, IX, X.

What is 2026 in Roman numerals?

2026 = MM (2000) + XX (20) + VI (6) = MMXXVI.

Is there a Roman numeral for 0?

No. The Roman system has no symbol for zero; it starts at I (1).

Why is IC wrong for 99?

Only I can come before V or X, only X before L or C, and only C before D or M. So 99 = 90 + 9 = XC + IX = XCIX.