Roman numerals, dates, conversions and calculator
Roman numerals are a numbering system that was developed and used throughout the Roman Empire. This special system uses some capital letters of the Roman alphabet (I, V, X, L, C, and M) as symbols to represent certain values.
Converting Arabic Numbers and Dates to Roman Numerals
You can convert the natural number, for example 123 or the date in DD/MM/YYYY format, for example 17/09/2024
Converting Roman Numerals and Dates to Decimal Numbers (Arabic)
You can convert the number in Roman format, for example CXXIII or date in Roman format, for example "XVII / IX / MMXXIV".
Roman numeral calculator
You can calculate add (+), subtract (-), multiply (*) and divide (/) the number in Roman format, for example CXXIII - VI or CXXIII + VI.
Converting Between Roman Numerals and Decimal Numbers (Arabic). Actual year 2024 in Roman numerals. Date conversion and Roman numeral calculator.
Roman numeration
Figures (numbers, numerals) main Roman symbols and their values : I = 1 (one); V = 5 (five); X = 10 (ten); L = 50 (fifty); C = 100 (hundred); D = 500 (five hundred); M = 1,000 (one thousand); (V) = 5,000 (five thousand); (X) = 10,000 (ten thousand); (L) = 50,000 (fifty thousand); (C) = 100,000 (hundred thousand); (D) = 500,000 (five hundred thousand)The basic rules of forming Roman numerals are :
- When a symbol appears after a larger one, it is added (for example: VI = V + I = 5 + 1 = 6)
- When a symbol appears before a larger one, it is subtracted (for example: IX = X - I = 10 - 1 = 9)
- The same symbol is not used more than three times in a row.
- Numbers are read from left to right starting with the highest value symbols, or highest value set of symbols.
- Other rules
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List of the first 10,000 Roman numerals
from 0 to 100
Roman numerals, nomination (writing) and decimal equivalences.
| Roman | Nomination | Decimal |
|---|---|---|
| zero | 0 | |
| I | one | 1 |
| II | two | 2 |
| III | three | 3 |
| IV | four | 4 |
| V | five | 5 |
| VI | six | 6 |
| VII | seven | 7 |
| VIII | eight | 8 |
| IX | nine | 9 |
| X | ten | 10 |
| XI | eleven | 11 |
| XII | twelve | 12 |
| XIII | thirteen | 13 |
| XIV | fourteen | 14 |
| XV | fifteen | 15 |
| XVI | sixteen | 16 |
| XVII | seventeen | 17 |
| XVIII | eighteen | 18 |
| XIX | nineteen | 19 |
| XX | twenty | 20 |
| XXI | twenty-one | 21 |
| XXII | twenty-two | 22 |
| XXIII | twenty-three | 23 |
| XXIV | twenty-four | 24 |
| XXV | twenty-five | 25 |
| XXVI | twenty-six | 26 |
| XXVII | twenty-seven | 27 |
| XXVIII | twenty-eight | 28 |
| XXIX | twenty-nine | 29 |
| XXX | thirty | 30 |
| XXXI | thirty-one | 31 |
| XXXII | thirty-two | 32 |
| XXXIII | thirty-three | 33 |
| XXXIV | thirty-four | 34 |
| XXXV | thirty-five | 35 |
| XXXVI | thirty-six | 36 |
| XXXVII | thirty-seven | 37 |
| XXXVIII | thirty-eight | 38 |
| XXXIX | thirty-nine | 39 |
| XL | forty | 40 |
| XLI | forty-one | 41 |
| XLII | forty-two | 42 |
| XLIII | forty-three | 43 |
| XLIV | forty-four | 44 |
| XLV | forty-five | 45 |
| XLVI | forty-six | 46 |
| XLVII | forty-seven | 47 |
| XLVIII | forty-eight | 48 |
| XLIX | forty-nine | 49 |
| L | fifty | 50 |
| LI | fifty-one | 51 |
| LII | fifty-two | 52 |
| LIII | fifty-three | 53 |
| LIV | fifty-four | 54 |
| LV | fifty-five | 55 |
| LVI | fifty-six | 56 |
| LVII | fifty-seven | 57 |
| LVIII | fifty-eight | 58 |
| LIX | fifty-nine | 59 |
| LX | sixty | 60 |
| LXI | sixty-one | 61 |
| LXII | sixty-two | 62 |
| LXIII | sixty-three | 63 |
| LXIV | sixty-four | 64 |
| LXV | sixty-five | 65 |
| LXVI | sixty-six | 66 |
| LXVII | sixty-seven | 67 |
| LXVIII | sixty-eight | 68 |
| LXIX | sixty-nine | 69 |
| LXX | seventy | 70 |
| LXXI | seventy-one | 71 |
| LXXII | seventy-two | 72 |
| LXXIII | seventy-three | 73 |
| LXXIV | seventy-four | 74 |
| LXXV | seventy-five | 75 |
| LXXVI | seventy-six | 76 |
| LXXVII | seventy-seven | 77 |
| LXXVIII | seventy-eight | 78 |
| LXXIX | seventy-nine | 79 |
| LXXX | eighty | 80 |
| LXXXI | eighty-one | 81 |
| LXXXII | eighty-two | 82 |
| LXXXIII | eighty-three | 83 |
| LXXXIV | eighty-four | 84 |
| LXXXV | eighty-five | 85 |
| LXXXVI | eighty-six | 86 |
| LXXXVII | eighty-seven | 87 |
| LXXXVIII | eighty-eight | 88 |
| LXXXIX | eighty-nine | 89 |
| XC | ninety | 90 |
| XCI | ninety-one | 91 |
| XCII | ninety-two | 92 |
| XCIII | ninety-three | 93 |
| XCIV | ninety-four | 94 |
| XCV | ninety-five | 95 |
| XCVI | ninety-six | 96 |
| XCVII | ninety-seven | 97 |
| XCVIII | ninety-eight | 98 |
| XCIX | ninety-nine | 99 |