Roman numerals
- Converts roman numbers to decimal and decimal to roman number.
- Calculates operations on roman numbers (addition, subtraction, multiplication and division).
- Calculates operations on roman numbers (addition, subtraction, multiplication and division).
Roman Numerals
This calculator converts roman numbers into arabic numbers and vice versa. It also calculates basic operations on roman numbers. It uses historical roman numeral system i.e. numbers from I to MMMCMXCIX (that is 1 to 3999 in decimal system).
The seven symbols of the roman numeral system
| Roman numerals | I | V | X | L | C | D | M |
| Arabic numerals | 1 | 5 | 10 | 50 | 100 | 500 | 1000 |
The decimal system in roman numerals
| Arabic numerals | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| Roman numerals | I | II | III | IV | V | VI | VII | VIII | IX |
- In this représentation, the digit zero does not exist.
- The highest number represented in the historical version of the roman system is MMMCMXCIX (=3999). Later, an extension was invented to represent high numbers beyond 3999. It uses derived symbols with an overline.
Roman numerals system extension
This extension is not used in this calculator so we use only historical roman system.
| Roman numerals | `overline V` | `overline X` | `overline L` | `overline C` | `overline D` | `overline M` |
| Arabic numerals | 5000 | 10000 | 50000 | 100000 | 500000 | 1000000 |
Roman numbers conversion table
| 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 |
| 200 : CC |
| 250 : CCL |
| 300 : CCC |
| 350 : CCCL |
| 400 : CD |
| 450 : CDL |
| 500 : D |
| 550 : DL |
| 600 : DC |
| 650 : DCL |
| 700 : DCC |
| 750 : DCCL |
| 800 : DCCC |
| 850 : DCCCL |
| 900 : CM |
| 950 : CML |
| 1000 : M |
See also
Number Calculators
Mathematics Calculators