Roman Numerals Calculator — Add, Subtract, Multiply & Divide
Perform arithmetic operations with Roman numerals. Enter two Roman numeral values, select an operation, and get the result in both Roman and Arabic format. Our calculator provides Roman numerals to Arabic numbers translation for better understanding. See also our Roman Numeral Converter and Date to Roman Numerals.
Enter the value that you want to calculate roman numeral.
Online Roman Numerals Calculator:
Our online roman numerals calculator provides you with addition, subtraction, multiplication, and division of roman numerals. Our roman numerals calculator provides you roman numerals to Arabic numbers translation for better understanding.
About Roman Numerals:
Roman Empire is well known for their intelligence and development — they developed a numeral system for easy business trading. Roman numerals system are standard numbering system used in roman. It is originated from ancient Rome and used the Latin alphabet to represent numbers.
- It has seven letters namely I, V, X, L, C, D, and M.
- In between 800 to 900 BC firstly this numbering system was used.
- Each letter has its own value: I = 1, V = 5, X = 10, L = 50, C = 100, D = 500, M = 1000.
- All numbers are formed by using these letters with specific rules.
- If a lower value letter placed before a higher value letter then it would be subtracted. For example, 4 is represented as "IV" — "I" is written before "V" so we subtract I from V.
- You cannot use the same letter more than three times. For example, CCC = 300 but CCCC is not valid — 400 is written as CD.
- You cannot subtract a number that is 10 times higher. For example, 99 = XCIX but you cannot write IC.
- The maximum number formed by I, V, X, L, C, D, and M is 3999 (MMMCMXCIX).
How to use roman numerals calculator?
- Open Roman Numerals Calculator.
- Enter 1st and 2nd roman numerals in their appropriate fields.
- Select the operator: addition, subtract, divide, or multiply to perform.
- Click on Calculate to get the result.
- The result shows in both Roman numeral and Arabic (decimal) format.
Roman Numerals Arithmetic Formula
Roman Numeral Values:
I = 1 V = 5 X = 10 L = 50
C = 100 D = 500 M = 1000
Subtractive Combinations:
IV = 4 IX = 9 XL = 40 XC = 90
CD = 400 CM = 900
Arithmetic Process:
Step 1: Convert Roman → Decimal
Step 2: Perform operation (+, -, ×, ÷)
Step 3: Convert result Decimal → Roman
Examples:
XIV + III = 14 + 3 = 17 = XVII
L - XX = 50 - 20 = 30 = XXX
VII × IV = 7 × 4 = 28 = XXVIII
C ÷ V = 100 ÷ 5 = 20 = XX
MCMXCIX + I = 1999 + 1 = 2000 = MMRoman Numerals 1 to 100 Chart
| Number | Roman | Number | Roman | Number | Roman | Number | Roman |
|---|---|---|---|---|---|---|---|
| 1 | I | 26 | XXVI | 51 | LI | 76 | LXXVI |
| 2 | II | 27 | XXVII | 52 | LII | 77 | LXXVII |
| 3 | III | 28 | XXVIII | 53 | LIII | 78 | LXXVIII |
| 4 | IV | 29 | XXIX | 54 | LIV | 79 | LXXIX |
| 5 | V | 30 | XXX | 55 | LV | 80 | LXXX |
| 6 | VI | 31 | XXXI | 56 | LVI | 81 | LXXXI |
| 7 | VII | 32 | XXXII | 57 | LVII | 82 | LXXXII |
| 8 | VIII | 33 | XXXIII | 58 | LVIII | 83 | LXXXIII |
| 9 | IX | 34 | XXXIV | 59 | LIX | 84 | LXXXIV |
| 10 | X | 35 | XXXV | 60 | LX | 85 | LXXXV |
| 11 | XI | 36 | XXXVI | 61 | LXI | 86 | LXXXVI |
| 12 | XII | 37 | XXXVII | 62 | LXII | 87 | LXXXVII |
| 13 | XIII | 38 | XXXVIII | 63 | LXIII | 88 | LXXXVIII |
| 14 | XIV | 39 | XXXIX | 64 | LXIV | 89 | LXXXIX |
| 15 | XV | 40 | XL | 65 | LXV | 90 | XC |
| 16 | XVI | 41 | XLI | 66 | LXVI | 91 | XCI |
| 17 | XVII | 42 | XLII | 67 | LXVII | 92 | XCII |
| 18 | XVIII | 43 | XLIII | 68 | LXVIII | 93 | XCIII |
| 19 | XIX | 44 | XLIV | 69 | LXIX | 94 | XCIV |
| 20 | XX | 45 | XLV | 70 | LXX | 95 | XCV |
| 21 | XXI | 46 | XLVI | 71 | LXXI | 96 | XCVI |
| 22 | XXII | 47 | XLVII | 72 | LXXII | 97 | XCVII |
| 23 | XXIII | 48 | XLVIII | 73 | LXXIII | 98 | XCVIII |
| 24 | XXIV | 49 | XLIX | 74 | LXXIV | 99 | XCIX |
| 25 | XXV | 50 | L | 75 | LXXV | 100 | C |
Frequently Asked Questions
How do you add Roman numerals?
Convert both Roman numerals to decimal numbers, add them, then convert the sum back to Roman numerals. Example: XIV + III = 14 + 3 = 17 = XVII.
What is the maximum Roman numeral?
Using standard notation, the maximum is MMMCMXCIX = 3999. To write higher numbers, an overline is used to multiply by 1000 (e.g., V̅ = 5000).
Can you multiply Roman numerals?
Yes. Convert to decimal, multiply, then convert back. Example: VII × IV = 7 × 4 = 28 = XXVIII. The result must be between 1 and 3999.
What are the 7 Roman numeral symbols?
I (1), V (5), X (10), L (50), C (100), D (500), and M (1000). All Roman numerals are formed by combining these seven symbols.
Why can't you repeat a letter more than 3 times?
This rule keeps numbers compact using subtractive notation. Instead of IIII for 4, write IV (5-1). Instead of CCCC for 400, write CD (500-100).
Objective of Measurement:
Measurement is the most important aspect of our life. We use measurement in science, engineering, business trading, personal life, education, and more other fields. As technology is growing day by day so we need a highly accurate and easy convenient global measuring system in each and every field. It is essential to use standard measurement in every field that everyone to be sure that they not get cheated.
History of Measurement:
In history for measurement people used the human body as a tool. For measuring length used forearm, hand, foot & finger as a unit. The foot, finger is a subdivided shorter unit of a length. This type of measurement is not accurate cause different in size of the arm & finger for different people & some of the countries still using it. In history, there were lots of measuring systems developed but mostly used imperial, the metric system of measurement. We use these systems for measure distances, volume, weight, speed, area etc. Due to this a major problem everyone is facing while doing trading between the countries. A huge improvement in civilization, It necessary to improve measuring standards. Nowadays International Standard (SI) units are used as a global measurement system.