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Roman Numeral Calculator

Roman Numeral Calculator
Enter Roman numerals and/or numbers
 
=
?
Answer:

DCCXXVI + XLVIII = DCCLXXIV
(Roman numerals)

726 + 48 = 774
(Arabic numbers)


Steps starting with the input:
DCCXXVI + XLVIII

Convert any subtractive notation to additive notation to get:
DCCXXVI + XXXXVIII

Combine the two numerals into one to get:
DCCXXVIXXXXVIII

Sort the symbols highest to lowest to get:
DCCXXXXXXVVIIII

Simplify by replacing symbols, from right to left:
Replace “VV” with “X” to get
DCCXXXXXXXIIII
Replace “XXXXX” with “L” to get
DCCLXXIIII

Convert any additive notation back to subtractive notation to get:
DCCLXXIV

Answer:
DCCLXXIV


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Calculator Use

Add, subtract, multiply and divide Roman numerals from I to MMMCMXCIX and/or numbers from 1 to 3999. Get answers in Roman numerals and regular numbers. This Roman numeral calculator shows the answer with steps when you add or subtract Roman numerals.

See the Roman Numeral Converter to convert between Roman numerals and numbers.

Your answer may contain Roman numerals with an overline. An overline means that the value of the Roman numeral is multiplied by 1,000. See the chart below for Roman numeral values and overline values.

Roman Numeral Chart
Roman
Numeral
Number
Value
I
1
V
5
X
10
L
50
C
100
D
500
M
1,000
I
1,000
V
5,000
X
10,000
L
50,000
C
100,000
D
500,000
M
1,000,000

Roman Numeral Notation

Roman numerals are written in additive and subtractive notation. Additive notation means that the individual values in a Roman numeral are added together to get the total value. In the case of VIII you add up the values for V and three I's. V is 5 and I is 1, so 5+1+1+1 = 8.

Subtractive notation means that value of the Roman numeral is found by taking the last character value and subtracting the value of the character that comes just before it. In the case of XC you subtract the value of X from the value of C. X is 10 and C is 100, so 100-10 = 90.

Roman Numeral Notation
Subtractive and Additive
Numeral
Value
Subtractive
Notation
Additive
Notation
4
IV
IIII
9
IX
VIIII
40
XL
XXXX
90
XC
LXXXX
400
CD
CCCC
900
CM
DCCCC
4000
IV
MMMM
9000
IX
VMMMM
40,000
XL
XXXX
90,000
XC
LXXXX
400,000
CD
CCCC
900,000
CM
DCCCC

Related Calculators

The Roman Numeral Converter lets you convert regular numbers into Roman numerals, or Roman numerals into numbers.

The Roman Numeral Date Converter lets you convert dates into Roman numerals, or Roman numerals into number dates.

 

Cite this content, page or calculator as:

Furey, Edward "Roman Numeral Calculator"; from https://www.calculatorsoup.com - Online Calculator Resource.

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