Roman to decimal converter

Welcome to our Roman Numerals Converter – your go-to tool for effortlessly working with Roman numbers!

Decimal (Arabic)
Roman numerals

Roman numbers are an ancient system of writing numbers using letters such as I, V, X, L, C, D, and M. Decimal numbers are also known as arabic or integer numbers and use digits from 0 to 9.

There are 7 numbers in roman numeral system:


Convert decimal tor roman numbers

To convert from decimal to roman, you need to find the closest roman numeral that is less than or equal to the decimal number and subtract it from the decimal number. Then repeat this process until the decimal number becomes zero. For example, to convert 2024 to roman, you can do:

2021 - 1000 = 1024, so write M

1021 - 1000 = 24, so write another M

24 - 10 = 14, so write X

14 - 10 = 4, so write another X

4-5 = -1, so write I and then V

The final result is MMXXIV.

Convert from roman to decimal

To convert from roman to decimal, you need to add the values of the roman numerals from left to right, unless a smaller numeral comes before a larger one, in which case you need to subtract the smaller value from the larger one. For example, to convert MMXXIV to decimal, you can do:

M + M = 1000 + 1000 = 2000

X + X = 10 + 10 = 20

IV = 5-1 = 4

The final result is 2000 + 20 + 5 - 1 = 2024.

Automated conversions

As you can see conversions are not too complicated, but very time consuming. You can use this converter to easily convert numbers from roman to decimal and from decimal to roman. Just enter the number in the corresponding field (decimal or roman). The converter will show you the result in the other system. Try it now and have fun with roman numerals!