Roman numerals converter
Convert numbers to Roman numerals and Roman numerals back to numbers.
How it works
Roman numerals use I, V, X, L, C, D and M. A smaller numeral before a larger one is subtracted, as in IV for 4 or XC for 90. Standard Roman numerals go from 1 to 3999.
Frequently asked questions
Is this tool free?
Yes. It’s free to use, with no account and nothing to install.
Is my data private?
Yes. This tool works entirely on your device: nothing you enter or open is sent to a server.
Does it work on a phone?
Yes. It works in the browser of any recent phone, tablet or computer.