Roman Numeral Converter
Convert numbers to Roman numerals and Roman numerals to numbers online for free. Supports values from 1 to 3,999,999.
Runs entirely in your browser — files never uploaded
Reference Table
I1
V5
X10
L50
C100
D500
M1,000
V̅5,000
X̅10,000
L̅50,000
C̅100,000
D̅500,000
M̅1,000,000
How to use Roman Numeral Converter
- 1. Choose direction. Select whether to convert a number to Roman numerals or a Roman numeral to a number.
- 2. Enter your value. Type a number (1-3,999,999) or a Roman numeral into the input field.
- 3. Copy the result. The conversion happens instantly. Click Copy to save the result to your clipboard.
FAQ
What is the largest number supported?
Standard Roman numerals go up to 3,999 (MMMCMXCIX). This tool also supports vinculum notation (overline) for values up to 3,999,999.
What is vinculum notation?
A bar (overline) above a Roman numeral multiplies its value by 1,000. For example, V with a bar means 5,000.
Is the conversion case-sensitive?
No. You can enter Roman numerals in lowercase or uppercase and the tool will convert them correctly.
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