Tool Atlas Roman Numeral Converter
Convert between Roman numerals and Arabic numbers instantly. Supports values from 1 to 3999.
Quick reference
I
1
V
5
X
10
L
50
C
100
D
500
M
1000
About this tool
Instantly convert between Roman numerals and Arabic numbers. Enter a number or a Roman numeral for bidirectional conversion.
- Bidirectional conversion: Arabic to Roman and Roman to Arabic.
- Validates input and includes a quick-reference table of Roman numeral values.
- Works instantly in your browser with no server requests.
How to use this tool
- Enter your content or upload your files.
- Adjust available options for your desired output.
- Process and download or copy your result.
Tool FAQ
Is my data private?
This tool is designed for local browser processing during the MVP stage.
Can I process multiple times?
Yes. You can run the tool repeatedly with different inputs.