Converters
Roman Numeral Converter
🔒 Runs in your browser
Convert between Arabic and Roman numerals (1–3999). Includes step-by-step breakdown and symbol reference.
Reference table
I
1
V
5
X
10
L
50
C
100
D
500
M
1000
How to Convert Roman Numerals — Free Online Converter (2026)
Convert between Roman numerals and decimal numbers in both directions instantly in your browser. Covers 1–3999 with full validation — free, no account, no signup.