About ローマ数字変換
ローマ数字とアラビア数字間で変換
Use this free online 数学ツール tool to work faster without installing extra software. The interface is built for quick input, clear output, and straightforward results on desktop and mobile devices.
ローマ数字とアラビア数字間で変換
Decimal to Roman
Roman to Decimal
Roman Numeral Reference
I
1
V
5
X
10
L
50
C
100
D
500
M
1000
Common Conversions
1. Symbols are added from left to right (largest to smallest)
2. A smaller symbol before a larger one means subtraction (IV = 4)
3. A symbol can only be repeated up to 3 times consecutively
4. Only I, X, and C can be used for subtraction
5. Valid range: 1 to 3999
ローマ数字とアラビア数字間で変換
Use this free online 数学ツール tool to work faster without installing extra software. The interface is built for quick input, clear output, and straightforward results on desktop and mobile devices.
This tool runs in your browser whenever possible, which keeps your inputs private and reduces unnecessary round-trips to the server.