Number Systems
Numbers Converter
Convert between Binary, Octal, Decimal, Hexadecimal, and Roman numerals instantly.
De
Decimal(Base 10 (0-9))INPUT
—
0b
Binary(Base 2 (0-1))
0b—
0o
Octal(Base 8 (0-7))
0o—
0x
Hexadecimal(Base 16 (0-9, A-F))
0x—
Ro
Roman(Roman numerals (I-M))
—
Common Reference Values
| Decimal | Binary | Octal | Hex | Roman |
|---|---|---|---|---|
| 1 | 1 | 1 | 1 | I |
| 5 | 101 | 5 | 5 | V |
| 10 | 1010 | 12 | A | X |
| 16 | 10000 | 20 | 10 | XVI |
| 50 | 110010 | 62 | 32 | L |
| 100 | 1100100 | 144 | 64 | C |
| 255 | 11111111 | 377 | FF | CCLV |
| 500 | 111110100 | 764 | 1F4 | D |
| 1000 | 1111101000 | 1750 | 3E8 | M |
| 1024 | 10000000000 | 2000 | 400 | MXXIV |
About Number Systems
Decimal (Base 10)
The standard number system using digits 0-9. Used in everyday counting and mathematics.
Binary (Base 2)
Uses only 0 and 1. The fundamental language of computers and digital electronics.
Octal (Base 8)
Uses digits 0-7. Historically used in computing for representing file permissions.
Hexadecimal (Base 16)
Uses 0-9 and A-F. Widely used in programming for memory addresses and colors.