Loading calculator
Convert between Roman numerals and decimal, and between binary, octal, decimal, and hexadecimal.
Roman: MMXXIV
Decimal: 2024
Roman numerals use subtractive notation: IV = 4, IX = 9, XL = 40, XC = 90, CD = 400, CM = 900. This tool supports values from 1 to 3,999.
Binary
0b11111101000
Octal
0o3750
Decimal
2024
Hexadecimal
0x7E8
Binary uses digits 0–1, octal uses 0–7, decimal uses 0–9, and hexadecimal uses 0–9 plus A–F. Programmers often prefix binary values with 0b, octal with 0o, and hexadecimal with 0x.