Convert Hex to Decimal Online
Hexadecimal (base-16) numbers appear everywhere in programming and computer science: memory addresses, color codes, ASCII values, file offsets, network packet headers, and processor registers. Being able to quickly convert hex values to decimal is a fundamental skill for developers, system programmers, and security researchers. This tool converts any hexadecimal number to its decimal (base-10) equivalent instantly, supporting hex values of any length. It accepts both uppercase (A-F) and lowercase (a-f) hexadecimal digits and handles the 0x prefix if present. The conversion is instantaneous and runs in your browser. Whether you are reading a debugger output, decoding a memory address, or working with hardware registers, this converter gives you the decimal value immediately.
Accepts input with or without 0x or # prefix.
Decimal (base 10)
Binary (base 2)
Octal (base 8)
FAQ
- How do you convert hexadecimal to decimal?
- Multiply each hex digit by 16 raised to the power of its position from the right (starting at 0), then sum the results. Use 10-15 for digits A-F. For example: 0x1F = (1×16) + (15×1) = 31.
- Do I need the 0x prefix?
- No, the converter accepts hex values with or without the 0x prefix. You can enter FF, 0xFF, or ff and all produce the same decimal result.
- What is the largest hex value supported?
- The converter handles hex values up to JavaScript's Number.MAX_SAFE_INTEGER (2^53-1). For cryptographic-length hex strings, use BigInt-capable tools.