Hex to Decimal Converter

Convert hexadecimal to decimal using base-16 multiplication

Hex Input
Decimal Result
255
Hex: FF
Binary: 11111111

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How Hex to Decimal Conversion Works

Hexadecimal (base-16) uses digits 0-9 and A-F representing values 10-15. To convert to decimal, multiply each digit by 16 raised to its position power. For FF: (15×16¹) + (15×16⁰) = 240 + 15 = 255. Used extensively in memory addresses, color codes, and low-level programming.

Frequently Asked Questions

Why use hexadecimal?
Hex is more compact than binary (1 hex digit = 4 bits) and easier to read. Memory addresses, color codes (#FF5733), and machine code are commonly represented in hex.
What's the largest hex I can convert?
Our converter handles up to 32-bit values (FFFFFFFF = 4294967295). For larger numbers, use 64-bit mode or our Big Number tool.
How do I convert hex with 0x prefix?
Our auto-detect handles 0xFF format automatically. You can also select "With 0x prefix" from the format dropdown.