Decimal to Hex Converter — Free Online Decimal to Hexadecimal Tool
Convert decimal (base 10) numbers to hexadecimal (base 16) instantly — supports batch conversion and swap direction.
Jump to tool ↓Tip: Enter multiple values (one per line) for batch conversion.
Frequently Asked Questions
Decimal to Hexadecimal Conversion Explained
Converting decimal to hexadecimal is a fundamental operation in programming, especially when working with memory, colors, binary protocols, or hardware. Decimal is the number system you're born with — hexadecimal is the one every developer eventually learns.
The algorithm is simple: divide by 16, note the remainder (0–9 stay as digits, 10–15 become A–F), repeat until the quotient is 0, then read remainders in reverse. For 255: 255÷16=15 rem 15 (F), 15÷16=0 rem 15 (F), giving FF. This tool uses number.toString(16).toUpperCase() for instant results.
Practical applications: CSS color values (RGB to hex for design tools), IPv4 addresses in hex for network programming, character codes for encoding, and bitmask flags in system programming where hex representation makes the bit patterns obvious.
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