What is Decimal to Hex Conversion?
Decimal to hexadecimal conversion transforms familiar base-10 numbers into the base-16 format used throughout computing. When working with colors, memory addresses, or byte values, you often need to go from decimal to hex.
Type a decimal number, get its hex equivalent instantly. The output uses uppercase letters (A-F) by convention.
Why Convert to Hex?
Hexadecimal is more compact than decimal for representing binary data:
- Colors: Convert RGB values (0-255) to hex (#RRGGBB)
- Memory: Addresses are typically shown in hex
- Debugging: Byte values display more naturally in hex
- CSS/HTML: Color codes use hex format
Privacy
All conversion happens in your browser. Nothing is transmitted.
Frequently Asked Questions
How do I convert decimal to hex manually?
Repeatedly divide by 16, recording remainders. Read remainders bottom-to-top. For 255: 255÷16=15 r15, 15÷16=0 r15. Remainders 15,15 → FF.
Should I use uppercase or lowercase for hex?
Both work identically. FF equals ff. Convention varies: CSS typically uses lowercase (#ffffff), programming often uses uppercase (0xFF). Pick one and be consistent.
What's the hex value for common decimals?
10=A, 100=64, 255=FF, 256=100, 1000=3E8, 65535=FFFF. Memorizing a few common values speeds up your work.