CSS white
- Input
- 16777215₁₀
- Expected output
- 0xFFFFFF
Pure white in RGB.
decimal to hexadecimal
Decimal to Hexadecimal Converter
Decimal to hex with 0x prefix. Each hex digit represents 4 bits — the standard format for CSS colors and memory addresses.
Why hex is so common in programming
- Hexadecimal is a compact way to represent binary: 8 bits (1 byte) fit in just 2 hex digits. 255₁₀ = FF₁₆.
- CSS RGB colors use hex: #RRGGBB, where each component ranges from 00 to FF (0 to 255 in decimal).
Examples
HTTP port
- Input
- 8080₁₀
- Expected output
- 0x1F90
Alternate HTTP port in hex.
Full tool FAQ
Converting a number between bases means representing the same value using a different set of digits. A decimal (base 10) number can be expressed exactly in binary (base 2), hexadecimal (base 16), or any other base.
Frequently asked questions
Is the 0x prefix included?
Yes. The default output includes the 0x prefix for hexadecimal.
Are hex letters upper or lowercase?
The tool uses uppercase letters (A–F) in the hexadecimal output.