About

Hexadecimal (Base-16) is the standard for web colors, memory addresses, and character encoding. While basic calculators handle simple conversions, they often fail to provide context for values used in CSS or data serialization. This advanced converter bridges that gap by interpreting values in multiple contexts: raw mathematics, RGB color space, and Unicode text standards.

Specifically optimized for the range 0 to 16,777,215 (the maximum value of a 24-bit color #FFFFFF), this tool instantly visualizes if a decimal number corresponds to a valid color. It also performs a reverse-lookup in the ASCII/Unicode table, helping developers debug character encoding issues where a number might represent a control character or a specific glyph.

Formulas

Hexadecimal uses 16 distinct symbols: 0-9 and A-F.

Conversion Logic:

Hex = Map(Decimal % 16)

We repeatedly divide the decimal number by 16. The remainder determines the least significant digit.

{

0-9 → 0-910 → A11 → B ... 15 → F

Reference Data

Decimal	Hexadecimal	Color / usage	ASCII/Unicode
0	00	Black (#000000)	NULL
10	0A	-	Line Feed (LF)
32	20	-	Space
65	41	-	"A"
255	FF	Blue Channel Max	"ÿ"
32,768	8000	Mid-Range	Chinese / CJK
65,535	FFFF	16-bit Max	-
16,711,680	FF0000	Red (#FF0000)	-
16,777,215	FFFFFF	White (#FFFFFF)	-

Frequently Asked Questions

The "0x" prefix is a coding convention used in C, JavaScript, Python, and Java to explicitly tell the compiler that the following number is hexadecimal. Without it, the number 10 is decimal ten; with it (0x10), it is decimal sixteen.

RGB consists of three numbers (Red, Green, Blue) from 0-255. Convert each to a 2-digit hex code. For example, RGB(255, 0, 128) becomes FF, 00, and 80. Combined: #FF0080.

Unicode has over 140,000 characters. While the hex conversion works for any size number, we only generate character previews for valid code points to ensure browser stability and font compatibility.