What is hexadecimal used for?

Hexadecimal (base 16) packs four binary bits into one digit using 0-9 and A-F. It is common in colour codes, memory addresses, and byte values because it is compact and maps cleanly to binary.

What is 48879 in hex?

48879 in hexadecimal is BEEF (or 0xBEEF with the prefix). It is a popular example value because it spells a readable word using only valid hex digits.

How do the hex digits A to F work?

After 0-9, hexadecimal needs six more single-digit symbols, so it uses A=10, B=11, C=12, D=13, E=14 and F=15. This lets each digit represent values 0 through 15, exactly four binary bits.

Why is the output uppercase?

Uppercase A-F is the most common convention for hex literals and colour codes. The optional 0x prefix matches the standard C-style notation used in most programming languages.

When should I add the 0x prefix?

Use 0x when writing hex literals in code (C, JavaScript, Python and many others), so the compiler reads the value as base 16. For colour codes use # instead, and for plain reference you can leave the prefix off.

What is the largest number I can convert?

Up to 9,007,199,254,740,991, the largest integer that can be represented exactly. Larger inputs are rejected to avoid silent precision loss, and only whole, non-negative numbers are accepted.

Is my number uploaded anywhere?

No. The conversion runs entirely in your browser — nothing leaves your device.

Decimal to Hex Converter

Decimal to hex — base-10 to base-16

Enter a whole number and this tool returns its hexadecimal (base 16) value in uppercase, with an optional 0x prefix, plus the binary and octal forms. Hex is everywhere in programming — colour codes, memory addresses, byte dumps and bitmasks — so a quick, accurate converter is a daily-driver tool.

How it works

Hexadecimal is base 16, using the symbols 0-9 then A-F (A=10 through F=15). Each hex digit encodes exactly four binary bits (a nibble), which is why hex is a compact stand-in for binary. To convert, the number is repeatedly divided by 16 and the remainders — mapped to 0-9 and A-F — are read in reverse. The tool outputs uppercase digits, optionally adds the C-style 0x prefix, and also shows the binary and octal equivalents. Inputs must be whole, non-negative integers up to 9,007,199,254,740,991.

Example

Convert 48879:

48879 ÷ 16 repeatedly → digits B, E, E, F → 0xBEEF

Base	Value
Decimal (10)	48879
Hex (16)	0xBEEF
Binary (2)	1011111011101111
Octal (8)	137357

It all runs in your browser — nothing is uploaded.