Decimal to Hex

Enter a decimal number and convert it to hexadecimal, octal, and binary. Results appear instantly in your browser.

Decimal
Valid: 0-9 (integers)
Hexadecimal (Base 16)
Result will appear here
Octal (Base 8)
—
Binary (Base 2)
—
Quick Reference
0→0
1→1
9→9
10→A
15→F
16→10
100→64
255→FF
256→100
4096→1000

Decimal to Hex Converter

This tool converts decimal (base 10) numbers into their hexadecimal (base 16), octal (base 8), and binary (base 2) equivalents. It is helpful when you need to represent decimal values in different number systems for programming, networking, or digital electronics.

The conversion runs entirely in your browser using JavaScript's BigNumber library for precision, so large numbers are handled correctly.

How to use

  1. Type or paste a decimal number into the input field (e.g. 255 or 4096).
  2. Click Convert to see the hexadecimal, octal, and binary results.
  3. Use the Copy button to copy the hex result to your clipboard.
  4. Click Clear to reset all fields.

What is decimal?

Decimal is the standard base 10 number system that uses the digits 0 through 9. It is the most common system for everyday counting and arithmetic. In computing, decimal values are often converted to hexadecimal or binary for low-level operations.

Example

Decimal:     255
Hexadecimal: FF
Octal:       377
Binary:      11111111