Decimal to Hex Converter: Your Go-To Math Sidekick

How the conversion works

Hexadecimal is base 16, using digits 0-9 and letters A-F to represent values 10-15 in each position. The tool converts your input with JavaScript's Number.toString(16), then uppercases the letters. Enter 500 and it returns 1F4: 500 = 1×256 + 15×16 + 4×1 (in hex digit positions, 1-F-4).

What the field accepts

It's a plain number input parsed with parseInt(decimal, 10), so it takes negative numbers and large integers, but not fractions — a value like 10.5 gets truncated by parseInt before conversion, so decimal input isn't reliable here. Leave it empty and you get an alert asking for a number instead of a silent result.

Reference table

255 (FF) and 4096 (1000) come up often in programming because they're one less than, and exactly, a power of two — the byte boundary and 4KB memory-page size respectively.