The Hex to Decimal Converter accepts any hex value — with or without the 0x or # prefix, uppercase or lowercase — and gives you the decimal equivalent. Internally it uses BigInt, so 16-character hex strings (and beyond) convert without precision loss. VS Code shows this conversion in a tooltip you can't link to; this is the standalone page you can bookmark.

How to use

1. 1

   Paste or type the hex value. Prefixes 0x and # are stripped automatically; case doesn't matter.

2. 2

   Read the decimal value, along with the byte width and bit count — useful for sizing buffers and protocol fields.

3. 3

   Need the reverse? Use the Decimal to Hex Converter sister page.

Related tools

🔢 Decimal to Hex Converter 🔣 Binary Decoder 🔢 Number Base Converter 🎨 Hex Color Picker

Frequently asked questions

What's the formula for hex to decimal?

Does the prefix matter?

How big a number can it convert?

What if the input isn't valid hex?

Does this run on the server?