Hex to Decimal Converter Online Free — Instant

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Hex to Decimal — convert hexadecimal to decimal

converted in your browser

⌃⏎ run · ⎋ clear · / focus input

Hexadecimal

Decimal · base 10

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Hexadecimal · base 16

Binary · base 2

Octal · base 8

Enter a hexadecimal value above to convert it

Hex to Decimal Online

Updated 2026-07-09

Convert hexadecimal to decimal online for free. Paste a hex value — with or without a 0x prefix — and SnapTools shows its base-10 value instantly, in your browser. Nothing you enter is uploaded.

Hex is everywhere in computing — colour channels, byte values, memory addresses — but to reason about sizes and ranges you often need the plain decimal number. This converter does the positional arithmetic (each digit times a power of 16) in one step, so FF becomes 255 and 0x1A becomes 26. For every base at once, use the Number Base Converter.

// how to use

1 Paste or type a hexadecimal value into the input (a leading 0x and spaces are fine).
2 SnapTools converts it to a decimal (base-10) number as you type.
3 Copy the decimal result, or open the Number Base Converter for all bases at once.

// examples

Byte value

Input

FF

Output

With 0x prefix

Input

0x1A

Output

// common uses

Turning a hex byte or colour channel into a number Reading memory addresses or status codes as decimals Learning positional notation in base 16 Checking a manual hex-to-decimal conversion

// faq

No. The conversion runs entirely in your browser, so nothing you enter leaves your machine.

Multiply each digit by 16 raised to its position (from the right, starting at 0) and add them up. So 1A is 1×16 + 10 = 26. This tool does the arithmetic instantly.

Hexadecimal needs 16 digits, so after 9 it uses A-F for the values 10 through 15. A is 10, B is 11, up to F which is 15.

Yes. A leading 0x (or 0X) and separating spaces are ignored, so you can paste values straight from code or a debugger.

Hexadecimal only uses 0-9 and A-F. Any other character is flagged so you can correct it rather than getting a wrong number.

// related

Decimal to Hex Hex to Binary Binary to Decimal Number Base Converter Color Converter

Use this via API

Get a free API key →

curl -X POST https://snaptools.dev/api/v1/tools/hex-to-decimal \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"number":"FF"}'