How to convert hex to decimal
Multiply each hex digit by 16 raised to its position (counting from 0 on the right), then add them up. A = 10, B = 11, up to F = 15. For 1A3: 1×256 + 10×16 + 3×1 = 419.
Common values: FF = 255 (one byte), FFFF = 65,535, and 7FFFFFFF = 2,147,483,647 (the largest signed 32-bit integer). For decimal to hex and other bases, use the number base converter.
Frequently asked questions
What is FF in decimal?
255.
What is 0x10?
16 in decimal.
How to use the Hex to Decimal Converter
- Paste the text, number or code.
- Choose encode/decode or the target format.
- Read the result instantly.
- Copy it into your code or terminal.
Why use this Hex to Decimal Converter
100% in your browser
Nothing you enter is uploaded or stored.
Instant results
Updates as you type, no waiting.
Mobile friendly
Works on phones, tablets and desktops.
Light & dark mode
Follows your mfaysal.com theme.
Free, no account
No sign-up, no limits, no watermark.
Explained
Formulas, tables and sources on the page.
Hex to Decimal Converter: chart and reference data
Source: exact arithmetic
| Decimal | Binary | Hex | Gray code | BCD |
|---|---|---|---|---|
| 0 | 0000 | 0 | 0000 | 0000 0000 |
| 1 | 0001 | 1 | 0001 | 0000 0001 |
| 2 | 0010 | 2 | 0011 | 0000 0010 |
| 3 | 0011 | 3 | 0010 | 0000 0011 |
| 4 | 0100 | 4 | 0110 | 0000 0100 |
| 5 | 0101 | 5 | 0111 | 0000 0101 |
| 6 | 0110 | 6 | 0101 | 0000 0110 |
| 7 | 0111 | 7 | 0100 | 0000 0111 |
| 8 | 1000 | 8 | 1100 | 0000 1000 |
| 9 | 1001 | 9 | 1101 | 0000 1001 |
| 10 | 1010 | A | 1111 | 0001 0000 |
| 11 | 1011 | B | 1110 | 0001 0001 |
| 12 | 1100 | C | 1010 | 0001 0010 |
| 13 | 1101 | D | 1011 | 0001 0011 |
| 14 | 1110 | E | 1001 | 0001 0100 |
| 15 | 1111 | F | 1000 | 0001 0101 |
Hex to Decimal Converter compared with the alternatives
| Option | Setup | Privacy | Speed |
|---|---|---|---|
| This tool | None | Local | Instant |
| Command line (base64, xxd) | Terminal | Local | Instant |
| Random online converter | None | May log input | Varies |
Who uses it in the UK
- Debugging APIs, URLs and HTML
- Embedded and electronics work
- Computer Science GCSE and A-level
- Inspecting data and encodings
More questions
Is it safe to paste API keys or tokens here?
The conversion runs entirely in your browser, so nothing is sent anywhere. Still, treat secrets carefully and never share decoded tokens in screenshots.
Is encoding the same as encryption?
No. Base64, URL and HTML encoding are reversible by anyone. They make data safe to transport or display, not secret.
Which standard does it follow?
Base64 follows RFC 4648, URL percent-encoding follows RFC 3986 and text is handled as UTF-8, matching modern browsers and servers.
Does it handle large inputs?
Yes, up to what your browser memory allows – typically several megabytes of text without problems.
✨ New: Remove the background from any image free – private, in your browser, transparent PNG.
Related free tools
Note: This free tool runs entirely in your browser. No data is sent or stored. Results are for information only.