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Hazuu Tools

Hex to Decimal

Convert hexadecimal numbers to decimal — enter, convert, and copy instantly.

Input Hex
Output Decimal
Decimal output will appear here...
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About Hex to Decimal Converter

Hexadecimal to decimal conversion translates base-16 numbers — using the digits 0-9 and the letters A through F — into the base-10 integers that humans and most everyday software work with naturally. In computing, hex is the dominant shorthand for binary data: CSS color codes like #ff6600, memory addresses in debuggers, MAC addresses on network cards, and Windows error stop codes are all written in hex because each hex digit packs exactly four bits, making 8-bit bytes readable as just two characters. To make sense of those values as numbers you can calculate with or compare against documentation, you need to translate them back to decimal.

This tool handles any valid hex string from a single digit up to values too large for standard 64-bit integers, using JavaScript BigInt to preserve full precision at any scale. You can paste a single value like 0x3e8 or drop an entire column of hex addresses and convert them all at once — one per line, with or without the 0x prefix. The result appears alongside the input as a matching list of decimal integers, ready to copy in one click.

Every conversion runs entirely inside your browser. No hex values, memory addresses, or error codes are uploaded, logged, or transmitted to any server. The tool is completely free with no account required, making it safe to use even with sensitive values from internal systems or proprietary hardware documentation.

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Key Features

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BigInt precision for large values

Hex strings longer than 13 digits are converted using JavaScript BigInt, so values like large memory addresses or 64-bit identifiers come out exactly right with no floating-point rounding.

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Batch conversion, one value per line

Paste an entire column of hex values and get back a matching column of decimal integers. Each line is converted independently, blank lines are preserved as blank lines.

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0x prefix stripped automatically

Values copied from debuggers or source code often include a 0x or 0X prefix. The tool removes it before conversion so you never have to clean your input manually.

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Input validation with clear errors

If any character outside 0-9 and A-F appears in a line, the tool flags the specific error immediately rather than silently returning a wrong number.

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100% client-side, always private

All computation happens in your browser. Memory addresses, error codes, and identifiers from proprietary systems never leave your machine.

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One-click copy

Copy the full decimal output to your clipboard in a single click and paste it straight into your spreadsheet, script, or documentation.

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How to Use

01

Enter Hex Number

Type or paste your hexadecimal number into the input area. You can enter multiple numbers on separate lines for batch conversion. A 0x prefix is automatically removed.

02

Convert

Click "Convert" to calculate the decimal equivalent of your hex input. Each line is converted independently.

03

Copy Result

Copy the decimal result to your clipboard with one click using the copy button in the toolbar.

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Example

Each hex value on its own line is converted to its decimal equivalent. The 0x prefix is stripped automatically.

Hex input
ff
a
10
3e8
ffff
Decimal output
255
10
16
1000
65535
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Common Use Cases

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    Decoding CSS and design color codes

    Color values in CSS, design tokens, and image metadata arrive as hex triplets like #ff6600. Converting each channel to decimal lets you check actual RGB values, compare brightness, or feed the numbers into color-math formulas — something none of the related hex converters are optimised for.

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    Reading debugger memory addresses

    Memory addresses in gdb, lldb, WinDbg, and similar tools are printed in hex. Converting them to decimal makes pointer arithmetic easier to verify and lets you cross-reference offset tables that use decimal notation.

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    Interpreting Windows and hardware error codes

    Stop codes (0x0000007E), USB Product IDs, and PCI device identifiers are all published in hex. Translating them to decimal is the first step when searching vendor datasheets or driver documentation that lists decimal equivalents.

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    Processing exported data from embedded systems

    Sensor firmware, microcontroller logs, and CAN bus captures frequently encode register values in hex. Converting a batch of readings to decimal makes them ready for spreadsheet analysis without any manual arithmetic.

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    Teaching base-16 arithmetic

    Students learning number systems can enter a hex value, work out the expected decimal result by hand, and immediately verify their calculation. The one-value-per-line format makes it practical to check a whole homework problem set at once.

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Frequently Asked Questions

What is hex to decimal conversion? expand_more
Hex to decimal conversion translates a base-16 number (using digits 0-9 and letters A-F) into a base-10 number. Each hex digit represents a power of 16 — for example, hex ff equals 15 x 16 + 15 = 255 in decimal, and hex 3e8 equals 3 x 256 + 14 x 16 + 8 = 1000 in decimal.
How does hex to decimal conversion work? expand_more
Each hexadecimal digit is multiplied by the corresponding power of 16 based on its position, then all the products are summed. For example, hex 1a is calculated as 1 x 16 + 10 x 1 = 26 in decimal. The tool uses parseInt(hex, 16) for values up to 13 digits and JavaScript BigInt for anything larger.
Can this tool handle very large hex numbers? expand_more
Yes. Hex strings longer than 13 characters exceed the safe integer range of standard JavaScript numbers. The tool detects this and switches to BigInt automatically, so values like large memory addresses or 64-bit identifiers are converted with full precision and no rounding error.
Does it accept the 0x prefix? expand_more
Yes. The tool strips any leading 0x or 0X before conversion, so you can paste values directly from source code or debugger output without editing them first.
How is hex to decimal different from hex to binary? expand_more
Hex to decimal converts a base-16 value into a base-10 integer — the everyday number format used in spreadsheets, documentation, and arithmetic. Hex to binary converts the same value into a string of 1s and 0s, which is useful for inspecting individual bit flags or understanding bitwise operations. If you need a number to calculate with, use this tool; if you need to examine specific bits, use hex to binary.
How is this different from the decimal to hex converter? expand_more
The decimal to hex converter goes in the opposite direction — it takes a base-10 number and produces a hex string. Use that tool when you are writing code or documentation that requires hex notation. Use this tool when you already have a hex value and need to understand or calculate with the decimal equivalent.
Can I convert multiple hex values at once? expand_more
Yes. Enter one hex value per line and click Convert. The output will contain a matching list of decimal numbers in the same order, with blank lines preserved so the two columns stay aligned.
Is my data secure? expand_more
All conversion happens entirely in your browser using client-side JavaScript. No data is sent to any server, so memory addresses, error codes, or identifiers from proprietary hardware stay completely private on your own machine.