Hex to Decimal Converter Tool
Accurately convert hexadecimal numbers to decimal format. Our tool explains the conversion process and handles large values. Useful for computer science, digital electronics, and programming calculations.
How it works
Enter a hexadecimal number in the input field. The converter accepts numbers with or without the "0x" prefix and handles both uppercase and lowercase letters. Paste entire columns of hex values for batch conversion.
The conversion uses BigInt arithmetic to handle arbitrarily large numbers without precision loss. Results appear instantly as you type, with the decimal value displayed in standard base-10 format.
Toggle signed mode to interpret the hex value as a two's complement signed number. This is essential for working with memory values, sensor data, or any binary data that uses signed representations.
When You'd Actually Use This
Programming Debugging
Convert memory addresses, register values, or error codes from hex dumps to understand their decimal equivalents.
Color Code Conversion
Convert hex color codes to decimal RGB values for use in applications that require separate channel values.
Data Analysis
Convert hex-encoded sensor readings, instrument outputs, or log file values to decimal for analysis.
Network Analysis
Interpret packet captures and network traces that display values in hexadecimal format.
Cryptography
Convert cryptographic hashes, keys, or encrypted values between hex and decimal representations.
Education
Learn number base conversion by seeing hex-to-decimal transformations with step-by-step verification.
What to Know Before Using
Positional notation: Each hex digit represents a power of 16. The rightmost digit is 16^0, next is 16^1, then 16^2, and so on.
Signed vs unsigned: Unsigned hex treats all bits as magnitude. Signed (two's complement) uses the highest bit as a sign indicator for negative numbers.
Leading zeros: Leading zeros don't affect the value (0x00FF = 0xFF = 255). They're often used for padding to fixed widths.
Case insensitive: Hex letters A-F and a-f represent the same values (10-15). The converter accepts either format.
Large number support: Unlike some calculators limited to 32 or 64 bits, this tool handles hex numbers of any length using BigInt.
Common Questions
How do I convert hex to decimal manually?
Multiply each digit by 16 raised to its position power, then sum. For example: 1A3 = (1×16²) + (10×16¹) + (3×16⁰) = 256 + 160 + 3 = 419.
What is 0xFF in decimal?
0xFF equals 255 in decimal. This is a common value representing maximum byte value (8 bits all set to 1) or pure red/blue/green in color codes.
How do I handle negative hex numbers?
Enable signed mode to interpret hex as two's complement. For example, 0xFF as a signed 8-bit value is -1, but as unsigned it's 255.
Can I convert decimal to hex?
This tool converts hex to decimal. For the reverse, use the decimal-to-hex converter tool which performs the opposite transformation.
What's the largest hex number I can convert?
There's no practical limit. The converter uses JavaScript BigInt which can handle numbers with thousands of digits, limited only by browser memory.
Why does my hex color have letters?
Hex colors use A-F to represent values 10-15. For example, #FF0000 is pure red (255, 0, 0). Letters allow representing all 256 values per channel in just 2 digits.
How do I convert a column of hex values?
Paste multiple hex values (one per line) into the input. The converter processes each line and displays all results for batch conversion.
Other Free Tools
Hex to Text Converter
Free Hex to Text Converter Online
Text to Hex Converter
Text to Hex Converter Online
Decimal to Hex Converter
Decimal to Hex Converter Online
Hex to Binary Converter
Hex to Binary Converter Online
Binary to Hex Converter
Binary to Hex Converter Tool
ASCII to Hex Converter
ASCII to Hex Converter: Text to Hexadecimal Translator
Barcode Generator
Free Barcode Generator
Binary to Text Converter
Binary to Text Converter
Free Printable Calendar Maker
Create & Print Your Custom Calendar
Pie Chart Maker
Free Pie Chart Maker Online