Developer Tools
Hex to Decimal Converter
Convert hexadecimal to decimal numbers.
Enter the values and review the result.
Calculation assumptions
- *Hex input accepts digits 0-9 and letters A-F in either case.
- *A leading # is allowed and ignored for convenience.
- *The result is a base-10 whole number.
- *Very large hex values may hit JavaScript number precision limits.
Enter a value to convert.
Converted output will appear here.
How hex to decimal conversion works
Hexadecimal is base-16. To read it as decimal, each digit is multiplied by a power of 16, starting from the right.
Example: hexadecimal FF is 15 x 16 plus 15, which equals decimal 255.
Common mistakes
- Using characters outside 0-9 and A-F.
- Expecting color alpha or RGB channels to be split automatically.
- Using very large values without considering JavaScript precision limits.
- Confusing hexadecimal values with decimal numbers that only look similar.
Transparency note
Accuracy and limitations
Calzivo tools are built for practical estimates, conversions, and checks. Some tools use standard formulas or simplified assumptions, and results can be affected by input accuracy, rounding, units, local rules, or changing official requirements.
Results depend on the values you enter and any simplified assumptions used by the tool. Verify important results before making decisions or submitting official information.
How to Use This Tool
Use these steps to enter the right inputs and interpret the result correctly.
Enter a hexadecimal (base-16) number.
The tool will convert it to its decimal (base-10) equivalent.
You can use letters A-F in either case.
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Related Guides
Background reading and explanations related to Hex to Decimal Converter.
Frequently Asked Questions
Common questions about Hex to Decimal Converter and how to read the result.
Can I convert color codes?
Yes, you can convert individual components (R, G, or B) of a hex color code to decimal using this tool.
What is FF in decimal?
Hexadecimal FF equals decimal 255.
Is hex case-sensitive?
No. Uppercase A-F and lowercase a-f are treated the same.
Can I enter # before the value?
Yes. A leading # is removed before conversion.
Why was my input rejected?
The input may contain characters outside the hexadecimal range 0-9 and A-F.
Can very large hex values be converted?
Very large values may be affected by JavaScript number precision limits.