HEX to
DEC Converter Online

Converting hexadecimal numbers to decimal is useful for debugging, analyzing memory dumps, and working with CSS color codes.

number-base

Input

Output

Enter a number and click Convert

Ctrl+Enter

HEX → DEC

Ctrl+↵ convert

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Decimal (DEC)

Convert from/to decimal number system

Binary (BIN)

Convert from/to binary number system

Hexadecimal (HEX)

Convert from/to hexadecimal number system

Octal (OCT)

Convert from/to octal number system

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DEC to HEX Converter Online DEC to BIN Converter Online BIN to DEC Converter Online OCT to HEX Converter Online OCT to DEC Converter Online

Frequently Asked Questions

01 How do I convert HEX to a decimal number?

Each digit of the HEX number is multiplied by the corresponding power of 16. For example, FF = 15*16 + 15 = 255. Letters A-F correspond to numbers 10-15.

02 What do the letters in HEX mean?

In hexadecimal, A=10, B=11, C=12, D=13, E=14, F=15. Case does not matter: FF and ff are the same number.

03 How is HEX used in CSS colors?

CSS colors are written as #RRGGBB, where each pair is a HEX value from 00 to FF (0-255 in DEC). For example, #FF0000 = red (R=255, G=0, B=0).

HEX to DEC Converter Online