**Brief: This guide explores various ways that you can use to convert hexadecimal to decimal values in Linux bash scripting.**

In computing, there are four types of numbers and they are **Decimal**, **Binary**, **Octal**, and **Hexadecimal**.

- The
**decimal**system is used for general calculation and represents the base-10 number system. - The
**binary**number system is base-2 and the primary language of computer systems. Without it, computers wouldn’t exist. It’s the basis for storing and transmitting digital data and uses two values to perform computations; 0 and 1. - The
**octal**notation is a base-8 and is represented by digits 0 to 7. - The
**hexadecimal**notation uses 0 to 9 and A to F characters to represent the number.

In bash scripting, you can convert one number system to another and that is precisely what this guide is all about.

Page Contents

### Convert Hexadecimal to Decimal Using echo Command

There are several ways of converting hexadecimal numbers to decimal in bash. The simplest way is running the following **echo command** where **hex-number** is the hexadecimal digit.

$ echo $((16#hex-number)

For example, to convert the hexadecimal 75 number to decimal, run the following command on the shell prompt.

$ echo $((16#75))

You should get the following output on the terminal.

### Convert Hexadecimal to Decimal Using BC Command

**BC** (short for **basic calculator**) is an arbitrary calculator language and compiler that is typically used either as an interactive mathematical shell or a mathematical scripting language.

**BC** comes installed by default on modern Linux distributions. You can confirm this by running the command:

$ bcbc 1.07.1 Copyright 1991-1994, 1997, 1998, 2000, 2004, 2006, 2008, 2012-2017 Free Software Foundation, Inc. This is free software with ABSOLUTELY NO WARRANTY. For details type `warranty'.

To quit the prompt, type **quit** and press **ENTER**.

To convert a hexadecimal value to a decimal using **bc**, use the following syntax with the **ibase** value set to **16**.

$ echo "ibase=16; hex-number"|bc

For example, to convert the hexadecimal value **FF1A**, run the following on the shell.

$ echo "ibase=16;FF1A"|bc

### Convert Hexadecimal to Decimal Using the printf Command

The bash **printf** command is used to print formatted text to stdout or on the screen. It is the equivalent of the `printf()`

function in Java, C, and C++ to mention a few examples.

To convert a hexadecimal value to a decimal one using the **printf** command, use the following syntax.

$ printf "%d\n" 0xhex-number

For example, to convert the hexadecimal value **AADF** to a decimal value using the printf shell function, run the following shell command:

$ printf "%d\n" 0xAADF

##### Conclusion

That was a walkthrough of the different ways you can use to convert hexadecimal to decimal values in a Linux bash shell. Any additional ideas that you might have up your sleeves? Do let us know.

@Pradeep,

Glad that my article helped you to convert hexadecimal to decimal values…

You can also achieve the same results using the

wcalccommand, which is a command-line calculator created to perform all valid mathematical expressions in a Linux shell…Hi,

Thanks for sharing the tip…

I managed to convert hexadecimal representation to decimal numbers using the

printfcommand in the bash shell.@Pradeep,

Keep visiting our site to know more about such Linux command-line tips…