Python Tutorial



Python Tutorial

Binary to Decimal in Python


In the vast realm of programming, a profound grasp of data representation is nothing short of imperative. At its very core lies a pivotal concept - the conversion of binary to decimals in Python. This intricate process serves as the bedrock for an array of computational tasks, bridging diverse numeric systems and finding relevance in a plethora of real-world applications.

Embark on this comprehensive odyssey as we unravel the nuances of binary-to-decimal conversion within the Python programming domain. This expedition is your key to acquiring not only knowledge but also the tools essential for the seamless manipulation of numeric data across a myriad of domains, spanning from scientific computing to the intricate world of web development.


Our journey commences with an elucidation of the very concept of binary-to-decimal conversion. It serves as our gateway, setting the stage for what lies ahead. We then embark on a voyage through an array of methods and techniques at our disposal within Python, enabling us to execute this conversion seamlessly. Through a compendium of illustrative examples, succinct code fragments, and in-depth elucidations, you will not only grasp these techniques but also acquire the skill set necessary to navigate the exigencies of real-world problems where binary-to-decimal conversion is indispensable.

By the time we conclude this expedition, you will have gained a profound understanding of binary-to-decimal conversion, unlocking its essential role across an extensive spectrum of applications, encompassing network programming, data analysis, and far beyond. This article provides a holistic comprehension of the entire process, from theory to pragmatic implementation.

Decimal to Binary

Understanding Numeric Systems

To appreciate binary-to-decimal conversion, it's crucial to understand how numeric systems work. We'll briefly delve into the concepts of binary and decimal systems, highlighting their differences and significance.

Binary numbers are base-2 numbers, using only two digits, 0 and 1. Decimal numbers are base-10 numbers, using digits 0 through 9. This fundamental distinction is at the core of our conversion process.

Converting Decimal to Binary

We'll provide a step-by-step explanation of how to convert decimal numbers to binary in Python. The process involves dividing the decimal number and keeping track of remainders, resulting in the binary representation.

Example 1: Converting Decimal to Binary

decimal_number = 10 binary_
representation = bin(decimal_number)
print(binary_representation) # Output: '0b1010'

Here, we convert decimal 10 to binary using the built-in bin() function. The result is the binary representation '0b1010,' where '0b' indicates that it's a binary representation.

Example 2: Converting Decimal to Binary (Manually)

decimal_number = 25 
binary_result = "" 
while decimal_number > 0: 
remainder = decimal_number % 2 
binary_result = str(remainder) binary_result 
decimal_number = decimal_number // 2 
print(binary_result) # Output: '11001'

Here, we perform the conversion manually, showing the step-by-step process of finding remainders and building the binary representation.

Decimal to Binary Using bin()

The bin() function is a convenient tool in Python for converting decimal numbers to binary. Understanding its advantages can help streamline your coding tasks.

Example: Using bin() Function

decimal_number = 10 
binary_representation = 
bin(decimal_number)print(binary_representation) # Output: '0b1010'

The bin() function takes a decimal number as input and returns its binary representation as a string. 

Binary to Decimal

The Need for Binary to Decimal Conversion

Why would you want to convert binary to decimal in Python? We'll explore the practical applications, such as working with hardware, network protocols, and data storage, where this conversion is indispensable.

Example: Network Protocol Addresses

Consider an IP address like '' IP addresses use binary data behind the scenes for routing data packets across networks. Understanding binary to decimal in Java conversion is vital when working with IP addresses and network protocols.

Binary to Decimal Using int()

Another method for binary to decimal in Python conversion is using the int() function. We'll provide a comprehensive guide, including code snippets, step-by-step instructions, and comparisons with alternative approaches.

Example: Using int() Function

binary_string = '1010' 
decimal_value = int(binary_string, 2) 
print(decimal_value) # Output: 10

Here, we convert the binary string '1010' to its decimal equivalent using the int() function. It shows how to convert string to binary in Python. The second argument, '2', specifies that the input is in base-2 (binary).

Example: Converting an IPv4 Address

In networking, IP addresses are often represented in binary format. Let's convert an IPv4 address from binary to decimal in Python:

binary_ip = '11000000101010000000000100000001' 
decimal_ip = '.'.join(str(int(binary_ip[i:i 8], 2)) for i in range(0, 32, 8)) 
print(decimal_ip) # Output: ''

Method: Using Format Specifier

Sometimes, precision is essential in numeric conversions. We'll introduce a method that uses format specifiers to perform binary-to-decimal and binary-to-octal in Python. 

Example: Using Format Specifier

binary_value = 1010 
decimal_formatted = "{:d}".format(binary_value)
print(decimal_formatted) # Output: '1010'

Here, we use a format specifier to convert the binary value '1010' to a decimal string. The "{:d}" specifier indicates that the value should be treated as an integer.

Example: Formatting Binary Data from a Sensor

Imagine you have sensor data in binary format that you need to convert and format for analysis. you will need a Python program to convert binary to decimal, octal, and hexadecimal:

sensor_data_binary = '0010110001101001' 
sensor_data_decimal = int(sensor_data_binary, 2) 
formatted_sensor_data = "{:.2f}".format(sensor_data_decimal / 100.0)
print(formatted_sensor_data) # Output: '172.09'

In this example, we convert binary sensor data to decimal and format it with two decimal places for better readability.

Built-in Format Function

Python offers built-in functions that can simplify complex tasks. The built-in format function is one such tool that can be employed for binary-to-decimal and octal-to-hexadecimal in Python conversion. 

Example: Using the Built-in Format Function

binary_number = 1010 
decimal_formatted = format(binary_number, 'd')
print(decimal_formatted) # Output: '1010'

In this example, we use the format() function to convert the binary number '1010' to a decimal string. The 'd' format specifier indicates a decimal output.

Example: Formatting Currency Amounts

In financial applications, you may need to format currency amounts obtained from binary data:

binary_amount = '1101101000110011' 
decimal_amount = int(binary_amount, 2) formatted_amount = "${:,.2f}".format(decimal_amount / 100.0) 
print(formatted_amount) # Output: '$53,07.87'

Here, we convert binary financial data to decimals and format it as a currency amount.

Examples of Binary to Decimal in Python

To solidify your understanding, we'll present a variety of real-world examples showcasing binary to decimal in Python conversion. These examples will cover scenarios from simple to advanced, with detailed explanations, code snippets, screenshots, and images. By the end, you'll comprehensively understand how to apply these concepts in practice.

Example 1: Converting MAC Addresses

Media Access Control (MAC) addresses are often represented in binary format in networking. Converting these addresses to decimal is essential for various network operations.

Converting a MAC Address from Binary to Decimal

mac_address_binary = '10101000110111001010101110110011011001001100101110101'
mac_address_decimal = int(mac_address_binary, 2) 

This example demonstrates how to convert a binary MAC address to its decimal representation.

Example 2: File Handling

When working with binary data in files, understanding binary-to-decimal conversion is crucial. Let's say you're reading a binary file with numeric data and need to interpret those values in decimal format.

Example 3: Reading Binary Data from a File and Converting to Decimal

with open('binary_data_file.bin', 'rb') as file: 
binary_data = 
decimal_values = [int(byte, 2) for byte in binary_data] 

In this example, we read binary data from a file and convert each byte to its decimal equivalent.

Example 4: Analyzing Temperature Data

Consider a scenario where you have binary sensor data stored in a file. You need to read and convert this data for temperature analysis:

binary_sensor_data = '0011100100101100' # Example sensor data in binary
decimal_sensor_data = int(binary_sensor_data, 2) 
temperature_celsius = decimal_sensor_data / 10.0 
print(f"Temperature: {temperature_celsius}°C")

This example shows how to read and convert binary sensor data from a file, providing temperature readings in degrees Celsius.

Example 5: Digital Electronics

In the field of digital electronics, binary numbers are prevalent. Converting binary representations to decimals is essential for various electronic systems.

Binary to Decimal Conversion in Digital Electronics

binary_data = [1, 0, 1, 0, 1, 1, 0, 0] 
decimal_value = sum(b * 2**i for i, b innumerate(reversed(binary_data))) 

This example showcases how binary-to-decimal conversion is used in digital electronics by converting a binary list to decimal using a mathematical formula.

Driving Seven-Segment Displays

Seven-segment displays are commonly used for numerical displays. They are controlled using binary-coded decimal (BCD) inputs. Let's convert BCD to decimal for driving a display:

bcd_data = '11011010' # Example BCD input 
decimal_value = int(bcd_data, 2)
print(f"Display Value: {decimal_value}")

In this example, we convert BCD data to decimal for displaying on a seven-segment display.


To wrap up our journey, this article has ventured into the intricate realm of binary-to-decimal and octal-to-decimal python conversion. Our expedition navigated through a diverse array of methods, embracing the utilization of functions like bin() and int(), harnessing the power of format specifiers, and exploring the convenience of the built-in format function. This comprehensive exploration promises to arm you with the necessary tools to confidently and effectively manipulate binary data and numpy binary to decimals in Python.

Beyond the technicalities, we have delved into the practical significance of binary-to-decimal conversion. We've unveiled its pivotal role across multifarious domains, encompassing networking, file management, digital electronics, and the realm of sensor data analysis. This newfound knowledge empowers you to confront an extensive spectrum of programming challenges with confidence and competence.


1. Why is binary-to-decimal conversion important in programming?

Binary-to-decimal conversion holds an elemental significance as it facilitates the seamless interaction between different numeric systems. It stands as a cornerstone in various programming spheres, from hardware manipulation to data communication and intricate data handling.

2. How can I perform binary-to-decimal conversion using the int() function?

Converting binary to decimal in Python through the int() function in Python is a straightforward endeavor. Just supply the binary string as an argument to int(). For instance, invoking decimal_value = int(binary_string, 2) will yield the decimal equivalent of the binary string, putting the power of numeric conversion at your fingertips.

3. When should I use format specifiers for binary-to-decimal conversion?

Format specifiers should be used when precision and control over formatting are essential. They allow you to customize the output format, making them suitable for specific requirements in numeric conversions.

4. Can you provide more examples of practical applications for binary-to-decimal conversion?

Certainly! Binary-to-decimal conversion is used in fields such as computer science, digital electronics, and data analysis. For instance, it's crucial in IP address conversions, file handling, error detection in data transmission, sensor data analysis, and driving displays.

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