This article will discuss **how to convert binary to decimal in Python**. So there are different methods to convert binary to decimal in Python. A binary number is represented in the form of 0’s and 1’s, and a decimal number is in the form of an integer value.

## How to Convert Binary to Decimal in Python

Let’s consider a binary number – 1100

The decimal conversion process is We have to multiply each value with 2 to raise to the power of values start from 0 to n. And add all the values - (1*2^3)+ (1*2^2)+(0*2^1)+ (0*2^0) =(1*8)+(1*4)+(0*2)+(0*0) =8+4 =12

Hence the decimal value for the binary number 1100 is 12.

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## Method 1: Convert Binary to Decimal using int()

int() is used to convert binary numbers to decimals.

**Syntax:**

int(binary_number, 2)

where binary_number is the input binary number.

**Steps:**

- Input Binary number
- Convert binary to a decimal using int()
- Display the decimal number converted from the binary number

**Code:**

#input a number binary_number= input("Enter an Binary number ") print("The binary number is ",binary_number) #convert to decimal decimal_number= int(binary_number, 2) print("The decimal number is ",decimal_number)

**Output:**

So we are giving an input – 110110

Enter an Binary number 110110 The binary number is 110110 The decimal number is 54

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## Method 2: Convert Binary to Decimal without using the inbuilt function

**Steps**:

- Input binary number
- Specify the for loop, and inside that,
- Divide binary number by 10 to get the remainder
- Add the remainder to the decimal variable initialized.
- Divide the binary number by 2 and take only the integer part using the int() function
- End of the for loop
- Display the decimal number

**Code**:

#get an binary number input from user binary_number = int(input("Enter the Binary Number: ")) #create a decimal variable and set to 0 decimal_value=0 #initialize a variable i and set to 1 i = 1 #get the length of the binary number length = len(str(binary_number)) #logic to convert binary to decimal for k in range(length): reminder = binary_number % 10 decimal_value = decimal_value + (reminder * i) i = i * 2 binary_number = int(binary_number/10) #display the decimal value print("Decimal number is ", decimal_value)

**Output**:

So we are giving an input – 110110

Enter the Binary Number: 1100 Decimal number is 12

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## Method 3: Convert Binary to Decimal using Recursion

**Steps**:

- Input binary number
- Define the function, and inside that, check the condition and return 0 if the binary number is equal to 0; otherwise, go to step 3.
- Divide binary number by 10 to get the remainder.
- Add the remainder to the decimal variable initialized.
- Divide the binary number by 2 and take only the integer part using the int() function
- Return to function again
- Display the decimal number

**Code:**

#Binary_To_Decimal function with 2 parameters def Binary_To_Decimal(binary_number, exponent=1): if binary_number== 0: return 0 else: #actual conversion lofic k= binary_number % 10 binary_number= int(binary_number / 10) k= k * exponent return k + Binary_To_Decimal(binary_number, exponent * 2) #input binary_number = int(input('Enter a binary number: ')) #output print('The decimal value is ', Binary_To_Decimal(binary_number))

**Output**:

So we are giving an input – 1100

Enter a binary number: 1100 The decimal value is 12

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## Method 4: Convert Binary List to Decimal

In this case, we are going to convert some binary numbers to decimal through a list in Python

int() is used to convert binary numbers to decimals.

**Syntax:**

(int(str(i), 2) for i in binary_numbers)

where binary_number is the input binary number.

**Steps:**

- Input Binary numbers from a list
- Iterate the list of binary numbers and convert it to a decimal using the int() function. Place str() to convert the binary values from integer to string
- Use for loop to get the decimal values from binary values

**Code:**

#binary_numbers binary_numbers = [11,00,1110,111000,10001,110] #convert to decimal decimal_data= (int(str(i), 2) for i in binary_numbers) #display for i in decimal_data: print(i)

**Output**:

So we are giving 6 binary input values.

3 0 14 56 17 6

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## Method 5: Convert Binary string List to Decimal

In this method, we are going to convert some binary numbers of string type to decimal through a list in Python

int() is used to convert binary numbers to decimal.

**Syntax:**

(int(i, 2) for i in binary_numbers)

where binary_number is the input binary number.

**Steps:**

- Input Binary numbers from a list
- Iterate the list of binary numbers and convert them to decimals using the int() function.
- Use for loop to get the decimal values from binary values

**Code:**

#binary_numbers binary_numbers = ['11','00','1110','111000','10001','110'] #convert to decimal decimal_data= (int(i, 2) for i in binary_numbers) #display for i in decimal_data: print(i)

**Output**:

So we are giving 6 binary input values.

3 0 14 56 17 6

So, these are the ways to convert Binary values to Decimal values in Python.

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