Binary to Decimal Converter Online Tool

This online binary to decimal converter tool helps you to convert one input binary number (base 2) into a decimal number (base 10).

Binary numeral system has 2 digits, include (0, 1). Four binary digits can be represented by 1 hexadecimal digits, and three binary digits can be represented by one octal digits. Binary is the numeral system that most close to electronic circuit hardware.

Decimal numeral system (also called Hindu-Arabic, or Arabic) has 10 digits, include (0, 1, 2, 3, 4, 5, 6, 7, 8, 9), it's the most used number system in our daily life. Decimal numeral system is also one of the most ancient number system, it's inspired by 10 fingers of human.

For binary number represents as below (with n digits):

For each digit in binary numeral system (base 2), equals to each digit multiply by its position power to 2 in decimal numeral system.

Example 1: Convert binary number "1101" to decimal number:

Example 2: Convert binary number "0.101" to decimal number:

Wikipedia (Binary): https://en.wikipedia.org/wiki/Binary_number

Wikipedia (Decimal): https://en.wikipedia.org/wiki/Decimal

def binary_to_decimal(binary_str):
    decimal_number = int(binary_str, 2)
    return decimal_number


binary_input = '1101'
decimal_output = binary_to_decimal(binary_input)
print('decimal result is:{0}'.format(decimal_output))

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decimal result is:13

public class NumberConvertManager {
    public static int binary_to_decimal(String binary_str) {
        return Integer.parseInt(binary_str, 2);
    }

    public static void main(String[] args) {
        String binary_input  = "1101";
        int decimal_output = binary_to_decimal(binary_input);
        System.out.println("decimal result is:" + decimal_output);
    }
}

-------------------
decimal result is:13