Octal to Decimal Converter Online Tool

This online hex to decimal converter tool helps you to convert one input hex number (base 16) into a decimal number (base 10).

Octal numeral system (Oct) has 8 digits, include (0, 1, 2, 3, 4, 5, 6, 7). One Octal digit can be represented by 3 digits binary digits.

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 octal number represents as below (with n digits):

For each digit in octal numeral system (base 8), equals to each digit multiply by its position power to 8 in decimal numeral system.

Example 1: Convert octal number "2023" to decimal number:

Example 2: Convert octal number "3.14" to decimal number:

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

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

def octal_to_decimal(octal_str):
    decimal_number = int(octal_str, 8)
    return decimal_number


octal_input = '747'
decimal_output = octal_to_decimal(octal_input)
print('decimal result is:{0}'.format(decimal_output))

-------------------
decimal result is:487

public class NumberConvertManager {
    public static int octal_to_decimal(String octal_str) {
        return Integer.parseInt(octal_str, 8);
    }

    public static void main(String[] args) {
        String octal_input = "747";
        int decimal_output = octal_to_decimal(octal_input);
        System.out.println("decimal result is:" + decimal_output);
    }
}

-------------------
decimal result is:487