# Octal to Decimal Converter Online

**Decimal Number**_{10}

**Hex Number**_{16}

**Binary Number**_{2}## Related Pages: Hex to Decimal, Decimal to Hex, Decimal to Octal, Binary to Decimal, Decimal to Binary.

## About Octal to Decimal Converter:

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:

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:

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, itâ€™s inspired by 10 fingers of human.

## How to convert from Octal to decimal?

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:

## Octal to Decimal conversion table:

Octal | Decimal | Octal | Decimal |
---|---|---|---|

1 | 1 | 30 | 24 |

2 | 2 | 40 | 32 |

3 | 3 | 50 | 40 |

4 | 4 | 60 | 48 |

5 | 5 | 70 | 56 |

6 | 6 | 100 | 64 |

7 | 7 | 110 | 72 |

10 | 8 | 120 | 80 |

11 | 9 | 130 | 88 |

12 | 10 | 140 | 96 |

13 | 11 | 150 | 104 |

14 | 12 | 160 | 112 |

15 | 13 | 170 | 120 |

16 | 14 | 200 | 128 |

17 | 15 | 300 | 192 |

20 | 16 | 200 | 512 |

21 | 17 | 300 | 768 |

22 | 18 | 400 | 256 |

23 | 19 | 500 | 320 |

24 | 20 | 600 | 384 |

## More information:

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

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

## Convert Octal to Decimal with Python:

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