Binary/Octal/Decimal/hexadecimal converter

Convert Octal to Decimal.

Octal → Decimal
Before conversion:

How to use Base Converter

Enter the Octal value you want to convert and click the "Convert" button.

The input value will be calculated and the converted result will be displayed in Decimal.

The calculation method for conversion is also displayed.

Numerical input range

Octal:0–7

Conversion by base number

Binary -> Octal Binary -> Decimal Binary -> Hexadecimal Octal -> Binary Octal -> Decimal Octal -> Hexadecimal Decimal -> Binary Decimal -> Octal Decimal -> Hexadecimal Hexadecimal -> Binary Hexadecimal -> Octal Hexadecimal -> Decimal

How to convert from Octal to Decimal

Method of calculation

The octal number continues from the first digit as 80, 81, 82, 83 .

Therefore, when converting an octal number to a decimal number, you can find it by calculating the number of digits x 8n for each digit.

  • 1. Calculate 8n for each digit.
  • 2. Calculate all non-zero digits x 8n.
  • 3. The sum of all calculated numbers is the result of converting to decimal.

Calculation example

Example: Convert Octal "703" to Decimal

DigitOctal8n
1380 = 1
2081 = 8
3782 = 64

Calculating the number of non-zero digits x 8n yields "3×80 + 7×82 = 3 + 448 = 451".

Therefore, converting octal number "703" to decimal number becomes "451".

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