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Octal to Decimal

Convert octal numbers to decimal format

Octal to Decimal

Convert base-8 octal numbers to familiar base-10 decimal numbers. Useful for understanding Unix permissions and legacy systems.

Conversion Method

  • Each position is a power of 8
  • Rightmost = 8^0 = 1
  • Then 8^1 = 8, 8^2 = 64, etc.

Examples

  • Octal 10 = Decimal 8
  • Octal 755 = Decimal 493
  • Octal 777 = Decimal 511