6571 Octal in Decimal

Let's convert the octal number 6571 to decimal without using a calculator:

Write down the powers of 8 starting from the right, with the first digit corresponding to 8⁰, the second to 8¹, the third to 8², and so on.

Convert each octal digit to its decimal equivalent:

68 = 610

58 = 510

78 = 710

18 = 110

Multiply each octal digit by its corresponding power of 8 and sum the results.

(6 × 512) + (5 × 64) + (7 × 8) + (1 × 1) = 3072 + 320 + 56 + 1 = 3449