572 Octal in Decimal

Let's convert the octal number 572 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:

58 = 510

78 = 710

28 = 210

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

(5 × 64) + (7 × 8) + (2 × 1) = 320 + 56 + 2 = 378