25 Octal in Decimal

Let's convert the octal number 25 to decimal without using a calculator:

Step 1: Write Down Powers of 8

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.

Step 2: Convert Each Octal Digit to Decimal

Convert each octal digit to its decimal equivalent:

2₈ = 2₁₀

5₈ = 5₁₀

Step 3: Multiply and Sum

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

(2 × 8) + (5 × 1) = 16 + 5 = 21

So, the decimal representation of the octal number 25 is 21.

Octal To Decimal Converter

Other examples of Octal to Decimal conversion