21331 octal to binary

Here we will show you how to convert the octal number 21331 to a binary number. First note that the octal number system has eight different digits (0 1 2 3 4 5 6 7) and the binary number system has only two different digits (0 and 1).

The four steps used to convert 21331 from octal to binary are explained below.

Step 1)
Multiply the last digit in 21331 by 8⁰, multiply the second to last digit in 21331 by 8¹, multiply the third to last digit in 21331 by 8², multiply the fourth to last digit in 21331 by 8³, and so on, until all the digits are used:

1 × 8⁰ = 1
3 × 8¹ = 24
3 × 8² = 192
1 × 8³ = 512
2 × 8⁴ = 8192

Step 2)
Next, we add up all the products we got from Step 1, like this:

1 + 24 + 192 + 512 + 8192 = 8921

Step 3)
Now we divide the sum from Step 2 by 2. Put the remainder aside. Then divide the whole part by 2 again, and put the remainder aside again. Keep doing this until the whole part is 0.

8921 ÷ 2 = 4460 with 1 remainder
4460 ÷ 2 = 2230 with 0 remainder
2230 ÷ 2 = 1115 with 0 remainder
1115 ÷ 2 = 557 with 1 remainder
557 ÷ 2 = 278 with 1 remainder
278 ÷ 2 = 139 with 0 remainder
139 ÷ 2 = 69 with 1 remainder
69 ÷ 2 = 34 with 1 remainder
34 ÷ 2 = 17 with 0 remainder
17 ÷ 2 = 8 with 1 remainder
8 ÷ 2 = 4 with 0 remainder
4 ÷ 2 = 2 with 0 remainder
2 ÷ 2 = 1 with 0 remainder
1 ÷ 2 = 0 with 1 remainder

Step 4)
In the final step, we take the remainders from Step 3 and put them together in reverse order to get our answer to 21331 octal to binary:

21331 octal = 10001011011001 binary

Octal to Binary Converter
Here you can convert another octal number to binary. Remember, octal numbers only include digits 0 through 7.

21332 octal to binary
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