Octal to Decimal converter

Enter octal number:
8
Decimal result:
10
Hex result:
16

Decimal to octal converter ►

How to convert from octal to decimal

A regular decimal number is the sum of the digits multiplied with 10n.

Example #1

137 in base 10 is equal to each digit multiplied with its corresponding 10n:

13710 = 1×102+3×101+7×100 = 100+30+7

Octal numbers are read the same way, but each digit counts 8n instead of 10n.

Multiply each digit of the hex number with its corresponding 8n.

Example #2

37 in base 8 is equal to each digit multiplied with its corresponding 8n:

378 = 3×81+7×80 = 24+7 = 31

Example #3

7014 in base 8 is equal to each digit multiplied with its corresponding power of 8:

70148 = 7×83+0×82+1×81+4×80= 3584+0+8+4 = 3596

Octal to decimal conversion table

Octal

base 8

Decimal

base 10

0 0
1 1
2 2
3 3
4 4
5 5
6 6
7 7
10 8
11 9
12 10
13 11
14 12
15 13
16 14
17 15
20 16
30 24
40 32
50 40
60 48
70 56
100 64

 

Decimal to Octal converter ►

 


See also

Write how to improve this page

NUMBER CONVERSION
RAPID TABLES