Octal to decimal converter
Enter a value that uses digits 0–7.
Convert an octal number to decimal.
About this tool
The octal to decimal converter changes a base 8 number into familiar base 10 notation. Use it to interpret Unix file modes, read values from older systems, or check answers in a number systems lesson. Enter a whole octal value containing digits from zero through seven. The result shows the same numeric value in decimal form for easier comparison and calculation.