01 / Fast steps
- Enter a value in decimal, or in octal.
- Read the converted result instantly, updated as you type.
Decimal to Octal Converter
Enter a value in decimal or in octal to instantly get the converted value in the other base.
Updates instantly as you type
02 / Best for
- Converting Unix file permission values between decimal and octal.
- Checking an octal literal used in older programming languages.
- Learning or teaching how octal numbers work.
03 / Keep in mind
- Limited to safe integer values (up to 2^53 - 1), larger numbers may lose precision.
Tool connections
Related tools
faq
Questions, answered.
01Does this also convert octal to decimal?
Yes, enter a value in either field and the other one updates instantly — the same tool works in both directions.
02Does it support negative numbers?
Yes, a leading minus sign is preserved in both directions.
03Is Decimal to Octal Converter free to use?
Yes, Decimal to Octal Converter is completely free, with no sign-up and no usage limits. It runs entirely in your browser, so your data never leaves your device.