- Open the Octal to Decimal Converter and find the main field: Octal number.
- Type your values in that field. The placeholder shows an example format (77).
- Click "Convert" to compute the result in your browser.
- Read the result in the Result section. Use Copy to paste the output elsewhere.
Octal to Decimal Converter
Convert octal numbers (base-8) to decimal numbers (base-10) with this simple online tool.
Calculator
Enter the values described below, then run. Use Load sample to try a prefilled example when available.
Format hints
77
How to Use This Tool
Learn More About Octal to Decimal Converter
Octal and Decimal Number Systems
The octal number system is a base-8 system, using digits from 0 to 7. Each position in an octal number represents a power of 8. The decimal number system is a base-10 system, using digits from 0 to 9.
Example
Octal: 23
Decimal: (2 8^1) + (3 8^0) = 16 + 3 = 19
About
Convert octal numbers (base-8) to decimal numbers (base-10) with this simple online tool. Just enter an octal string, and the converter will instantly display its decimal equivalent.
Examples
Valid octal
Octal number
Input
10
Output
Shown in the Result area after you click the action button.
Zero
Octal number
Input
0
Output
Shown in the Result area after you click the action button.
Use Cases
- Computer science education and learning number systems
- Software development for handling file permissions
- Digital electronics and embedded systems programming
- Understanding different data representations