Octal to Decimal Converter
Convert octal (base-8) numbers to decimal (base-10) values instantly.
About Octal to Decimal Converter
The Octal to Decimal Converter transforms octal (base-8) numbers into decimal (base-10) format. Each octal digit represents a power of 8.
For example, octal 377 = 3×64 + 7×8 + 7 = 255 in decimal. Enter your octal numbers and get instant decimal conversions.
Input
Decimal Result
How to Use
Enter Octal
Type octal numbers (digits 0-7) separated by spaces, commas, or newlines.
Convert
Click "Convert to Decimal" to see the result.
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Frequently Asked Questions
How do I convert octal to decimal?
Multiply each digit by 8 raised to its position power (from right, starting at 0). Example: 377 = 3×8² + 7×8¹ + 7×8⁰ = 192 + 56 + 7 = 255.
What is 755 in decimal?
755 octal = 493 decimal. This is the famous Unix permission code for rwxr-xr-x.
What digits are valid in octal?
Octal uses only digits 0-7. Any other digit (8 or 9) makes the number invalid for octal.
Is this free?
Yes, 100% free and runs in your browser.