Octal to Decimal Converter
Convert octal numbers (base-8) to decimal (base-10), binary (base-2), and hexadecimal (base-16) with this easy-to-use calculator.
Octal to Decimal converter
Features
Multi-Base Conversion
Convert octal numbers to decimal, binary, and hexadecimal formats simultaneously.
Input Validation
Automatic validation ensures only valid octal numbers (0-7) are processed.
Instant Results
Get immediate conversions with real-time error checking and feedback.
How to Use
1. Enter Number
Input your octal number using digits 0-7 only.
2. Convert
Click the convert button to see results in multiple bases.
3. View Results
See your number converted to decimal, binary, and hexadecimal.
4. Reset
Clear all fields to start a new conversion.
About Octal Numbers
Octal is a base-8 number system that uses digits from 0 to 7. It's commonly used in computing and digital systems, especially when working with file permissions in Unix-like operating systems.
Each digit in an octal number represents a power of 8. For example, the octal number 127₈ is equal to 1×8² + 2×8¹ + 7×8⁰ = 64 + 16 + 7 = 87₁₀ in decimal.
Frequently Asked Questions
Why use octal numbers?
Octal numbers are particularly useful in computing for representing file permissions and binary data in a more compact form than binary.
What are valid octal digits?
Octal numbers only use digits 0 through 7. The digits 8 and 9 are not valid in octal notation.
How accurate are the conversions?
Our converter provides precise conversions using JavaScript's built-in number parsing and conversion functions.