Octal to Decimal Converter

What is Octal to Decimal?

Octal to decimal means converting a number from base 8 to base 10.

Octal uses digits 0 through 7.

Decimal uses digits 0 through 9.

This page helps you convert octal to decimal quickly and clearly.

Example: Octal 755 equals decimal 493.

Breakdown: 7 x 64 plus 5 x 8 plus 5 equals 493.

How It Works

There is one input box for the octal number.

Enter an octal number in the field, then run the conversion.

The tool checks the input first and then computes the decimal value.

You can press the Convert to Decimal button or press Enter.

The output shows both forms as Octal value equals Decimal value.

Large results include commas for easy reading.

The page shows an error message for empty or invalid input.

Input rules:

• Use digits 0 to 7 only.
• Use whole numbers only.
• Leave out letters and symbols.
• Leave out spaces inside the number.
• Leave out prefixes like 0o.
• Use positive values only.
• Leading zeros work as expected.

How to Use This Tool

1. Click the input box.
2. Type an octal number using digits 0 to 7.
3. Press Convert to Decimal or press Enter.
4. Read the decimal result below the button.

Output notes:

• You will see Octal value equals Decimal value.
• The decimal number may show commas for thousands.
• Very long inputs can round in the decimal view.

Why Use This Tool?

You get fast and reliable octal to decimal results.

It validates input and shows a clear result or a clear error.

The process stays simple and focused.

You will also find one related link for Binary and Decimal conversion.

Common Use Cases

• Unix and Linux file permissions like 755 or 644.
• Embedded device readouts that print octal values.
• Math homework and base conversion practice.
• Data files from older systems that store octal numbers.

Examples

Try these to check your work.

• Octal 10 equals Decimal 8.
• Octal 100 equals Decimal 64.
• Octal 755 equals Decimal 493.
• Octal 777 equals Decimal 511.

Read the result as shown, Octal value equals Decimal value.