Octal to Decimal

Convert base-8 values into decimal numbers and compare the matching hex and binary forms.

Octal
Valid: 0-7 only
Decimal (Base 10)
Result will appear here
Hexadecimal (Base 16)
—
Binary (Base 2)
—
Quick Reference
0→0
1→1
7→7
8→10
15→17
16→20
64→100
255→377
493→755
511→777

What does Octal to Decimal do?

Octal to Decimal converts base-8 values into base-10 numbers.

  • Primary use: Octal to Decimal converts base-8 values into base-10 numbers.
  • Key technical fact: Octal uses 8 symbols, 0-7, and each octal digit represents 3 bits.
  • Practical check: Check accepted digits, ranges, signs, prefixes, and rounding before copying the converted value into code.
Topic Direct answer Source
Direct answer Octal to Decimal converts base-8 values into base-10 numbers. Browser JavaScript
Key fact Octal uses 8 symbols, 0-7, and each octal digit represents 3 bits. Browser JavaScript
Processing model Runs locally in the browser; no production Node server receives the input. Browser JavaScript

Convert octal values to decimal numbers

Octal to Decimal turns base-8 input into base-10 output and also shows the equivalent hexadecimal and binary values. It is useful for checking Unix-style permissions, legacy data formats, and compact representations of binary groups.

Octal uses only digits 0 through 7. Digits 8 and 9 are invalid, and prefixes such as a leading 0 or 0o should match the notation used by your source system.

How to use

  1. Type or paste an octal value into the input field.
  2. Review the decimal result and the matching hex and binary outputs.
  3. Copy the decimal value, or clear the form before checking another octal number.

What is octal to decimal conversion?

Octal is base 8, so each digit represents a power of eight and maps neatly to three binary bits. Converting to decimal rewrites the same quantity in base 10 for easier reading, arithmetic, or documentation.

Input notes

Use digits 0-7 only. Preserve leading zeros separately if they are meaningful in the source, such as permission notation, because numeric conversion focuses on value rather than display width.

Example

The octal value 377 is decimal 255, the same byte value shown as FF in hex:

--- Octal Input ---
377

--- Decimal ---
255

--- Hex ---
FF

--- Binary ---
11111111

MCP integration

MCP (Model Context Protocol) lets AI agents and apps discover and run Coding.Tools utilities for repeatable conversions, formatting, hashing, and generation workflows.

MCP tool name: octal-to-decimal

MCP endpoint: https://coding.tools/mcp

Call tools/list first. Each tool entry includes inputSchema, outputSchema, and examples so an AI agent or client can build valid arguments without guessing.

For tools/call, read result.content[0].text for the display value and result.structuredContent for machine parsing. Tool-level failures return isError: true; protocol failures return a JSON-RPC error.

Example tools/call request:

curl -s https://coding.tools/mcp \
  -H "Content-Type: application/json" \
  -H "Accept: application/json" \
  -H "MCP-Protocol-Version: 2025-06-18" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"octal-to-decimal","arguments":{"input":"755"}}}'

Most text and data tools accept an input string plus optional options. Browser-only image tools are listed for discovery and return a web UI link when they need browser image APIs.