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Hex to Octal Converter

Free online tool to convert hexadecimal numbers to octal format instantly. Fast, accurate, and runs entirely in your browser.

Hex to BinaryHex to OctalHex to DecimalHex to Text
Hex to Octal
Octal to Hex
Input
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Configurations

Input values are parsed client-side. Real-time updates occur as you type. Multiple entries can be converted at once using spaces or newlines.

Output

Convert Hexadecimal (Base-16) to Octal (Base-8) Online

Easily convert base-16 hexadecimal numbers to base-8 octal values. Our online Hex to Octal Converter assists developers, system engineers, and students in manipulating memory states and address configurations. Convert hex strings instantly using the intermediate binary regrouping method.

The Regrouping Method (4-Bit to 3-Bit)

Direct mathematical conversion between hexadecimal and octal is complex. However, because both bases are powers of 2, you can convert them cleanly using binary. First, expand each hex character into a 4-bit binary sequence. Then, regroup the entire binary string into 3-bit clusters, which directly correspond to octal digits.

How to Convert Hex to Octal (Step-by-Step)

  1. Expand to 4-bits: Replace each hex digit with its corresponding 4-bit binary value (e.g. A to 1010).
  2. Combine and Regroup: Join the binary segments, and regroup them into clusters of three bits starting from the right.
  3. Pad the Left: Add leading zeros to the leftmost group if it has fewer than three bits.
  4. Convert to Octal: Translate each 3-bit cluster into its equivalent octal digit (0-7).

Intermediate Binary

Performs the conversion using bit-grouping operations, which is the most mathematically clean path.

System Integration

Ideal for system programmers converting old Unix file permission models and memory registers into modern values.

100% Client-Side

Conversions are processed client-side. Your inputs and outputs never leave your browser sandbox.

Hex to Octal Reference Table

HexadecimalIntermediate BinaryOctal Value
010000 00011
0A0000 101012
200010 000040
410100 0001101
610110 0001141
640110 0100144
FF1111 1111377

Frequently Asked Questions (FAQ)

To convert hex to octal, first convert each hex character to its equivalent 4-bit binary value. Next, regroup all these binary bits into clusters of three, starting from the rightmost bit. Finally, convert each 3-bit group into its corresponding octal digit (from 0 to 7).
Using binary as an intermediate step is much faster and less prone to mathematical errors than decimal because both 16 (hex) and 8 (octal) are direct powers of 2. Hex characters correspond to 4 bits and octal digits correspond to 3 bits, allowing you to convert by simply regrouping the binary stream.
Yes, your data is completely secure. Fuhut performs all calculations locally in your browser. No hex strings, register logs, or calculations are uploaded to our servers.