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Octal and hexadecimal (hex) are numeral systems used to represent numbers, particularly in computer science and digital systems.

## Octal

Octal, also known as base-8, uses eight symbols (0-7) to represent numbers. Each digit in an octal number represents a group of three binary digits (bits). Octal was historically used in computing systems, but it’s less common today.

## Hexadecimal

Hexadecimal, or hex, is a base-16 numeral system that uses sixteen symbols (0-9 and A-F) to represent numbers. Each digit in a hex number represents a group of four bits. Hex is widely used in computer programming and digital systems due to its convenient representation of binary data.

### How to convert octal to hex

Convert every octal digit to 3 binary digits, with the following table:

Octal |
Binary |

0 | 000 |

1 | 001 |

2 | 010 |

3 | 011 |

4 | 100 |

5 | 101 |

6 | 110 |

7 | 111 |

convert every 4 binary digits from bit0 to 1 hex digit, with the following table:

Binary |
Hex |

0000 | 0 |

0001 | 1 |

0010 | 2 |

0011 | 3 |

0100 | 4 |

0101 | 5 |

0110 | 6 |

0111 | 7 |

1000 | 8 |

1001 | 9 |

1010 | A |

1011 | B |

1100 | C |

1101 | D |

1110 | E |

1111 | F |

#### See Also

## FAQs on Octal to Hex converter

### How do you convert octal to hexadecimal?

To convert octal to hexadecimal, follow these steps: Convert the octal number to binary. Group the binary digits in sets of 4 (starting from the right). If the last group has fewer than 4 digits, add leading zeros. Convert each group of 4 binary digits to its hexadecimal equivalent. Combine the hexadecimal groups to get the final hexadecimal representation.

### What is 123 octal to hexadecimal?

Convert 123 octal to binary: 001 010 011 Group the binary digits: 0010 1001 Convert each group to hexadecimal: 29 So, 123 octal is equivalent to 29 hexadecimal.

### What is 651.124 octal in hexadecimal?

Convert the integer part (651) to binary: 110 101 001 Convert the fractional part (0.124) to binary: 001 010 010 Combine both parts: 110101001.001010010 Group the binary digits: 1101 0100 1001.0010 1001 0010 Convert each group to hexadecimal: D492.2924 So, 651.124 octal is equivalent to D492.2924 hexadecimal.

### How do you convert 01011.1011 to decimal?

Convert the integer part (01011) to decimal: 11 (binary to decimal). Convert the fractional part (0.1011) to decimal: 0.625 (binary to decimal). Add both parts: 11 + 0.625 = 11.625 So, 01011.1011 binary is equivalent to 11.625 decimal.

### What is 4294967295 hexadecimal?

4294967295 hexadecimal is the representation of the maximum 32-bit unsigned integer value. It is often used in computing as the highest value that can be stored in a 32-bit memory space.

### How do I convert from octal?

To convert from octal to another base, such as decimal or hexadecimal, follow these general steps: Convert the octal number to binary. Convert the binary number to the desired base (decimal or hexadecimal) using appropriate grouping and conversion methods.

### Why octal and hexadecimal?

Octal and hexadecimal are used in computing for several reasons: Compact Representation: Octal and hexadecimal provide more compact representations for binary data, making them easier to read and work with. Binary Conversion: They simplify the conversion between binary and other bases, aiding programmers and engineers. Memory Addresses: Hexadecimal is particularly useful for representing memory addresses as it maps more directly to the underlying binary storage. Bit Manipulation: In low-level programming, these bases are helpful for bit manipulation and bitwise operations. Error Detection: Hexadecimal is used in CRC (Cyclic Redundancy Check) calculations and error detection.